From 79f960e29cfc87db324479ef982a3f97025328dc Mon Sep 17 00:00:00 2001
From: Len Baker <len.baker@gmx.com>
Date: Sat, 23 Oct 2021 17:40:36 +0200
Subject: [PATCH 01/78] platform/x86: thinkpad_acpi: Convert platform driver to
 use dev_groups

Platform drivers have the option of having the platform core create and
remove any needed sysfs attribute files. So take advantage of that and
refactor the attributes management to avoid to register them "by hand".

Also, due to some attributes are optionals, refactor the code and move
the logic inside the "is_visible" callbacks of the attribute_group
structures.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Len Baker <len.baker@gmx.com>
Link: https://lore.kernel.org/r/20211023154036.6800-1-len.baker@gmx.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 528 +++++++++++++--------------
 1 file changed, 244 insertions(+), 284 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index b3ac9c3f3b7c..37aadc64d4e0 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -332,12 +332,11 @@ static struct {
 	u32 battery_force_primary:1;
 	u32 input_device_registered:1;
 	u32 platform_drv_registered:1;
-	u32 platform_drv_attrs_registered:1;
 	u32 sensors_pdrv_registered:1;
-	u32 sensors_pdrv_attrs_registered:1;
 	u32 sensors_pdev_attrs_registered:1;
 	u32 hotkey_poll_active:1;
 	u32 has_adaptive_kbd:1;
+	u32 kbd_lang:1;
 } tp_features;
 
 static struct {
@@ -983,20 +982,6 @@ static void tpacpi_shutdown_handler(struct platform_device *pdev)
 	}
 }
 
-static struct platform_driver tpacpi_pdriver = {
-	.driver = {
-		.name = TPACPI_DRVR_NAME,
-		.pm = &tpacpi_pm,
-	},
-	.shutdown = tpacpi_shutdown_handler,
-};
-
-static struct platform_driver tpacpi_hwmon_pdriver = {
-	.driver = {
-		.name = TPACPI_HWMON_DRVR_NAME,
-	},
-};
-
 /*************************************************************************
  * sysfs support helpers
  */
@@ -1479,53 +1464,6 @@ static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
 static DRIVER_ATTR_RW(uwb_emulstate);
 #endif
 
-/* --------------------------------------------------------------------- */
-
-static struct driver_attribute *tpacpi_driver_attributes[] = {
-	&driver_attr_debug_level, &driver_attr_version,
-	&driver_attr_interface_version,
-};
-
-static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
-{
-	int i, res;
-
-	i = 0;
-	res = 0;
-	while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
-		res = driver_create_file(drv, tpacpi_driver_attributes[i]);
-		i++;
-	}
-
-#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
-	if (!res && dbg_wlswemul)
-		res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
-	if (!res && dbg_bluetoothemul)
-		res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
-	if (!res && dbg_wwanemul)
-		res = driver_create_file(drv, &driver_attr_wwan_emulstate);
-	if (!res && dbg_uwbemul)
-		res = driver_create_file(drv, &driver_attr_uwb_emulstate);
-#endif
-
-	return res;
-}
-
-static void tpacpi_remove_driver_attributes(struct device_driver *drv)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
-		driver_remove_file(drv, tpacpi_driver_attributes[i]);
-
-#ifdef THINKPAD_ACPI_DEBUGFACILITIES
-	driver_remove_file(drv, &driver_attr_wlsw_emulstate);
-	driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
-	driver_remove_file(drv, &driver_attr_wwan_emulstate);
-	driver_remove_file(drv, &driver_attr_uwb_emulstate);
-#endif
-}
-
 /*************************************************************************
  * Firmware Data
  */
@@ -2999,7 +2937,14 @@ static struct attribute *adaptive_kbd_attributes[] = {
 	NULL
 };
 
+static umode_t hadaptive_kbd_attr_is_visible(struct kobject *kobj,
+					     struct attribute *attr, int n)
+{
+	return tp_features.has_adaptive_kbd ? attr->mode : 0;
+}
+
 static const struct attribute_group adaptive_kbd_attr_group = {
+	.is_visible = hadaptive_kbd_attr_is_visible,
 	.attrs = adaptive_kbd_attributes,
 };
 
@@ -3094,8 +3039,6 @@ static void hotkey_exit(void)
 	hotkey_poll_stop_sync();
 	mutex_unlock(&hotkey_mutex);
 #endif
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj, &hotkey_attr_group);
-
 	dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
 		   "restoring original HKEY status and mask\n");
 	/* yes, there is a bitwise or below, we want the
@@ -3490,14 +3433,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 			 */
 			if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
 				       "MHKA", "dd", 2)) {
-				if (hotkey_adaptive_all_mask != 0) {
+				if (hotkey_adaptive_all_mask != 0)
 					tp_features.has_adaptive_kbd = true;
-					res = sysfs_create_group(
-						&tpacpi_pdev->dev.kobj,
-						&adaptive_kbd_attr_group);
-					if (res)
-						goto err_exit;
-				}
 			} else {
 				tp_features.has_adaptive_kbd = false;
 				hotkey_adaptive_all_mask = 0x0U;
@@ -3551,9 +3488,6 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	}
 
 	tabletsw_state = hotkey_init_tablet_mode();
-	res = sysfs_create_group(&tpacpi_pdev->dev.kobj, &hotkey_attr_group);
-	if (res)
-		goto err_exit;
 
 	/* Set up key map */
 	keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
@@ -3650,9 +3584,6 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	return 0;
 
 err_exit:
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj, &hotkey_attr_group);
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj, &adaptive_kbd_attr_group);
-
 	return (res < 0) ? res : 1;
 }
 
@@ -4384,7 +4315,14 @@ static struct attribute *bluetooth_attributes[] = {
 	NULL
 };
 
+static umode_t bluetooth_attr_is_visible(struct kobject *kobj,
+					 struct attribute *attr, int n)
+{
+	return tp_features.bluetooth ? attr->mode : 0;
+}
+
 static const struct attribute_group bluetooth_attr_group = {
+	.is_visible = bluetooth_attr_is_visible,
 	.attrs = bluetooth_attributes,
 };
 
@@ -4406,11 +4344,7 @@ static void bluetooth_shutdown(void)
 
 static void bluetooth_exit(void)
 {
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
-			&bluetooth_attr_group);
-
 	tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
-
 	bluetooth_shutdown();
 }
 
@@ -4524,17 +4458,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 				RFKILL_TYPE_BLUETOOTH,
 				TPACPI_RFK_BLUETOOTH_SW_NAME,
 				true);
-	if (res)
-		return res;
-
-	res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
-				&bluetooth_attr_group);
-	if (res) {
-		tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
-		return res;
-	}
-
-	return 0;
+	return res;
 }
 
 /* procfs -------------------------------------------------------------- */
@@ -4641,7 +4565,14 @@ static struct attribute *wan_attributes[] = {
 	NULL
 };
 
+static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
+				   int n)
+{
+	return tp_features.wan ? attr->mode : 0;
+}
+
 static const struct attribute_group wan_attr_group = {
+	.is_visible = wan_attr_is_visible,
 	.attrs = wan_attributes,
 };
 
@@ -4663,11 +4594,7 @@ static void wan_shutdown(void)
 
 static void wan_exit(void)
 {
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
-		&wan_attr_group);
-
 	tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
-
 	wan_shutdown();
 }
 
@@ -4711,18 +4638,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
 				RFKILL_TYPE_WWAN,
 				TPACPI_RFK_WWAN_SW_NAME,
 				true);
-	if (res)
-		return res;
-
-	res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
-				&wan_attr_group);
-
-	if (res) {
-		tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
-		return res;
-	}
-
-	return 0;
+	return res;
 }
 
 /* procfs -------------------------------------------------------------- */
@@ -5623,30 +5539,35 @@ static ssize_t cmos_command_store(struct device *dev,
 
 static DEVICE_ATTR_WO(cmos_command);
 
+static struct attribute *cmos_attributes[] = {
+	&dev_attr_cmos_command.attr,
+	NULL
+};
+
+static umode_t cmos_attr_is_visible(struct kobject *kobj,
+				    struct attribute *attr, int n)
+{
+	return cmos_handle ? attr->mode : 0;
+}
+
+static const struct attribute_group cmos_attr_group = {
+	.is_visible = cmos_attr_is_visible,
+	.attrs = cmos_attributes,
+};
+
 /* --------------------------------------------------------------------- */
 
 static int __init cmos_init(struct ibm_init_struct *iibm)
 {
-	int res;
-
 	vdbg_printk(TPACPI_DBG_INIT,
-		"initializing cmos commands subdriver\n");
+		    "initializing cmos commands subdriver\n");
 
 	TPACPI_ACPIHANDLE_INIT(cmos);
 
 	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
-		str_supported(cmos_handle != NULL));
+		    str_supported(cmos_handle != NULL));
 
-	res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
-	if (res)
-		return res;
-
-	return (cmos_handle) ? 0 : 1;
-}
-
-static void cmos_exit(void)
-{
-	device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
+	return cmos_handle ? 0 : 1;
 }
 
 static int cmos_read(struct seq_file *m)
@@ -5687,7 +5608,6 @@ static struct ibm_struct cmos_driver_data = {
 	.name = "cmos",
 	.read = cmos_read,
 	.write = cmos_write,
-	.exit = cmos_exit,
 };
 
 /*************************************************************************
@@ -6198,7 +6118,6 @@ struct ibm_thermal_sensors_struct {
 };
 
 static enum thermal_access_mode thermal_read_mode;
-static const struct attribute_group *thermal_attr_group;
 static bool thermal_use_labels;
 
 /* idx is zero-based */
@@ -6371,12 +6290,26 @@ static struct attribute *thermal_temp_input_attr[] = {
 	NULL
 };
 
-static const struct attribute_group thermal_temp_input16_group = {
-	.attrs = thermal_temp_input_attr
-};
+static umode_t thermal_attr_is_visible(struct kobject *kobj,
+				       struct attribute *attr, int n)
+{
+	if (thermal_read_mode == TPACPI_THERMAL_NONE)
+		return 0;
 
-static const struct attribute_group thermal_temp_input8_group = {
-	.attrs = &thermal_temp_input_attr[8]
+	if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) ||
+	    attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) ||
+	    attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) ||
+	    attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) {
+		if (thermal_read_mode != TPACPI_THERMAL_TPEC_16)
+			return 0;
+	}
+
+	return attr->mode;
+}
+
+static const struct attribute_group thermal_attr_group = {
+	.is_visible = thermal_attr_is_visible,
+	.attrs = thermal_temp_input_attr,
 };
 
 #undef THERMAL_SENSOR_ATTR_TEMP
@@ -6400,7 +6333,14 @@ static struct attribute *temp_label_attributes[] = {
 	NULL
 };
 
+static umode_t temp_label_attr_is_visible(struct kobject *kobj,
+					  struct attribute *attr, int n)
+{
+	return thermal_use_labels ? attr->mode : 0;
+}
+
 static const struct attribute_group temp_label_attr_group = {
+	.is_visible = temp_label_attr_is_visible,
 	.attrs = temp_label_attributes,
 };
 
@@ -6411,7 +6351,6 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 	u8 t, ta1, ta2, ver = 0;
 	int i;
 	int acpi_tmp7;
-	int res;
 
 	vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
 
@@ -6486,42 +6425,7 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
 		thermal_read_mode);
 
-	switch (thermal_read_mode) {
-	case TPACPI_THERMAL_TPEC_16:
-		thermal_attr_group = &thermal_temp_input16_group;
-		break;
-	case TPACPI_THERMAL_TPEC_8:
-	case TPACPI_THERMAL_ACPI_TMP07:
-	case TPACPI_THERMAL_ACPI_UPDT:
-		thermal_attr_group = &thermal_temp_input8_group;
-		break;
-	case TPACPI_THERMAL_NONE:
-	default:
-		return 1;
-	}
-
-	res = sysfs_create_group(&tpacpi_hwmon->kobj, thermal_attr_group);
-	if (res)
-		return res;
-
-	if (thermal_use_labels) {
-		res = sysfs_create_group(&tpacpi_hwmon->kobj, &temp_label_attr_group);
-		if (res) {
-			sysfs_remove_group(&tpacpi_hwmon->kobj, thermal_attr_group);
-			return res;
-		}
-	}
-
-	return 0;
-}
-
-static void thermal_exit(void)
-{
-	if (thermal_attr_group)
-		sysfs_remove_group(&tpacpi_hwmon->kobj, thermal_attr_group);
-
-	if (thermal_use_labels)
-		sysfs_remove_group(&tpacpi_hwmon->kobj, &temp_label_attr_group);
+	return thermal_read_mode == TPACPI_THERMAL_NONE ? 1 : 0;
 }
 
 static int thermal_read(struct seq_file *m)
@@ -6548,7 +6452,6 @@ static int thermal_read(struct seq_file *m)
 static struct ibm_struct thermal_driver_data = {
 	.name = "thermal",
 	.read = thermal_read,
-	.exit = thermal_exit,
 };
 
 /*************************************************************************
@@ -8723,14 +8626,33 @@ static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
 static DRIVER_ATTR_RW(fan_watchdog);
 
 /* --------------------------------------------------------------------- */
+
 static struct attribute *fan_attributes[] = {
-	&dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
+	&dev_attr_pwm1_enable.attr,
+	&dev_attr_pwm1.attr,
 	&dev_attr_fan1_input.attr,
-	NULL, /* for fan2_input */
+	&dev_attr_fan2_input.attr,
+	&driver_attr_fan_watchdog.attr,
 	NULL
 };
 
+static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
+				   int n)
+{
+	if (fan_status_access_mode == TPACPI_FAN_NONE &&
+	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
+		return 0;
+
+	if (attr == &dev_attr_fan2_input.attr) {
+		if (!tp_features.second_fan)
+			return 0;
+	}
+
+	return attr->mode;
+}
+
 static const struct attribute_group fan_attr_group = {
+	.is_visible = fan_attr_is_visible,
 	.attrs = fan_attributes,
 };
 
@@ -8761,7 +8683,6 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
 
 static int __init fan_init(struct ibm_init_struct *iibm)
 {
-	int rc;
 	unsigned long quirks;
 
 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
@@ -8858,27 +8779,10 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 		fan_get_status_safe(NULL);
 
 	if (fan_status_access_mode != TPACPI_FAN_NONE ||
-	    fan_control_access_mode != TPACPI_FAN_WR_NONE) {
-		if (tp_features.second_fan) {
-			/* attach second fan tachometer */
-			fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
-					&dev_attr_fan2_input.attr;
-		}
-		rc = sysfs_create_group(&tpacpi_hwmon->kobj,
-					 &fan_attr_group);
-		if (rc < 0)
-			return rc;
-
-		rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
-					&driver_attr_fan_watchdog);
-		if (rc < 0) {
-			sysfs_remove_group(&tpacpi_hwmon->kobj,
-					&fan_attr_group);
-			return rc;
-		}
+	    fan_control_access_mode != TPACPI_FAN_WR_NONE)
 		return 0;
-	} else
-		return 1;
+
+	return 1;
 }
 
 static void fan_exit(void)
@@ -8886,11 +8790,6 @@ static void fan_exit(void)
 	vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
 		    "cancelling any pending fan watchdog tasks\n");
 
-	/* FIXME: can we really do this unconditionally? */
-	sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
-	driver_remove_file(&tpacpi_hwmon_pdriver.driver,
-			   &driver_attr_fan_watchdog);
-
 	cancel_delayed_work(&fan_watchdog_task);
 	flush_workqueue(tpacpi_wq);
 }
@@ -9952,6 +9851,35 @@ static ssize_t palmsensor_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(palmsensor);
 
+static struct attribute *proxsensor_attributes[] = {
+	&dev_attr_dytc_lapmode.attr,
+	&dev_attr_palmsensor.attr,
+	NULL
+};
+
+static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
+					  struct attribute *attr, int n)
+{
+	if (attr == &dev_attr_dytc_lapmode.attr) {
+		/*
+		 * Platforms before DYTC version 5 claim to have a lap sensor,
+		 * but it doesn't work, so we ignore them.
+		 */
+		if (!has_lapsensor ||  dytc_version < 5)
+			return 0;
+	} else if (attr == &dev_attr_palmsensor.attr) {
+		if (!has_palmsensor)
+			return 0;
+	}
+
+	return attr->mode;
+}
+
+static const struct attribute_group proxsensor_attr_group = {
+	.is_visible = proxsensor_attr_is_visible,
+	.attrs = proxsensor_attributes,
+};
+
 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
 {
 	int palm_err, lap_err, err;
@@ -9970,41 +9898,18 @@ static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
 	if (lap_err && (lap_err != -ENODEV))
 		return lap_err;
 
-	if (has_palmsensor) {
-		err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
-		if (err)
-			return err;
-	}
-
 	/* Check if we know the DYTC version, if we don't then get it */
 	if (!dytc_version) {
 		err = dytc_get_version();
 		if (err)
 			return err;
 	}
-	/*
-	 * Platforms before DYTC version 5 claim to have a lap sensor, but it doesn't work, so we
-	 * ignore them
-	 */
-	if (has_lapsensor && (dytc_version >= 5)) {
-		err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
-		if (err)
-			return err;
-	}
-	return 0;
-}
 
-static void proxsensor_exit(void)
-{
-	if (has_lapsensor)
-		sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
-	if (has_palmsensor)
-		sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
+	return 0;
 }
 
 static struct ibm_struct proxsensor_driver_data = {
 	.name = "proximity-sensor",
-	.exit = proxsensor_exit,
 };
 
 /*************************************************************************
@@ -10421,7 +10326,14 @@ static struct attribute *kbdlang_attributes[] = {
 	NULL
 };
 
+static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
+				       struct attribute *attr, int n)
+{
+	return tp_features.kbd_lang ? attr->mode : 0;
+}
+
 static const struct attribute_group kbdlang_attr_group = {
+	.is_visible = kbdlang_attr_is_visible,
 	.attrs = kbdlang_attributes,
 };
 
@@ -10430,28 +10342,12 @@ static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
 	int err, output;
 
 	err = get_keyboard_lang(&output);
-	/*
-	 * If support isn't available (ENODEV) then don't return an error
-	 * just don't create the sysfs group.
-	 */
-	if (err == -ENODEV)
-		return 0;
-
-	if (err)
-		return err;
-
-	/* Platform supports this feature - create the sysfs file */
-	return sysfs_create_group(&tpacpi_pdev->dev.kobj, &kbdlang_attr_group);
-}
-
-static void kbdlang_exit(void)
-{
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj, &kbdlang_attr_group);
+	tp_features.kbd_lang = !err;
+	return err;
 }
 
 static struct ibm_struct kbdlang_driver_data = {
 	.name = "kbdlang",
-	.exit = kbdlang_exit,
 };
 
 /*************************************************************************
@@ -10522,41 +10418,131 @@ static ssize_t wwan_antenna_type_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(wwan_antenna_type);
 
+static struct attribute *dprc_attributes[] = {
+	&dev_attr_wwan_antenna_type.attr,
+	NULL
+};
+
+static umode_t dprc_attr_is_visible(struct kobject *kobj,
+				    struct attribute *attr, int n)
+{
+	return has_antennatype ? attr->mode : 0;
+}
+
+static const struct attribute_group dprc_attr_group = {
+	.is_visible = dprc_attr_is_visible,
+	.attrs = dprc_attributes,
+};
+
 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
 {
-	int wwanantenna_err, err;
+	int err = get_wwan_antenna(&wwan_antennatype);
 
-	wwanantenna_err = get_wwan_antenna(&wwan_antennatype);
 	/*
 	 * If support isn't available (ENODEV) then quit, but don't
 	 * return an error.
 	 */
-	if (wwanantenna_err == -ENODEV)
+	if (err == -ENODEV)
 		return 0;
 
-	/* if there was an error return it */
-	if (wwanantenna_err && (wwanantenna_err != -ENODEV))
-		return wwanantenna_err;
-	else if (!wwanantenna_err)
-		has_antennatype = true;
+	/* If there was an error return it */
+	if (err)
+		return err;
 
-	if (has_antennatype) {
-		err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_wwan_antenna_type.attr);
-		if (err)
-			return err;
-	}
+	has_antennatype = true;
 	return 0;
 }
 
-static void dprc_exit(void)
-{
-	if (has_antennatype)
-		sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_wwan_antenna_type.attr);
-}
-
 static struct ibm_struct dprc_driver_data = {
 	.name = "dprc",
-	.exit = dprc_exit,
+};
+
+/* --------------------------------------------------------------------- */
+
+static struct attribute *tpacpi_attributes[] = {
+	&driver_attr_debug_level.attr,
+	&driver_attr_version.attr,
+	&driver_attr_interface_version.attr,
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+	&driver_attr_wlsw_emulstate.attr,
+	&driver_attr_bluetooth_emulstate.attr,
+	&driver_attr_wwan_emulstate.attr,
+	&driver_attr_uwb_emulstate.attr,
+#endif
+	NULL
+};
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
+				      struct attribute *attr, int n)
+{
+	if (attr == &driver_attr_wlsw_emulstate.attr) {
+		if (!dbg_wlswemul)
+			return 0;
+	} else if (attr == &driver_attr_bluetooth_emulstate.attr) {
+		if (!dbg_bluetoothemul)
+			return 0;
+	} else if (attr == &driver_attr_wwan_emulstate.attr) {
+		if (!dbg_wwanemul)
+			return 0;
+	} else if (attr == &driver_attr_uwb_emulstate.attr) {
+		if (!dbg_uwbemul)
+			return 0;
+	}
+
+	return attr->mode;
+}
+#endif
+
+static const struct attribute_group tpacpi_attr_group = {
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+	.is_visible = tpacpi_attr_is_visible,
+#endif
+	.attrs = tpacpi_attributes,
+};
+
+static const struct attribute_group *tpacpi_groups[] = {
+	&adaptive_kbd_attr_group,
+	&hotkey_attr_group,
+	&bluetooth_attr_group,
+	&wan_attr_group,
+	&cmos_attr_group,
+	&proxsensor_attr_group,
+	&kbdlang_attr_group,
+	&dprc_attr_group,
+	&tpacpi_attr_group,
+	NULL,
+};
+
+static const struct attribute_group *tpacpi_hwmon_groups[] = {
+	&thermal_attr_group,
+	&temp_label_attr_group,
+	&fan_attr_group,
+	NULL,
+};
+
+/****************************************************************************
+ ****************************************************************************
+ *
+ * Platform drivers
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+static struct platform_driver tpacpi_pdriver = {
+	.driver = {
+		.name = TPACPI_DRVR_NAME,
+		.pm = &tpacpi_pm,
+		.dev_groups = tpacpi_groups,
+	},
+	.shutdown = tpacpi_shutdown_handler,
+};
+
+static struct platform_driver tpacpi_hwmon_pdriver = {
+	.driver = {
+		.name = TPACPI_HWMON_DRVR_NAME,
+		.dev_groups = tpacpi_hwmon_groups,
+	},
 };
 
 /****************************************************************************
@@ -11079,8 +11065,6 @@ static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
 
 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
 		ibm = ibms_init[i].data;
-		WARN_ON(ibm == NULL);
-
 		if (!ibm || !ibm->name)
 			continue;
 
@@ -11210,26 +11194,16 @@ static void thinkpad_acpi_module_exit(void)
 
 	if (tpacpi_hwmon)
 		hwmon_device_unregister(tpacpi_hwmon);
-
 	if (tpacpi_sensors_pdev)
 		platform_device_unregister(tpacpi_sensors_pdev);
 	if (tpacpi_pdev)
 		platform_device_unregister(tpacpi_pdev);
-
-	if (tp_features.sensors_pdrv_attrs_registered)
-		tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
-	if (tp_features.platform_drv_attrs_registered)
-		tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
-
 	if (tp_features.sensors_pdrv_registered)
 		platform_driver_unregister(&tpacpi_hwmon_pdriver);
-
 	if (tp_features.platform_drv_registered)
 		platform_driver_unregister(&tpacpi_pdriver);
-
 	if (proc_dir)
 		remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
-
 	if (tpacpi_wq)
 		destroy_workqueue(tpacpi_wq);
 
@@ -11297,20 +11271,6 @@ static int __init thinkpad_acpi_module_init(void)
 	}
 	tp_features.sensors_pdrv_registered = 1;
 
-	ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
-	if (!ret) {
-		tp_features.platform_drv_attrs_registered = 1;
-		ret = tpacpi_create_driver_attributes(
-					&tpacpi_hwmon_pdriver.driver);
-	}
-	if (ret) {
-		pr_err("unable to create sysfs driver attributes\n");
-		thinkpad_acpi_module_exit();
-		return ret;
-	}
-	tp_features.sensors_pdrv_attrs_registered = 1;
-
-
 	/* Device initialization */
 	tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
 							NULL, 0);

From 0f0ac158d28ff78e75c334e869b1cb8e69372a1f Mon Sep 17 00:00:00 2001
From: "Luke D. Jones" <luke@ljones.dev>
Date: Sun, 24 Oct 2021 16:37:05 +1300
Subject: [PATCH 02/78] platform/x86: asus-wmi: Add support for custom fan
 curves

Add support for custom fan curves found on some ASUS ROG laptops.

These laptops have the ability to set a custom curve for the CPU
and GPU fans via two ACPI methods.

This patch adds two pwm<N> attributes to the hwmon sysfs,
pwm1 for CPU fan, pwm2 for GPU fan. Both are under the hwmon of the
name `asus_custom_fan_curve`. There is no safety check of the set
fan curves - this must be done in userspace.

The fans have settings [1,2,3] under pwm<N>_enable:
1. Enable and write settings out
2. Disable and use factory fan mode
3. Same as 2, additionally restoring default factory curve.

Use of 2 means that the curve the user has set is still stored and
won't be erased, but the laptop will be using its default auto-fan
mode. Re-enabling the manual mode then activates the curves again.

Notes:
- pwm<N>_enable = 0 is an invalid setting.
- pwm is actually a percentage and is scaled on writing to device.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/20211024033705.5595-2-luke@ljones.dev
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/asus-wmi.c            | 567 ++++++++++++++++++++-
 include/linux/platform_data/x86/asus-wmi.h |   2 +
 2 files changed, 564 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 8f067ac4e952..ab0c087d40cf 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -106,8 +106,17 @@ module_param(fnlock_default, bool, 0444);
 
 #define WMI_EVENT_MASK			0xFFFF
 
+#define FAN_CURVE_POINTS		8
+#define FAN_CURVE_BUF_LEN		(FAN_CURVE_POINTS * 2)
+#define FAN_CURVE_DEV_CPU		0x00
+#define FAN_CURVE_DEV_GPU		0x01
+/* Mask to determine if setting temperature or percentage */
+#define FAN_CURVE_PWM_MASK		0x04
+
 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
 
+static int throttle_thermal_policy_write(struct asus_wmi *);
+
 static bool ashs_present(void)
 {
 	int i = 0;
@@ -122,7 +131,8 @@ struct bios_args {
 	u32 arg0;
 	u32 arg1;
 	u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */
-	u32 arg4;
+	u32 arg3;
+	u32 arg4; /* Some ROG laptops require a full 5 input args */
 	u32 arg5;
 } __packed;
 
@@ -173,6 +183,13 @@ enum fan_type {
 	FAN_TYPE_SPEC83,	/* starting in Spec 8.3, use CPU_FAN_CTRL */
 };
 
+struct fan_curve_data {
+	bool enabled;
+	u32 device_id;
+	u8 temps[FAN_CURVE_POINTS];
+	u8 percents[FAN_CURVE_POINTS];
+};
+
 struct asus_wmi {
 	int dsts_id;
 	int spec;
@@ -220,6 +237,10 @@ struct asus_wmi {
 	bool throttle_thermal_policy_available;
 	u8 throttle_thermal_policy_mode;
 
+	bool cpu_fan_curve_available;
+	bool gpu_fan_curve_available;
+	struct fan_curve_data custom_fan_curves[2];
+
 	struct platform_profile_handler platform_profile_handler;
 	bool platform_profile_support;
 
@@ -285,6 +306,103 @@ int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
 }
 EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
 
+static int asus_wmi_evaluate_method5(u32 method_id,
+		u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4, u32 *retval)
+{
+	struct bios_args args = {
+		.arg0 = arg0,
+		.arg1 = arg1,
+		.arg2 = arg2,
+		.arg3 = arg3,
+		.arg4 = arg4,
+	};
+	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_status status;
+	union acpi_object *obj;
+	u32 tmp = 0;
+
+	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
+				     &input, &output);
+
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	obj = (union acpi_object *)output.pointer;
+	if (obj && obj->type == ACPI_TYPE_INTEGER)
+		tmp = (u32) obj->integer.value;
+
+	if (retval)
+		*retval = tmp;
+
+	kfree(obj);
+
+	if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
+		return -ENODEV;
+
+	return 0;
+}
+
+/*
+ * Returns as an error if the method output is not a buffer. Typically this
+ * means that the method called is unsupported.
+ */
+static int asus_wmi_evaluate_method_buf(u32 method_id,
+		u32 arg0, u32 arg1, u8 *ret_buffer, size_t size)
+{
+	struct bios_args args = {
+		.arg0 = arg0,
+		.arg1 = arg1,
+		.arg2 = 0,
+	};
+	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_status status;
+	union acpi_object *obj;
+	int err = 0;
+
+	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
+				     &input, &output);
+
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	obj = (union acpi_object *)output.pointer;
+
+	switch (obj->type) {
+	case ACPI_TYPE_BUFFER:
+		if (obj->buffer.length > size)
+			err = -ENOSPC;
+		if (obj->buffer.length == 0)
+			err = -ENODATA;
+
+		memcpy(ret_buffer, obj->buffer.pointer, obj->buffer.length);
+		break;
+	case ACPI_TYPE_INTEGER:
+		err = (u32)obj->integer.value;
+
+		if (err == ASUS_WMI_UNSUPPORTED_METHOD)
+			err = -ENODEV;
+		/*
+		 * At least one method returns a 0 with no buffer if no arg
+		 * is provided, such as ASUS_WMI_DEVID_CPU_FAN_CURVE
+		 */
+		if (err == 0)
+			err = -ENODATA;
+		break;
+	default:
+		err = -ENODATA;
+		break;
+	}
+
+	kfree(obj);
+
+	if (err)
+		return err;
+
+	return 0;
+}
+
 static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
 {
 	struct acpi_buffer input;
@@ -1806,6 +1924,13 @@ static ssize_t pwm1_enable_store(struct device *dev,
 	}
 
 	asus->fan_pwm_mode = state;
+
+	/* Must set to disabled if mode is toggled */
+	if (asus->cpu_fan_curve_available)
+		asus->custom_fan_curves[FAN_CURVE_DEV_CPU].enabled = false;
+	if (asus->gpu_fan_curve_available)
+		asus->custom_fan_curves[FAN_CURVE_DEV_GPU].enabled = false;
+
 	return count;
 }
 
@@ -1953,9 +2078,9 @@ static int fan_boost_mode_check_present(struct asus_wmi *asus)
 
 static int fan_boost_mode_write(struct asus_wmi *asus)
 {
-	int err;
-	u8 value;
 	u32 retval;
+	u8 value;
+	int err;
 
 	value = asus->fan_boost_mode;
 
@@ -2013,10 +2138,10 @@ static ssize_t fan_boost_mode_store(struct device *dev,
 				    struct device_attribute *attr,
 				    const char *buf, size_t count)
 {
-	int result;
-	u8 new_mode;
 	struct asus_wmi *asus = dev_get_drvdata(dev);
 	u8 mask = asus->fan_boost_mode_mask;
+	u8 new_mode;
+	int result;
 
 	result = kstrtou8(buf, 10, &new_mode);
 	if (result < 0) {
@@ -2043,6 +2168,426 @@ static ssize_t fan_boost_mode_store(struct device *dev,
 // Fan boost mode: 0 - normal, 1 - overboost, 2 - silent
 static DEVICE_ATTR_RW(fan_boost_mode);
 
+/* Custom fan curves **********************************************************/
+
+static void fan_curve_copy_from_buf(struct fan_curve_data *data, u8 *buf)
+{
+	int i;
+
+	for (i = 0; i < FAN_CURVE_POINTS; i++) {
+		data->temps[i] = buf[i];
+	}
+
+	for (i = 0; i < FAN_CURVE_POINTS; i++) {
+		data->percents[i] =
+			255 * buf[i + FAN_CURVE_POINTS] / 100;
+	}
+}
+
+static int fan_curve_get_factory_default(struct asus_wmi *asus, u32 fan_dev)
+{
+	struct fan_curve_data *curves;
+	u8 buf[FAN_CURVE_BUF_LEN];
+	int fan_idx = 0;
+	u8 mode = 0;
+	int err;
+
+	if (asus->throttle_thermal_policy_available)
+		mode = asus->throttle_thermal_policy_mode;
+	/* DEVID_<C/G>PU_FAN_CURVE is switched for OVERBOOST vs SILENT */
+	if (mode == 2)
+		mode = 1;
+	else if (mode == 1)
+		mode = 2;
+
+	if (fan_dev == ASUS_WMI_DEVID_GPU_FAN_CURVE)
+		fan_idx = FAN_CURVE_DEV_GPU;
+
+	curves = &asus->custom_fan_curves[fan_idx];
+	err = asus_wmi_evaluate_method_buf(asus->dsts_id, fan_dev, mode, buf,
+					   FAN_CURVE_BUF_LEN);
+	if (err)
+		return err;
+
+	fan_curve_copy_from_buf(curves, buf);
+	curves->device_id = fan_dev;
+
+	return 0;
+}
+
+/* Check if capability exists, and populate defaults */
+static int fan_curve_check_present(struct asus_wmi *asus, bool *available,
+				   u32 fan_dev)
+{
+	int err;
+
+	*available = false;
+
+	err = fan_curve_get_factory_default(asus, fan_dev);
+	if (err) {
+		if (err == -ENODEV)
+			return 0;
+		return err;
+	}
+
+	*available = true;
+	return 0;
+}
+
+/* Determine which fan the attribute is for if SENSOR_ATTR */
+static struct fan_curve_data *fan_curve_attr_select(struct asus_wmi *asus,
+					      struct device_attribute *attr)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+
+	return &asus->custom_fan_curves[index & FAN_CURVE_DEV_GPU];
+}
+
+/* Determine which fan the attribute is for if SENSOR_ATTR_2 */
+static struct fan_curve_data *fan_curve_attr_2_select(struct asus_wmi *asus,
+					    struct device_attribute *attr)
+{
+	int nr = to_sensor_dev_attr_2(attr)->nr;
+
+	return &asus->custom_fan_curves[nr & FAN_CURVE_DEV_GPU];
+}
+
+static ssize_t fan_curve_show(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct sensor_device_attribute_2 *dev_attr = to_sensor_dev_attr_2(attr);
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+	struct fan_curve_data *data;
+	int value, index, nr;
+
+	data = fan_curve_attr_2_select(asus, attr);
+	index = dev_attr->index;
+	nr = dev_attr->nr;
+
+	if (nr & FAN_CURVE_PWM_MASK)
+		value = data->percents[index];
+	else
+		value = data->temps[index];
+
+	return sysfs_emit(buf, "%d\n", value);
+}
+
+/*
+ * "fan_dev" is the related WMI method such as ASUS_WMI_DEVID_CPU_FAN_CURVE.
+ */
+static int fan_curve_write(struct asus_wmi *asus,
+			   struct fan_curve_data *data)
+{
+	u32 arg1 = 0, arg2 = 0, arg3 = 0, arg4 = 0;
+	u8 *percents = data->percents;
+	u8 *temps = data->temps;
+	int ret, i, shift = 0;
+
+	if (!data->enabled)
+		return 0;
+
+	for (i = 0; i < FAN_CURVE_POINTS / 2; i++) {
+		arg1 += (temps[i]) << shift;
+		arg2 += (temps[i + 4]) << shift;
+		/* Scale to percentage for device */
+		arg3 += (100 * percents[i] / 255) << shift;
+		arg4 += (100 * percents[i + 4] / 255) << shift;
+		shift += 8;
+	}
+
+	return asus_wmi_evaluate_method5(ASUS_WMI_METHODID_DEVS,
+					 data->device_id,
+					 arg1, arg2, arg3, arg4, &ret);
+}
+
+static ssize_t fan_curve_store(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	struct sensor_device_attribute_2 *dev_attr = to_sensor_dev_attr_2(attr);
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+	struct fan_curve_data *data;
+	u8 value;
+	int err;
+
+	int pwm = dev_attr->nr & FAN_CURVE_PWM_MASK;
+	int index = dev_attr->index;
+
+	data = fan_curve_attr_2_select(asus, attr);
+
+	err = kstrtou8(buf, 10, &value);
+	if (err < 0)
+		return err;
+
+	if (pwm) {
+		data->percents[index] = value;
+	} else {
+		data->temps[index] = value;
+	}
+
+	/*
+	 * Mark as disabled so the user has to explicitly enable to apply a
+	 * changed fan curve. This prevents potential lockups from writing out
+	 * many changes as one-write-per-change.
+	 */
+	data->enabled = false;
+
+	return count;
+}
+
+static ssize_t fan_curve_enable_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+	struct fan_curve_data *data;
+	int out = 2;
+
+	data = fan_curve_attr_select(asus, attr);
+
+	if (data->enabled)
+		out = 1;
+
+	return sysfs_emit(buf, "%d\n", out);
+}
+
+static ssize_t fan_curve_enable_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+	struct fan_curve_data *data;
+	int value, err;
+
+	data = fan_curve_attr_select(asus, attr);
+
+	err = kstrtoint(buf, 10, &value);
+	if (err < 0)
+		return err;
+
+	switch (value) {
+	case 1:
+		data->enabled = true;
+		break;
+	case 2:
+		data->enabled = false;
+		break;
+	/*
+	 * Auto + reset the fan curve data to defaults. Make it an explicit
+	 * option so that users don't accidentally overwrite a set fan curve.
+	 */
+	case 3:
+		err = fan_curve_get_factory_default(asus, data->device_id);
+		if (err)
+			return err;
+		data->enabled = false;
+		break;
+	default:
+		return -EINVAL;
+	};
+
+	if (data->enabled) {
+		err = fan_curve_write(asus, data);
+		if (err)
+			return err;
+	} else {
+		/*
+		 * For machines with throttle this is the only way to reset fans
+		 * to default mode of operation (does not erase curve data).
+		 */
+		if (asus->throttle_thermal_policy_available) {
+			err = throttle_thermal_policy_write(asus);
+			if (err)
+				return err;
+		/* Similar is true for laptops with this fan */
+		} else if (asus->fan_type == FAN_TYPE_SPEC83) {
+			err = asus_fan_set_auto(asus);
+			if (err)
+				return err;
+		} else {
+			/* Safeguard against fautly ACPI tables */
+			err = fan_curve_get_factory_default(asus, data->device_id);
+			if (err)
+				return err;
+			err = fan_curve_write(asus, data);
+			if (err)
+				return err;
+		}
+	}
+	return count;
+}
+
+/* CPU */
+static SENSOR_DEVICE_ATTR_RW(pwm1_enable, fan_curve_enable, FAN_CURVE_DEV_CPU);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 0);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 1);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 2);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 3);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 4);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point6_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 5);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point7_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 6);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point8_temp, fan_curve,
+			       FAN_CURVE_DEV_CPU, 7);
+
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 0);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 1);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 2);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 3);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 4);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point6_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 5);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point7_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 6);
+static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point8_pwm, fan_curve,
+			       FAN_CURVE_DEV_CPU | FAN_CURVE_PWM_MASK, 7);
+
+/* GPU */
+static SENSOR_DEVICE_ATTR_RW(pwm2_enable, fan_curve_enable, FAN_CURVE_DEV_GPU);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 0);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 1);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 2);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 3);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 4);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point6_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 5);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point7_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 6);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point8_temp, fan_curve,
+			       FAN_CURVE_DEV_GPU, 7);
+
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 0);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 1);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 2);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 3);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 4);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point6_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 5);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point7_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 6);
+static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point8_pwm, fan_curve,
+			       FAN_CURVE_DEV_GPU | FAN_CURVE_PWM_MASK, 7);
+
+static struct attribute *asus_fan_curve_attr[] = {
+	/* CPU */
+	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
+	/* GPU */
+	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point6_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point7_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point8_temp.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point6_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point7_pwm.dev_attr.attr,
+	&sensor_dev_attr_pwm2_auto_point8_pwm.dev_attr.attr,
+	NULL
+};
+
+static umode_t asus_fan_curve_is_visible(struct kobject *kobj,
+					 struct attribute *attr, int idx)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct asus_wmi *asus = dev_get_drvdata(dev->parent);
+
+	/*
+	 * Check the char instead of casting attr as there are two attr types
+	 * involved here (attr1 and attr2)
+	 */
+	if (asus->cpu_fan_curve_available && attr->name[3] == '1')
+		return 0644;
+
+	if (asus->gpu_fan_curve_available && attr->name[3] == '2')
+		return 0644;
+
+	return 0;
+}
+
+static const struct attribute_group asus_fan_curve_attr_group = {
+	.is_visible = asus_fan_curve_is_visible,
+	.attrs = asus_fan_curve_attr,
+};
+__ATTRIBUTE_GROUPS(asus_fan_curve_attr);
+
+/*
+ * Must be initialised after throttle_thermal_policy_check_present() as
+ * we check the status of throttle_thermal_policy_available during init.
+ */
+static int asus_wmi_custom_fan_curve_init(struct asus_wmi *asus)
+{
+	struct device *dev = &asus->platform_device->dev;
+	struct device *hwmon;
+	int err;
+
+	err = fan_curve_check_present(asus, &asus->cpu_fan_curve_available,
+				      ASUS_WMI_DEVID_CPU_FAN_CURVE);
+	if (err)
+		return err;
+
+	err = fan_curve_check_present(asus, &asus->gpu_fan_curve_available,
+				      ASUS_WMI_DEVID_GPU_FAN_CURVE);
+	if (err)
+		return err;
+
+	if (!asus->cpu_fan_curve_available && !asus->gpu_fan_curve_available)
+		return 0;
+
+	hwmon = devm_hwmon_device_register_with_groups(
+		dev, "asus_custom_fan_curve", asus, asus_fan_curve_attr_groups);
+
+	if (IS_ERR(hwmon)) {
+		dev_err(dev,
+			"Could not register asus_custom_fan_curve device\n");
+		return PTR_ERR(hwmon);
+	}
+
+	return 0;
+}
+
 /* Throttle thermal policy ****************************************************/
 
 static int throttle_thermal_policy_check_present(struct asus_wmi *asus)
@@ -2092,6 +2637,12 @@ static int throttle_thermal_policy_write(struct asus_wmi *asus)
 		return -EIO;
 	}
 
+	/* Must set to disabled if mode is toggled */
+	if (asus->cpu_fan_curve_available)
+		asus->custom_fan_curves[FAN_CURVE_DEV_CPU].enabled = false;
+	if (asus->gpu_fan_curve_available)
+		asus->custom_fan_curves[FAN_CURVE_DEV_GPU].enabled = false;
+
 	return 0;
 }
 
@@ -3035,6 +3586,10 @@ static int asus_wmi_add(struct platform_device *pdev)
 	if (err)
 		goto fail_hwmon;
 
+	err = asus_wmi_custom_fan_curve_init(asus);
+	if (err)
+		goto fail_custom_fan_curve;
+
 	err = asus_wmi_led_init(asus);
 	if (err)
 		goto fail_leds;
@@ -3106,6 +3661,7 @@ fail_input:
 	asus_wmi_sysfs_exit(asus->platform_device);
 fail_sysfs:
 fail_throttle_thermal_policy:
+fail_custom_fan_curve:
 fail_platform_profile_setup:
 	if (asus->platform_profile_support)
 		platform_profile_remove();
@@ -3131,6 +3687,7 @@ static int asus_wmi_remove(struct platform_device *device)
 	asus_wmi_debugfs_exit(asus);
 	asus_wmi_sysfs_exit(asus->platform_device);
 	asus_fan_set_auto(asus);
+	throttle_thermal_policy_set_default(asus);
 	asus_wmi_battery_exit(asus);
 
 	if (asus->platform_profile_support)
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 17dc5cb6f3f2..a571b47ff362 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -77,6 +77,8 @@
 #define ASUS_WMI_DEVID_THERMAL_CTRL	0x00110011
 #define ASUS_WMI_DEVID_FAN_CTRL		0x00110012 /* deprecated */
 #define ASUS_WMI_DEVID_CPU_FAN_CTRL	0x00110013
+#define ASUS_WMI_DEVID_CPU_FAN_CURVE	0x00110024
+#define ASUS_WMI_DEVID_GPU_FAN_CURVE	0x00110025
 
 /* Power */
 #define ASUS_WMI_DEVID_PROCESSOR_STATE	0x00120012

From 38543b72fbe52b7eec0dedd420d80a06c652d8e4 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Thu, 28 Oct 2021 02:22:41 +0200
Subject: [PATCH 03/78] platform/surface: aggregator: Make client device
 removal more generic

Currently, there are similar functions defined in the Aggregator
Registry and the controller core.

Make client device removal more generic and export it. We can then use
this function later on to remove client devices from device hubs as well
as the controller and avoid re-defining similar things.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20211028002243.1586083-2-luzmaximilian@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/surface/aggregator/bus.c  | 24 ++++++++--------------
 drivers/platform/surface/aggregator/bus.h  |  3 ---
 drivers/platform/surface/aggregator/core.c |  3 ++-
 include/linux/surface_aggregator/device.h  |  9 ++++++++
 4 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/platform/surface/aggregator/bus.c b/drivers/platform/surface/aggregator/bus.c
index 0a40dd9c94ed..abbbb5b08b07 100644
--- a/drivers/platform/surface/aggregator/bus.c
+++ b/drivers/platform/surface/aggregator/bus.c
@@ -374,27 +374,19 @@ static int ssam_remove_device(struct device *dev, void *_data)
 }
 
 /**
- * ssam_controller_remove_clients() - Remove SSAM client devices registered as
- * direct children under the given controller.
- * @ctrl: The controller to remove all direct clients for.
+ * ssam_remove_clients() - Remove SSAM client devices registered as direct
+ * children under the given parent device.
+ * @dev: The (parent) device to remove all direct clients for.
  *
- * Remove all SSAM client devices registered as direct children under the
- * given controller. Note that this only accounts for direct children of the
- * controller device. This does not take care of any client devices where the
- * parent device has been manually set before calling ssam_device_add. Refer
- * to ssam_device_add()/ssam_device_remove() for more details on those cases.
- *
- * To avoid new devices being added in parallel to this call, the main
- * controller lock (not statelock) must be held during this (and if
- * necessary, any subsequent deinitialization) call.
+ * Remove all SSAM client devices registered as direct children under the given
+ * device. Note that this only accounts for direct children of the device.
+ * Refer to ssam_device_add()/ssam_device_remove() for more details.
  */
-void ssam_controller_remove_clients(struct ssam_controller *ctrl)
+void ssam_remove_clients(struct device *dev)
 {
-	struct device *dev;
-
-	dev = ssam_controller_device(ctrl);
 	device_for_each_child_reverse(dev, NULL, ssam_remove_device);
 }
+EXPORT_SYMBOL_GPL(ssam_remove_clients);
 
 /**
  * ssam_bus_register() - Register and set-up the SSAM client device bus.
diff --git a/drivers/platform/surface/aggregator/bus.h b/drivers/platform/surface/aggregator/bus.h
index ed032c2cbdb2..6964ee84e79c 100644
--- a/drivers/platform/surface/aggregator/bus.h
+++ b/drivers/platform/surface/aggregator/bus.h
@@ -12,14 +12,11 @@
 
 #ifdef CONFIG_SURFACE_AGGREGATOR_BUS
 
-void ssam_controller_remove_clients(struct ssam_controller *ctrl);
-
 int ssam_bus_register(void);
 void ssam_bus_unregister(void);
 
 #else /* CONFIG_SURFACE_AGGREGATOR_BUS */
 
-static inline void ssam_controller_remove_clients(struct ssam_controller *ctrl) {}
 static inline int ssam_bus_register(void) { return 0; }
 static inline void ssam_bus_unregister(void) {}
 
diff --git a/drivers/platform/surface/aggregator/core.c b/drivers/platform/surface/aggregator/core.c
index c61bbeeec2df..d384d36098c2 100644
--- a/drivers/platform/surface/aggregator/core.c
+++ b/drivers/platform/surface/aggregator/core.c
@@ -22,6 +22,7 @@
 #include <linux/sysfs.h>
 
 #include <linux/surface_aggregator/controller.h>
+#include <linux/surface_aggregator/device.h>
 
 #include "bus.h"
 #include "controller.h"
@@ -735,7 +736,7 @@ static void ssam_serial_hub_remove(struct serdev_device *serdev)
 	ssam_controller_lock(ctrl);
 
 	/* Remove all client devices. */
-	ssam_controller_remove_clients(ctrl);
+	ssam_remove_clients(&serdev->dev);
 
 	/* Act as if suspending to silence events. */
 	status = ssam_ctrl_notif_display_off(ctrl);
diff --git a/include/linux/surface_aggregator/device.h b/include/linux/surface_aggregator/device.h
index f636c5310321..cc257097eb05 100644
--- a/include/linux/surface_aggregator/device.h
+++ b/include/linux/surface_aggregator/device.h
@@ -319,6 +319,15 @@ void ssam_device_driver_unregister(struct ssam_device_driver *d);
 		      ssam_device_driver_unregister)
 
 
+/* -- Helpers for controller and hub devices. ------------------------------- */
+
+#ifdef CONFIG_SURFACE_AGGREGATOR_BUS
+void ssam_remove_clients(struct device *dev);
+#else /* CONFIG_SURFACE_AGGREGATOR_BUS */
+static inline void ssam_remove_clients(struct device *dev) {}
+#endif /* CONFIG_SURFACE_AGGREGATOR_BUS */
+
+
 /* -- Helpers for client-device requests. ----------------------------------- */
 
 /**

From acff7091df0eae74fe40917b961588a444d1d60e Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Thu, 28 Oct 2021 02:22:42 +0200
Subject: [PATCH 04/78] platform/surface: aggregator_registry: Use generic
 client removal function

Use generic client removal function introduced in the previous commit
instead of defining our own one.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20211028002243.1586083-3-luzmaximilian@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 .../surface/surface_aggregator_registry.c     | 24 ++++---------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c
index e70f4c63554e..f6c639342b9d 100644
--- a/drivers/platform/surface/surface_aggregator_registry.c
+++ b/drivers/platform/surface/surface_aggregator_registry.c
@@ -258,20 +258,6 @@ static int ssam_uid_from_string(const char *str, struct ssam_device_uid *uid)
 	return 0;
 }
 
-static int ssam_hub_remove_devices_fn(struct device *dev, void *data)
-{
-	if (!is_ssam_device(dev))
-		return 0;
-
-	ssam_device_remove(to_ssam_device(dev));
-	return 0;
-}
-
-static void ssam_hub_remove_devices(struct device *parent)
-{
-	device_for_each_child_reverse(parent, NULL, ssam_hub_remove_devices_fn);
-}
-
 static int ssam_hub_add_device(struct device *parent, struct ssam_controller *ctrl,
 			       struct fwnode_handle *node)
 {
@@ -317,7 +303,7 @@ static int ssam_hub_add_devices(struct device *parent, struct ssam_controller *c
 
 	return 0;
 err:
-	ssam_hub_remove_devices(parent);
+	ssam_remove_clients(parent);
 	return status;
 }
 
@@ -414,7 +400,7 @@ static void ssam_base_hub_update_workfn(struct work_struct *work)
 	if (hub->state == SSAM_BASE_HUB_CONNECTED)
 		status = ssam_hub_add_devices(&hub->sdev->dev, hub->sdev->ctrl, node);
 	else
-		ssam_hub_remove_devices(&hub->sdev->dev);
+		ssam_remove_clients(&hub->sdev->dev);
 
 	if (status)
 		dev_err(&hub->sdev->dev, "failed to update base-hub devices: %d\n", status);
@@ -496,7 +482,7 @@ static int ssam_base_hub_probe(struct ssam_device *sdev)
 err:
 	ssam_notifier_unregister(sdev->ctrl, &hub->notif);
 	cancel_delayed_work_sync(&hub->update_work);
-	ssam_hub_remove_devices(&sdev->dev);
+	ssam_remove_clients(&sdev->dev);
 	return status;
 }
 
@@ -508,7 +494,7 @@ static void ssam_base_hub_remove(struct ssam_device *sdev)
 
 	ssam_notifier_unregister(sdev->ctrl, &hub->notif);
 	cancel_delayed_work_sync(&hub->update_work);
-	ssam_hub_remove_devices(&sdev->dev);
+	ssam_remove_clients(&sdev->dev);
 }
 
 static const struct ssam_device_id ssam_base_hub_match[] = {
@@ -625,7 +611,7 @@ static int ssam_platform_hub_remove(struct platform_device *pdev)
 {
 	const struct software_node **nodes = platform_get_drvdata(pdev);
 
-	ssam_hub_remove_devices(&pdev->dev);
+	ssam_remove_clients(&pdev->dev);
 	set_secondary_fwnode(&pdev->dev, NULL);
 	software_node_unregister_node_group(nodes);
 	return 0;

From b3c3d5881e0ede0526fc996c98949cffac697295 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Thu, 28 Oct 2021 02:22:43 +0200
Subject: [PATCH 05/78] platform/surface: aggregator_registry: Rename device
 registration function

Rename the device registration function to better align names with the
newly introduced device removal function.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20211028002243.1586083-4-luzmaximilian@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/surface/surface_aggregator_registry.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c
index f6c639342b9d..ce2bd88feeaa 100644
--- a/drivers/platform/surface/surface_aggregator_registry.c
+++ b/drivers/platform/surface/surface_aggregator_registry.c
@@ -283,8 +283,8 @@ static int ssam_hub_add_device(struct device *parent, struct ssam_controller *ct
 	return status;
 }
 
-static int ssam_hub_add_devices(struct device *parent, struct ssam_controller *ctrl,
-				struct fwnode_handle *node)
+static int ssam_hub_register_clients(struct device *parent, struct ssam_controller *ctrl,
+				     struct fwnode_handle *node)
 {
 	struct fwnode_handle *child;
 	int status;
@@ -398,7 +398,7 @@ static void ssam_base_hub_update_workfn(struct work_struct *work)
 	hub->state = state;
 
 	if (hub->state == SSAM_BASE_HUB_CONNECTED)
-		status = ssam_hub_add_devices(&hub->sdev->dev, hub->sdev->ctrl, node);
+		status = ssam_hub_register_clients(&hub->sdev->dev, hub->sdev->ctrl, node);
 	else
 		ssam_remove_clients(&hub->sdev->dev);
 
@@ -597,7 +597,7 @@ static int ssam_platform_hub_probe(struct platform_device *pdev)
 
 	set_secondary_fwnode(&pdev->dev, root);
 
-	status = ssam_hub_add_devices(&pdev->dev, ctrl, root);
+	status = ssam_hub_register_clients(&pdev->dev, ctrl, root);
 	if (status) {
 		set_secondary_fwnode(&pdev->dev, NULL);
 		software_node_unregister_node_group(nodes);

From adca4b68713f3c2f9fc1b2b529296a5da6f1eb4b Mon Sep 17 00:00:00 2001
From: Mark Pearson <markpearson@lenovo.com>
Date: Wed, 17 Nov 2021 13:44:52 -0500
Subject: [PATCH 06/78] Documentation: syfs-class-firmware-attributes: Lenovo
 Opcode support

Newer Lenovo BIOS's have an opcode GUID support interface which provides
 - improved password setting control
 - ability to set System, hard drive and NVMe passwords

Add the support for these new passwords, and the ability to select
user/master mode and the drive index.

Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Link: https://lore.kernel.org/r/20211117184453.2476-1-markpearson@lenovo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 .../testing/sysfs-class-firmware-attributes   | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-firmware-attributes b/Documentation/ABI/testing/sysfs-class-firmware-attributes
index 90fdf935aa5e..13e31c6a0e9c 100644
--- a/Documentation/ABI/testing/sysfs-class-firmware-attributes
+++ b/Documentation/ABI/testing/sysfs-class-firmware-attributes
@@ -161,6 +161,15 @@ Description:
 						power-on:
 							Representing a password required to use
 							the system
+						system-mgmt:
+							Representing System Management password.
+							See Lenovo extensions section for details
+						HDD:
+							Representing HDD password
+							See Lenovo extensions section for details
+						NVMe:
+							Representing NVMe password
+							See Lenovo extensions section for details
 
 		mechanism:
 					The means of authentication.  This attribute is mandatory.
@@ -207,6 +216,13 @@ Description:
 
 		On Lenovo systems the following additional settings are available:
 
+		role: system-mgmt	This gives the same authority as the bios-admin password to control
+					security related features. The authorities allocated can be set via
+					the BIOS menu SMP Access Control Policy
+
+		role: HDD & NVMe	This password is used to unlock access to the drive at boot. Note see
+					'level' and 'index' extensions below.
+
 		lenovo_encoding:
 					The encoding method that is used. This can be either "ascii"
 					or "scancode". Default is set to "ascii"
@@ -216,6 +232,22 @@ Description:
 					two char code (e.g. "us", "fr", "gr") and may vary per platform.
 					Default is set to "us"
 
+		level:
+					Available for HDD and NVMe authentication to set 'user' or 'master'
+					privilege level.
+					If only the user password is configured then this should be used to
+					unlock the drive at boot. If both master and user passwords are set
+					then either can be used. If a master password is set a user password
+					is required.
+					This attribute defaults to 'user' level
+
+		index:
+					Used with HDD and NVME authentication to set the drive index
+					that is being referenced (e.g hdd0, hdd1 etc)
+					This attribute defaults to device 0.
+
+
+
 What:		/sys/class/firmware-attributes/*/attributes/pending_reboot
 Date:		February 2021
 KernelVersion:	5.11

From 640a5fa50a42b99bfa2a0ec51b4ea9591d9bd055 Mon Sep 17 00:00:00 2001
From: Mark Pearson <markpearson@lenovo.com>
Date: Wed, 17 Nov 2021 13:44:53 -0500
Subject: [PATCH 07/78] platform/x86: think-lmi: Opcode support

Implement Opcode support.
This is available on ThinkCenter and ThinkStations platforms and
gives improved password setting capabilities

Add options to configure System, HDD & NVMe passwords.
HDD & NVMe passwords need a user level (user/master) along with
drive index.

Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Link: https://lore.kernel.org/r/20211117184453.2476-2-markpearson@lenovo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/think-lmi.c | 320 +++++++++++++++++++++++++++----
 drivers/platform/x86/think-lmi.h |  28 ++-
 2 files changed, 311 insertions(+), 37 deletions(-)

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index c4d9c45350f7..fee9e004161f 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -128,8 +128,23 @@ MODULE_PARM_DESC(debug_support, "Enable debug command support");
  */
 #define LENOVO_DEBUG_CMD_GUID "7FF47003-3B6C-4E5E-A227-E979824A85D1"
 
+/*
+ * Name:
+ *  Lenovo_OpcodeIF
+ * Description:
+ *  Opcode interface which provides the ability to set multiple
+ *  parameters and then trigger an action with a final command.
+ *  This is particularly useful for simplifying setting passwords.
+ *  With this support comes the ability to set System, HDD and NVMe
+ *  passwords.
+ *  This is currently available on ThinkCenter and ThinkStations platforms
+ */
+#define LENOVO_OPCODE_IF_GUID "DFDDEF2C-57D4-48ce-B196-0FB787D90836"
+
 #define TLMI_POP_PWD (1 << 0)
 #define TLMI_PAP_PWD (1 << 1)
+#define TLMI_HDD_PWD (1 << 2)
+#define TLMI_SYS_PWD (1 << 3)
 #define to_tlmi_pwd_setting(kobj)  container_of(kobj, struct tlmi_pwd_setting, kobj)
 #define to_tlmi_attr_setting(kobj)  container_of(kobj, struct tlmi_attr_setting, kobj)
 
@@ -145,6 +160,10 @@ static const char * const encoding_options[] = {
 	[TLMI_ENCODING_ASCII] = "ascii",
 	[TLMI_ENCODING_SCANCODE] = "scancode",
 };
+static const char * const level_options[] = {
+	[TLMI_LEVEL_USER] = "user",
+	[TLMI_LEVEL_MASTER] = "master",
+};
 static struct think_lmi tlmi_priv;
 static struct class *fw_attr_class;
 
@@ -233,6 +252,7 @@ static int tlmi_get_pwd_settings(struct tlmi_pwdcfg *pwdcfg)
 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 	const union acpi_object *obj;
 	acpi_status status;
+	int copy_size;
 
 	if (!tlmi_priv.can_get_password_settings)
 		return -EOPNOTSUPP;
@@ -253,14 +273,21 @@ static int tlmi_get_pwd_settings(struct tlmi_pwdcfg *pwdcfg)
 	 * The size of thinkpad_wmi_pcfg on ThinkStation is larger than ThinkPad.
 	 * To make the driver compatible on different brands, we permit it to get
 	 * the data in below case.
+	 * Settings must have at minimum the core fields available
 	 */
-	if (obj->buffer.length < sizeof(struct tlmi_pwdcfg)) {
+	if (obj->buffer.length < sizeof(struct tlmi_pwdcfg_core)) {
 		pr_warn("Unknown pwdcfg buffer length %d\n", obj->buffer.length);
 		kfree(obj);
 		return -EIO;
 	}
-	memcpy(pwdcfg, obj->buffer.pointer, sizeof(struct tlmi_pwdcfg));
+
+	copy_size = obj->buffer.length < sizeof(struct tlmi_pwdcfg) ?
+		obj->buffer.length : sizeof(struct tlmi_pwdcfg);
+	memcpy(pwdcfg, obj->buffer.pointer, copy_size);
 	kfree(obj);
+
+	if (WARN_ON(pwdcfg->core.max_length >= TLMI_PWD_BUFSIZE))
+		pwdcfg->core.max_length = TLMI_PWD_BUFSIZE - 1;
 	return 0;
 }
 
@@ -270,6 +297,20 @@ static int tlmi_save_bios_settings(const char *password)
 				password);
 }
 
+static int tlmi_opcode_setting(char *setting, const char *value)
+{
+	char *opcode_str;
+	int ret;
+
+	opcode_str = kasprintf(GFP_KERNEL, "%s:%s;", setting, value);
+	if (!opcode_str)
+		return -ENOMEM;
+
+	ret = tlmi_simple_call(LENOVO_OPCODE_IF_GUID, opcode_str);
+	kfree(opcode_str);
+	return ret;
+}
+
 static int tlmi_setting(int item, char **value, const char *guid_string)
 {
 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -370,16 +411,54 @@ static ssize_t new_password_store(struct kobject *kobj,
 		goto out;
 	}
 
-	/* Format: 'PasswordType,CurrentPw,NewPw,Encoding,KbdLang;' */
-	auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s,%s,%s;",
-		 setting->pwd_type, setting->password, new_pwd,
-		 encoding_options[setting->encoding], setting->kbdlang);
-	if (!auth_str) {
-		ret = -ENOMEM;
-		goto out;
+	/* If opcode support is present use that interface */
+	if (tlmi_priv.opcode_support) {
+		char pwd_type[8];
+
+		/* Special handling required for HDD and NVMe passwords */
+		if (setting == tlmi_priv.pwd_hdd) {
+			if (setting->level == TLMI_LEVEL_USER)
+				sprintf(pwd_type, "uhdp%d", setting->index);
+			else
+				sprintf(pwd_type, "mhdp%d", setting->index);
+		} else if (setting == tlmi_priv.pwd_nvme) {
+			if (setting->level == TLMI_LEVEL_USER)
+				sprintf(pwd_type, "unvp%d", setting->index);
+			else
+				sprintf(pwd_type, "mnvp%d", setting->index);
+		} else {
+			sprintf(pwd_type, "%s", setting->pwd_type);
+		}
+
+		ret = tlmi_opcode_setting("WmiOpcodePasswordType", pwd_type);
+		if (ret)
+			goto out;
+
+		if (tlmi_priv.pwd_admin->valid) {
+			ret = tlmi_opcode_setting("WmiOpcodePasswordAdmin",
+					tlmi_priv.pwd_admin->password);
+			if (ret)
+				goto out;
+		}
+		ret = tlmi_opcode_setting("WmiOpcodePasswordCurrent01", setting->password);
+		if (ret)
+			goto out;
+		ret = tlmi_opcode_setting("WmiOpcodePasswordNew01", new_pwd);
+		if (ret)
+			goto out;
+		ret = tlmi_simple_call(LENOVO_OPCODE_IF_GUID, "WmiOpcodePasswordSetUpdate;");
+	} else {
+		/* Format: 'PasswordType,CurrentPw,NewPw,Encoding,KbdLang;' */
+		auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s,%s,%s;",
+				setting->pwd_type, setting->password, new_pwd,
+				encoding_options[setting->encoding], setting->kbdlang);
+		if (!auth_str) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		ret = tlmi_simple_call(LENOVO_SET_BIOS_PASSWORD_GUID, auth_str);
+		kfree(auth_str);
 	}
-	ret = tlmi_simple_call(LENOVO_SET_BIOS_PASSWORD_GUID, auth_str);
-	kfree(auth_str);
 out:
 	kfree(new_pwd);
 	return ret ?: count;
@@ -475,6 +554,75 @@ static ssize_t role_show(struct kobject *kobj, struct kobj_attribute *attr,
 }
 static struct kobj_attribute auth_role = __ATTR_RO(role);
 
+static ssize_t index_show(struct kobject *kobj, struct kobj_attribute *attr,
+			 char *buf)
+{
+	struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+
+	return sysfs_emit(buf, "%d\n", setting->index);
+}
+
+static ssize_t index_store(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+	int err, val;
+
+	err = kstrtoint(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	if (val > TLMI_INDEX_MAX)
+		return -EINVAL;
+
+	setting->index = val;
+	return count;
+}
+
+static struct kobj_attribute auth_index = __ATTR_RW(index);
+
+static ssize_t level_show(struct kobject *kobj, struct kobj_attribute *attr,
+			 char *buf)
+{
+	struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+
+	return sysfs_emit(buf, "%s\n", level_options[setting->level]);
+}
+
+static ssize_t level_store(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+	int i;
+
+	/* Scan for a matching profile */
+	i = sysfs_match_string(level_options, buf);
+	if (i < 0)
+		return -EINVAL;
+
+	setting->level = i;
+	return count;
+}
+
+static struct kobj_attribute auth_level = __ATTR_RW(level);
+
+static umode_t auth_attr_is_visible(struct kobject *kobj,
+					     struct attribute *attr, int n)
+{
+	struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+
+	/*We only want to display level and index settings on HDD/NVMe */
+	if ((attr == (struct attribute *)&auth_index) ||
+			(attr == (struct attribute *)&auth_level)) {
+		if ((setting == tlmi_priv.pwd_hdd) || (setting == tlmi_priv.pwd_nvme))
+			return attr->mode;
+		return 0;
+	}
+	return attr->mode;
+}
+
 static struct attribute *auth_attrs[] = {
 	&auth_is_pass_set.attr,
 	&auth_min_pass_length.attr,
@@ -485,10 +633,13 @@ static struct attribute *auth_attrs[] = {
 	&auth_mechanism.attr,
 	&auth_encoding.attr,
 	&auth_kbdlang.attr,
+	&auth_index.attr,
+	&auth_level.attr,
 	NULL
 };
 
 static const struct attribute_group auth_attr_group = {
+	.is_visible = auth_attr_is_visible,
 	.attrs = auth_attrs,
 };
 
@@ -752,6 +903,16 @@ static void tlmi_release_attr(void)
 	kobject_put(&tlmi_priv.pwd_admin->kobj);
 	sysfs_remove_group(&tlmi_priv.pwd_power->kobj, &auth_attr_group);
 	kobject_put(&tlmi_priv.pwd_power->kobj);
+
+	if (tlmi_priv.opcode_support) {
+		sysfs_remove_group(&tlmi_priv.pwd_system->kobj, &auth_attr_group);
+		kobject_put(&tlmi_priv.pwd_system->kobj);
+		sysfs_remove_group(&tlmi_priv.pwd_hdd->kobj, &auth_attr_group);
+		kobject_put(&tlmi_priv.pwd_hdd->kobj);
+		sysfs_remove_group(&tlmi_priv.pwd_nvme->kobj, &auth_attr_group);
+		kobject_put(&tlmi_priv.pwd_nvme->kobj);
+	}
+
 	kset_unregister(tlmi_priv.authentication_kset);
 }
 
@@ -831,7 +992,7 @@ static int tlmi_sysfs_init(void)
 		goto fail_create_attr;
 
 	tlmi_priv.pwd_power->kobj.kset = tlmi_priv.authentication_kset;
-	ret = kobject_add(&tlmi_priv.pwd_power->kobj, NULL, "%s", "System");
+	ret = kobject_add(&tlmi_priv.pwd_power->kobj, NULL, "%s", "Power-on");
 	if (ret)
 		goto fail_create_attr;
 
@@ -839,6 +1000,35 @@ static int tlmi_sysfs_init(void)
 	if (ret)
 		goto fail_create_attr;
 
+	if (tlmi_priv.opcode_support) {
+		tlmi_priv.pwd_system->kobj.kset = tlmi_priv.authentication_kset;
+		ret = kobject_add(&tlmi_priv.pwd_system->kobj, NULL, "%s", "System");
+		if (ret)
+			goto fail_create_attr;
+
+		ret = sysfs_create_group(&tlmi_priv.pwd_system->kobj, &auth_attr_group);
+		if (ret)
+			goto fail_create_attr;
+
+		tlmi_priv.pwd_hdd->kobj.kset = tlmi_priv.authentication_kset;
+		ret = kobject_add(&tlmi_priv.pwd_hdd->kobj, NULL, "%s", "HDD");
+		if (ret)
+			goto fail_create_attr;
+
+		ret = sysfs_create_group(&tlmi_priv.pwd_hdd->kobj, &auth_attr_group);
+		if (ret)
+			goto fail_create_attr;
+
+		tlmi_priv.pwd_nvme->kobj.kset = tlmi_priv.authentication_kset;
+		ret = kobject_add(&tlmi_priv.pwd_nvme->kobj, NULL, "%s", "NVMe");
+		if (ret)
+			goto fail_create_attr;
+
+		ret = sysfs_create_group(&tlmi_priv.pwd_nvme->kobj, &auth_attr_group);
+		if (ret)
+			goto fail_create_attr;
+	}
+
 	return ret;
 
 fail_create_attr:
@@ -851,9 +1041,27 @@ fail_class_created:
 }
 
 /* ---- Base Driver -------------------------------------------------------- */
+static struct tlmi_pwd_setting *tlmi_create_auth(const char *pwd_type,
+			    const char *pwd_role)
+{
+	struct tlmi_pwd_setting *new_pwd;
+
+	new_pwd = kzalloc(sizeof(struct tlmi_pwd_setting), GFP_KERNEL);
+	if (!new_pwd)
+		return NULL;
+
+	strscpy(new_pwd->kbdlang, "us", TLMI_LANG_MAXLEN);
+	new_pwd->encoding = TLMI_ENCODING_ASCII;
+	new_pwd->pwd_type = pwd_type;
+	new_pwd->role = pwd_role;
+	new_pwd->minlen = tlmi_priv.pwdcfg.core.min_length;
+	new_pwd->maxlen = tlmi_priv.pwdcfg.core.max_length;
+	new_pwd->index = 0;
+	return new_pwd;
+}
+
 static int tlmi_analyze(void)
 {
-	struct tlmi_pwdcfg pwdcfg;
 	acpi_status status;
 	int i, ret;
 
@@ -873,6 +1081,9 @@ static int tlmi_analyze(void)
 	if (wmi_has_guid(LENOVO_DEBUG_CMD_GUID))
 		tlmi_priv.can_debug_cmd = true;
 
+	if (wmi_has_guid(LENOVO_OPCODE_IF_GUID))
+		tlmi_priv.opcode_support = true;
+
 	/*
 	 * Try to find the number of valid settings of this machine
 	 * and use it to create sysfs attributes.
@@ -923,49 +1134,81 @@ static int tlmi_analyze(void)
 	}
 
 	/* Create password setting structure */
-	ret = tlmi_get_pwd_settings(&pwdcfg);
+	ret = tlmi_get_pwd_settings(&tlmi_priv.pwdcfg);
 	if (ret)
 		goto fail_clear_attr;
 
-	tlmi_priv.pwd_admin = kzalloc(sizeof(struct tlmi_pwd_setting), GFP_KERNEL);
+	tlmi_priv.pwd_admin = tlmi_create_auth("pap", "bios-admin");
 	if (!tlmi_priv.pwd_admin) {
 		ret = -ENOMEM;
 		goto fail_clear_attr;
 	}
-	strscpy(tlmi_priv.pwd_admin->kbdlang, "us", TLMI_LANG_MAXLEN);
-	tlmi_priv.pwd_admin->encoding = TLMI_ENCODING_ASCII;
-	tlmi_priv.pwd_admin->pwd_type = "pap";
-	tlmi_priv.pwd_admin->role = "bios-admin";
-	tlmi_priv.pwd_admin->minlen = pwdcfg.min_length;
-	if (WARN_ON(pwdcfg.max_length >= TLMI_PWD_BUFSIZE))
-		pwdcfg.max_length = TLMI_PWD_BUFSIZE - 1;
-	tlmi_priv.pwd_admin->maxlen = pwdcfg.max_length;
-	if (pwdcfg.password_state & TLMI_PAP_PWD)
+	if (tlmi_priv.pwdcfg.core.password_state & TLMI_PAP_PWD)
 		tlmi_priv.pwd_admin->valid = true;
 
 	kobject_init(&tlmi_priv.pwd_admin->kobj, &tlmi_pwd_setting_ktype);
 
-	tlmi_priv.pwd_power = kzalloc(sizeof(struct tlmi_pwd_setting), GFP_KERNEL);
+	tlmi_priv.pwd_power = tlmi_create_auth("pop", "power-on");
 	if (!tlmi_priv.pwd_power) {
 		ret = -ENOMEM;
-		goto fail_free_pwd_admin;
+		goto fail_clear_attr;
 	}
-	strscpy(tlmi_priv.pwd_power->kbdlang, "us", TLMI_LANG_MAXLEN);
-	tlmi_priv.pwd_power->encoding = TLMI_ENCODING_ASCII;
-	tlmi_priv.pwd_power->pwd_type = "pop";
-	tlmi_priv.pwd_power->role = "power-on";
-	tlmi_priv.pwd_power->minlen = pwdcfg.min_length;
-	tlmi_priv.pwd_power->maxlen = pwdcfg.max_length;
-
-	if (pwdcfg.password_state & TLMI_POP_PWD)
+	if (tlmi_priv.pwdcfg.core.password_state & TLMI_POP_PWD)
 		tlmi_priv.pwd_power->valid = true;
 
 	kobject_init(&tlmi_priv.pwd_power->kobj, &tlmi_pwd_setting_ktype);
 
+	if (tlmi_priv.opcode_support) {
+		tlmi_priv.pwd_system = tlmi_create_auth("sys", "system");
+		if (!tlmi_priv.pwd_system) {
+			ret = -ENOMEM;
+			goto fail_clear_attr;
+		}
+		if (tlmi_priv.pwdcfg.core.password_state & TLMI_SYS_PWD)
+			tlmi_priv.pwd_system->valid = true;
+
+		kobject_init(&tlmi_priv.pwd_system->kobj, &tlmi_pwd_setting_ktype);
+
+		tlmi_priv.pwd_hdd = tlmi_create_auth("hdd", "hdd");
+		if (!tlmi_priv.pwd_hdd) {
+			ret = -ENOMEM;
+			goto fail_clear_attr;
+		}
+		kobject_init(&tlmi_priv.pwd_hdd->kobj, &tlmi_pwd_setting_ktype);
+
+		tlmi_priv.pwd_nvme = tlmi_create_auth("nvm", "nvme");
+		if (!tlmi_priv.pwd_nvme) {
+			ret = -ENOMEM;
+			goto fail_clear_attr;
+		}
+		kobject_init(&tlmi_priv.pwd_nvme->kobj, &tlmi_pwd_setting_ktype);
+
+		if (tlmi_priv.pwdcfg.core.password_state & TLMI_HDD_PWD) {
+			/* Check if PWD is configured and set index to first drive found */
+			if (tlmi_priv.pwdcfg.ext.hdd_user_password ||
+					tlmi_priv.pwdcfg.ext.hdd_master_password) {
+				tlmi_priv.pwd_hdd->valid = true;
+				if (tlmi_priv.pwdcfg.ext.hdd_master_password)
+					tlmi_priv.pwd_hdd->index =
+						ffs(tlmi_priv.pwdcfg.ext.hdd_master_password) - 1;
+				else
+					tlmi_priv.pwd_hdd->index =
+						ffs(tlmi_priv.pwdcfg.ext.hdd_user_password) - 1;
+			}
+			if (tlmi_priv.pwdcfg.ext.nvme_user_password ||
+					tlmi_priv.pwdcfg.ext.nvme_master_password) {
+				tlmi_priv.pwd_nvme->valid = true;
+				if (tlmi_priv.pwdcfg.ext.nvme_master_password)
+					tlmi_priv.pwd_nvme->index =
+						ffs(tlmi_priv.pwdcfg.ext.nvme_master_password) - 1;
+				else
+					tlmi_priv.pwd_nvme->index =
+						ffs(tlmi_priv.pwdcfg.ext.nvme_user_password) - 1;
+			}
+		}
+	}
 	return 0;
 
-fail_free_pwd_admin:
-	kfree(tlmi_priv.pwd_admin);
 fail_clear_attr:
 	for (i = 0; i < TLMI_SETTINGS_COUNT; ++i) {
 		if (tlmi_priv.setting[i]) {
@@ -973,6 +1216,11 @@ fail_clear_attr:
 			kfree(tlmi_priv.setting[i]);
 		}
 	}
+	kfree(tlmi_priv.pwd_admin);
+	kfree(tlmi_priv.pwd_power);
+	kfree(tlmi_priv.pwd_system);
+	kfree(tlmi_priv.pwd_hdd);
+	kfree(tlmi_priv.pwd_nvme);
 	return ret;
 }
 
diff --git a/drivers/platform/x86/think-lmi.h b/drivers/platform/x86/think-lmi.h
index 2ce5086a5af2..e46c7f383353 100644
--- a/drivers/platform/x86/think-lmi.h
+++ b/drivers/platform/x86/think-lmi.h
@@ -9,6 +9,7 @@
 #define TLMI_SETTINGS_MAXLEN 512
 #define TLMI_PWD_BUFSIZE     129
 #define TLMI_LANG_MAXLEN       4
+#define TLMI_INDEX_MAX        32
 
 /* Possible error values */
 struct tlmi_err_codes {
@@ -21,8 +22,13 @@ enum encoding_option {
 	TLMI_ENCODING_SCANCODE,
 };
 
+enum level_option {
+	TLMI_LEVEL_USER,
+	TLMI_LEVEL_MASTER,
+};
+
 /* password configuration details */
-struct tlmi_pwdcfg {
+struct tlmi_pwdcfg_core {
 	uint32_t password_mode;
 	uint32_t password_state;
 	uint32_t min_length;
@@ -31,6 +37,18 @@ struct tlmi_pwdcfg {
 	uint32_t supported_keyboard;
 };
 
+struct tlmi_pwdcfg_ext {
+	uint32_t hdd_user_password;
+	uint32_t hdd_master_password;
+	uint32_t nvme_user_password;
+	uint32_t nvme_master_password;
+};
+
+struct tlmi_pwdcfg {
+	struct tlmi_pwdcfg_core core;
+	struct tlmi_pwdcfg_ext ext;
+};
+
 /* password setting details */
 struct tlmi_pwd_setting {
 	struct kobject kobj;
@@ -42,6 +60,8 @@ struct tlmi_pwd_setting {
 	int maxlen;
 	enum encoding_option encoding;
 	char kbdlang[TLMI_LANG_MAXLEN];
+	int index; /*Used for HDD and NVME auth */
+	enum level_option level;
 };
 
 /* Attribute setting details */
@@ -61,13 +81,19 @@ struct think_lmi {
 	bool can_get_password_settings;
 	bool pending_changes;
 	bool can_debug_cmd;
+	bool opcode_support;
 
 	struct tlmi_attr_setting *setting[TLMI_SETTINGS_COUNT];
 	struct device *class_dev;
 	struct kset *attribute_kset;
 	struct kset *authentication_kset;
+
+	struct tlmi_pwdcfg pwdcfg;
 	struct tlmi_pwd_setting *pwd_admin;
 	struct tlmi_pwd_setting *pwd_power;
+	struct tlmi_pwd_setting *pwd_system;
+	struct tlmi_pwd_setting *pwd_hdd;
+	struct tlmi_pwd_setting *pwd_nvme;
 };
 
 #endif /* !_THINK_LMI_H_ */

From 01df1385ec4ec699ad6a63007e7f1081089e83a0 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 18 Nov 2021 12:41:49 +0100
Subject: [PATCH 08/78] platform/x86: think-lmi: Move kobject_init() call into
 tlmi_create_auth()

All callers of tlmi_create_auth() also call
kobject_init(&pwd_setting->kobj, &tlmi_pwd_setting_ktype) on the returned
tlmi_pwd_setting struct. Move this into tlmi_create_auth().

Tested-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211118114150.271274-1-hdegoede@redhat.com
---
 drivers/platform/x86/think-lmi.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index fee9e004161f..6eba69334fa6 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -1057,6 +1057,9 @@ static struct tlmi_pwd_setting *tlmi_create_auth(const char *pwd_type,
 	new_pwd->minlen = tlmi_priv.pwdcfg.core.min_length;
 	new_pwd->maxlen = tlmi_priv.pwdcfg.core.max_length;
 	new_pwd->index = 0;
+
+	kobject_init(&new_pwd->kobj, &tlmi_pwd_setting_ktype);
+
 	return new_pwd;
 }
 
@@ -1146,8 +1149,6 @@ static int tlmi_analyze(void)
 	if (tlmi_priv.pwdcfg.core.password_state & TLMI_PAP_PWD)
 		tlmi_priv.pwd_admin->valid = true;
 
-	kobject_init(&tlmi_priv.pwd_admin->kobj, &tlmi_pwd_setting_ktype);
-
 	tlmi_priv.pwd_power = tlmi_create_auth("pop", "power-on");
 	if (!tlmi_priv.pwd_power) {
 		ret = -ENOMEM;
@@ -1156,8 +1157,6 @@ static int tlmi_analyze(void)
 	if (tlmi_priv.pwdcfg.core.password_state & TLMI_POP_PWD)
 		tlmi_priv.pwd_power->valid = true;
 
-	kobject_init(&tlmi_priv.pwd_power->kobj, &tlmi_pwd_setting_ktype);
-
 	if (tlmi_priv.opcode_support) {
 		tlmi_priv.pwd_system = tlmi_create_auth("sys", "system");
 		if (!tlmi_priv.pwd_system) {
@@ -1167,21 +1166,17 @@ static int tlmi_analyze(void)
 		if (tlmi_priv.pwdcfg.core.password_state & TLMI_SYS_PWD)
 			tlmi_priv.pwd_system->valid = true;
 
-		kobject_init(&tlmi_priv.pwd_system->kobj, &tlmi_pwd_setting_ktype);
-
 		tlmi_priv.pwd_hdd = tlmi_create_auth("hdd", "hdd");
 		if (!tlmi_priv.pwd_hdd) {
 			ret = -ENOMEM;
 			goto fail_clear_attr;
 		}
-		kobject_init(&tlmi_priv.pwd_hdd->kobj, &tlmi_pwd_setting_ktype);
 
 		tlmi_priv.pwd_nvme = tlmi_create_auth("nvm", "nvme");
 		if (!tlmi_priv.pwd_nvme) {
 			ret = -ENOMEM;
 			goto fail_clear_attr;
 		}
-		kobject_init(&tlmi_priv.pwd_nvme->kobj, &tlmi_pwd_setting_ktype);
 
 		if (tlmi_priv.pwdcfg.core.password_state & TLMI_HDD_PWD) {
 			/* Check if PWD is configured and set index to first drive found */

From ff448bbaacfb6f216ae101c1f16d8c5142c16fdf Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 18 Nov 2021 12:41:50 +0100
Subject: [PATCH 09/78] platform/x86: think-lmi: Simplify tlmi_analyze() error
 handling a bit

Creating the tlmi_pwd_setting structs can only fail with -ENOMEM, set
ret to this once and simplify the error handling a bit.

Tested-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211118114150.271274-2-hdegoede@redhat.com
---
 drivers/platform/x86/think-lmi.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index 6eba69334fa6..27ab8e4e5b83 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -1141,42 +1141,38 @@ static int tlmi_analyze(void)
 	if (ret)
 		goto fail_clear_attr;
 
+	/* All failures below boil down to kmalloc failures */
+	ret = -ENOMEM;
+
 	tlmi_priv.pwd_admin = tlmi_create_auth("pap", "bios-admin");
-	if (!tlmi_priv.pwd_admin) {
-		ret = -ENOMEM;
+	if (!tlmi_priv.pwd_admin)
 		goto fail_clear_attr;
-	}
+
 	if (tlmi_priv.pwdcfg.core.password_state & TLMI_PAP_PWD)
 		tlmi_priv.pwd_admin->valid = true;
 
 	tlmi_priv.pwd_power = tlmi_create_auth("pop", "power-on");
-	if (!tlmi_priv.pwd_power) {
-		ret = -ENOMEM;
+	if (!tlmi_priv.pwd_power)
 		goto fail_clear_attr;
-	}
+
 	if (tlmi_priv.pwdcfg.core.password_state & TLMI_POP_PWD)
 		tlmi_priv.pwd_power->valid = true;
 
 	if (tlmi_priv.opcode_support) {
 		tlmi_priv.pwd_system = tlmi_create_auth("sys", "system");
-		if (!tlmi_priv.pwd_system) {
-			ret = -ENOMEM;
+		if (!tlmi_priv.pwd_system)
 			goto fail_clear_attr;
-		}
+
 		if (tlmi_priv.pwdcfg.core.password_state & TLMI_SYS_PWD)
 			tlmi_priv.pwd_system->valid = true;
 
 		tlmi_priv.pwd_hdd = tlmi_create_auth("hdd", "hdd");
-		if (!tlmi_priv.pwd_hdd) {
-			ret = -ENOMEM;
+		if (!tlmi_priv.pwd_hdd)
 			goto fail_clear_attr;
-		}
 
 		tlmi_priv.pwd_nvme = tlmi_create_auth("nvm", "nvme");
-		if (!tlmi_priv.pwd_nvme) {
-			ret = -ENOMEM;
+		if (!tlmi_priv.pwd_nvme)
 			goto fail_clear_attr;
-		}
 
 		if (tlmi_priv.pwdcfg.core.password_state & TLMI_HDD_PWD) {
 			/* Check if PWD is configured and set index to first drive found */

From c15f86856bec5bbf9a5ea909ce5ccc5b05744eb1 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:23 +0100
Subject: [PATCH 10/78] platform/x86: thinkpad_acpi: Accept
 ibm_init_struct.init() returning -ENODEV

Commit 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver
to use dev_groups") accidentally modified tpacpi_kbdlang_init() causing it
to return -ENODEV instead of 0 on machines without kbdlang support
(which are most of them).

ibm_init() sees this -ENODEV as an error causing the entire module to not
load, not good.

Note that technically tpacpi_kbdlang_init() was already buggy before, it
should have returned 1 instead of 0 if the feature is not present.

Rather then fixing tpacpi_kbdlang_init() though, IMHO it is bettter to
just make ibm_init() treat -ENODEV as 1 to fix the issue; and then in
a followup commit also change all the existing "return 1"s from
ibm_init_struct.init() callbacks to "return -ENODEV" as -ENODEV clearly
states what it going on where as a magic return of "1" requires a deep
dive into the code to figure out what is going on.

This will also allow removing some extra ifs to translate -ENODEV to
return 1 in a couple of init() callbacks.

Fixes: 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups")
Cc: Len Baker <len.baker@gmx.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-2-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 37aadc64d4e0..9e296b436bea 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10685,8 +10685,8 @@ static int __init ibm_init(struct ibm_init_struct *iibm)
 
 	if (iibm->init) {
 		ret = iibm->init(iibm);
-		if (ret > 0)
-			return 0;	/* probe failed */
+		if (ret > 0 || ret == -ENODEV)
+			return 0; /* subdriver functionality not available */
 		if (ret)
 			return ret;
 

From c7e1c782f2432cd4dc6c6ea930d99d93997a0edb Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:24 +0100
Subject: [PATCH 11/78] platform/x86: thinkpad_acpi: Make *_init() functions
 return -ENODEV instead of 1

Make ibm_init_struct.init() callbacks return -ENODEV instead of 1 when
the subdevice / function is not available.

Using -ENODEV clearly states what it going on where as a magic return of
"1" requires a deep dive into the code to figure out what is going on.

This also allows for some cleanups, avoiding the need to translate an
-ENODEV return into "return 1" (which often mistakenly was "return 0").

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-3-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 85 +++++++++++-----------------
 1 file changed, 34 insertions(+), 51 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 9e296b436bea..c5613399453a 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3377,7 +3377,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		str_supported(tp_features.hotkey));
 
 	if (!tp_features.hotkey)
-		return 1;
+		return -ENODEV;
 
 	quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
 				     ARRAY_SIZE(tpacpi_hotkey_qtable));
@@ -3584,7 +3584,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	return 0;
 
 err_exit:
-	return (res < 0) ? res : 1;
+	return (res < 0) ? res : -ENODEV;
 }
 
 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
@@ -4451,7 +4451,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 	}
 
 	if (!tp_features.bluetooth)
-		return 1;
+		return -ENODEV;
 
 	res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
 				&bluetooth_tprfk_ops,
@@ -4631,7 +4631,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
 	}
 
 	if (!tp_features.wan)
-		return 1;
+		return -ENODEV;
 
 	res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
 				&wan_tprfk_ops,
@@ -4760,7 +4760,7 @@ static int __init uwb_init(struct ibm_init_struct *iibm)
 	}
 
 	if (!tp_features.uwb)
-		return 1;
+		return -ENODEV;
 
 	res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
 				&uwb_tprfk_ops,
@@ -4853,7 +4853,7 @@ static int __init video_init(struct ibm_init_struct *iibm)
 		str_supported(video_supported != TPACPI_VIDEO_NONE),
 		video_supported);
 
-	return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
+	return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
 }
 
 static void video_exit(void)
@@ -5261,7 +5261,7 @@ static int __init kbdlight_init(struct ibm_init_struct *iibm)
 	if (!kbdlight_is_supported()) {
 		tp_features.kbdlight = 0;
 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
-		return 1;
+		return -ENODEV;
 	}
 
 	kbdlight_brightness = kbdlight_sysfs_get(NULL);
@@ -5451,7 +5451,7 @@ static int __init light_init(struct ibm_init_struct *iibm)
 		str_supported(tp_features.light_status));
 
 	if (!tp_features.light)
-		return 1;
+		return -ENODEV;
 
 	rc = led_classdev_register(&tpacpi_pdev->dev,
 				   &tpacpi_led_thinklight.led_classdev);
@@ -5567,7 +5567,7 @@ static int __init cmos_init(struct ibm_init_struct *iibm)
 	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
 		    str_supported(cmos_handle != NULL));
 
-	return cmos_handle ? 0 : 1;
+	return cmos_handle ? 0 : -ENODEV;
 }
 
 static int cmos_read(struct seq_file *m)
@@ -5912,7 +5912,7 @@ static int __init led_init(struct ibm_init_struct *iibm)
 		str_supported(led_supported), led_supported);
 
 	if (led_supported == TPACPI_LED_NONE)
-		return 1;
+		return -ENODEV;
 
 	tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
 			      GFP_KERNEL);
@@ -6041,7 +6041,7 @@ static int __init beep_init(struct ibm_init_struct *iibm)
 
 	tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
 
-	return (beep_handle) ? 0 : 1;
+	return (beep_handle) ? 0 : -ENODEV;
 }
 
 static int beep_read(struct seq_file *m)
@@ -6425,7 +6425,7 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
 		thermal_read_mode);
 
-	return thermal_read_mode == TPACPI_THERMAL_NONE ? 1 : 0;
+	return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
 }
 
 static int thermal_read(struct seq_file *m)
@@ -6836,25 +6836,25 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 
 	/* if it is unknown, we don't handle it: it wouldn't be safe */
 	if (tp_features.bright_unkfw)
-		return 1;
+		return -ENODEV;
 
 	if (!brightness_enable) {
 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
 			   "brightness support disabled by module parameter\n");
-		return 1;
+		return -ENODEV;
 	}
 
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
 		if (brightness_enable > 1) {
 			pr_info("Standard ACPI backlight interface available, not loading native one\n");
-			return 1;
+			return -ENODEV;
 		} else if (brightness_enable == 1) {
 			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
-			return 1;
+			return -ENODEV;
 		}
 	} else if (!tp_features.bright_acpimode) {
 		pr_notice("ACPI backlight interface not available\n");
-		return 1;
+		return -ENODEV;
 	}
 
 	pr_notice("ACPI native brightness control enabled\n");
@@ -6887,7 +6887,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 		return -EINVAL;
 
 	if (tpacpi_brightness_get_raw(&b) < 0)
-		return 1;
+		return -ENODEV;
 
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_PLATFORM;
@@ -7477,7 +7477,7 @@ static int __init volume_create_alsa_mixer(void)
 			  sizeof(struct tpacpi_alsa_data), &card);
 	if (rc < 0 || !card) {
 		pr_err("Failed to create ALSA card structures: %d\n", rc);
-		return 1;
+		return -ENODEV;
 	}
 
 	BUG_ON(!card->private_data);
@@ -7536,7 +7536,7 @@ static int __init volume_create_alsa_mixer(void)
 
 err_exit:
 	snd_card_free(card);
-	return 1;
+	return -ENODEV;
 }
 
 #define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
@@ -7585,7 +7585,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
 		pr_err("UCMS step volume mode not implemented, please contact %s\n",
 		       TPACPI_MAIL);
-		return 1;
+		return -ENODEV;
 	}
 
 	if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
@@ -7598,7 +7598,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 	if (!alsa_enable) {
 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
 			    "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
-		return 1;
+		return -ENODEV;
 	}
 
 	quirks = tpacpi_check_quirks(volume_quirk_table,
@@ -7611,7 +7611,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 		else if (quirks & TPACPI_VOL_Q_LEVEL)
 			tp_features.mixer_no_level_control = 0;
 		else
-			return 1; /* no mixer */
+			return -ENODEV; /* no mixer */
 		break;
 	case TPACPI_VOL_CAP_VOLMUTE:
 		tp_features.mixer_no_level_control = 0;
@@ -7620,7 +7620,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 		tp_features.mixer_no_level_control = 1;
 		break;
 	default:
-		return 1;
+		return -ENODEV;
 	}
 
 	if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
@@ -7792,7 +7792,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 {
 	pr_info("volume: disabled as there is no ALSA support in this kernel\n");
 
-	return 1;
+	return -ENODEV;
 }
 
 static struct ibm_struct volume_driver_data = {
@@ -8729,7 +8729,7 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 			}
 		} else {
 			pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
-			return 1;
+			return -ENODEV;
 		}
 	}
 
@@ -8778,11 +8778,11 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 	if (fan_status_access_mode != TPACPI_FAN_NONE)
 		fan_get_status_safe(NULL);
 
-	if (fan_status_access_mode != TPACPI_FAN_NONE ||
-	    fan_control_access_mode != TPACPI_FAN_WR_NONE)
-		return 0;
+	if (fan_status_access_mode == TPACPI_FAN_NONE &&
+	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
+		return -ENODEV;
 
-	return 1;
+	return 0;
 }
 
 static void fan_exit(void)
@@ -9886,12 +9886,9 @@ static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
 
 	palm_err = palmsensor_get(&has_palmsensor, &palm_state);
 	lap_err = lapsensor_get(&has_lapsensor, &lap_state);
-	/*
-	 * If support isn't available (ENODEV) for both devices then quit, but
-	 * don't return an error.
-	 */
+	/* If support isn't available for both devices return -ENODEV */
 	if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
-		return 0;
+		return -ENODEV;
 	/* Otherwise, if there was an error return it */
 	if (palm_err && (palm_err != -ENODEV))
 		return palm_err;
@@ -10127,13 +10124,6 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 
 	dytc_profile_available = false;
 	err = dytc_command(DYTC_CMD_QUERY, &output);
-	/*
-	 * If support isn't available (ENODEV) then don't return an error
-	 * and don't create the sysfs group
-	 */
-	if (err == -ENODEV)
-		return 0;
-	/* For all other errors we can flag the failure */
 	if (err)
 		return err;
 
@@ -10436,16 +10426,9 @@ static const struct attribute_group dprc_attr_group = {
 
 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
 {
-	int err = get_wwan_antenna(&wwan_antennatype);
+	int err;
 
-	/*
-	 * If support isn't available (ENODEV) then quit, but don't
-	 * return an error.
-	 */
-	if (err == -ENODEV)
-		return 0;
-
-	/* If there was an error return it */
+	err = get_wwan_antenna(&wwan_antennatype);
 	if (err)
 		return err;
 

From 5a47ac0041678d3d610b3ac724bca8c4bda2ddff Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:25 +0100
Subject: [PATCH 12/78] platform/x86: thinkpad_acpi: Simplify dytc_version
 handling

The only reason the proxysensor code needs dytc_version handling is for
proxsensor_attr_is_visible() and that will only ever get called after
all the subdrv init() callbacks have run.

tpacpi_dytc_profile_init() already calls DYTC_CMD_QUERY and is the
primary consumer of dytc_version, so simply let tpacpi_dytc_profile_init()
set dytc_version and remove the now no longer necessary dytc_get_version()
helper and its calls.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-4-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 47 +++-------------------------
 1 file changed, 5 insertions(+), 42 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index c5613399453a..724a0e966c58 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9742,33 +9742,6 @@ static int dytc_command(int command, int *output)
 	return 0;
 }
 
-static int dytc_get_version(void)
-{
-	int err, output;
-
-	/* Check if we've been called before - and just return cached value */
-	if (dytc_version)
-		return dytc_version;
-
-	/* Otherwise query DYTC and extract version information */
-	err = dytc_command(DYTC_CMD_QUERY, &output);
-	/*
-	 * If support isn't available (ENODEV) then don't return an error
-	 * and don't create the sysfs group
-	 */
-	if (err == -ENODEV)
-		return 0;
-	/* For all other errors we can flag the failure */
-	if (err)
-		return err;
-
-	/* Check DYTC is enabled and supports mode setting */
-	if (output & BIT(DYTC_QUERY_ENABLE_BIT))
-		dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
-
-	return 0;
-}
-
 static int lapsensor_get(bool *present, bool *state)
 {
 	int output, err;
@@ -9865,7 +9838,7 @@ static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
 		 * Platforms before DYTC version 5 claim to have a lap sensor,
 		 * but it doesn't work, so we ignore them.
 		 */
-		if (!has_lapsensor ||  dytc_version < 5)
+		if (!has_lapsensor || dytc_version < 5)
 			return 0;
 	} else if (attr == &dev_attr_palmsensor.attr) {
 		if (!has_palmsensor)
@@ -9882,7 +9855,7 @@ static const struct attribute_group proxsensor_attr_group = {
 
 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
 {
-	int palm_err, lap_err, err;
+	int palm_err, lap_err;
 
 	palm_err = palmsensor_get(&has_palmsensor, &palm_state);
 	lap_err = lapsensor_get(&has_lapsensor, &lap_state);
@@ -9895,13 +9868,6 @@ static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
 	if (lap_err && (lap_err != -ENODEV))
 		return lap_err;
 
-	/* Check if we know the DYTC version, if we don't then get it */
-	if (!dytc_version) {
-		err = dytc_get_version();
-		if (err)
-			return err;
-	}
-
 	return 0;
 }
 
@@ -10127,12 +10093,9 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 	if (err)
 		return err;
 
-	/* Check if we know the DYTC version, if we don't then get it */
-	if (!dytc_version) {
-		err = dytc_get_version();
-		if (err)
-			return err;
-	}
+	if (output & BIT(DYTC_QUERY_ENABLE_BIT))
+		dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
+
 	/* Check DYTC is enabled and supports mode setting */
 	if (dytc_version >= 5) {
 		dbg_printk(TPACPI_DBG_INIT,

From 0b0d2fba4f3302b601c429c9286e66b3af2d29cb Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:26 +0100
Subject: [PATCH 13/78] platform/x86: thinkpad_acpi: Cleanup
 dytc_profile_available

Remove the dytc_profile_available check from dytc_profile_set(),
that function only gets called if the platform_profile_handler was
registered, so the check is not necessary.

Make tpacpi_dytc_profile_init() return -ENODEV when it does not register
the platform_profile() handler this will cause
dytc_profile_driver_data.flags.init to not get set, which in turn will
cause the dytc_profile_exit() call to get skipped.

Together this avoids the need to have the dytc_profile_available
variable at all, since the information is now duplicated in the
dytc_profile_driver_data.flags.init flag.

Note this leaves a weirdly indented code-block behind, this is
deliberately done to make what actually changes in this commit clear.
This will be fixed-up in the next commit.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-5-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 724a0e966c58..7b7667b1a6fb 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9911,7 +9911,6 @@ static struct ibm_struct proxsensor_driver_data = {
 
 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 1)
 
-static bool dytc_profile_available;
 static enum platform_profile_option dytc_current_profile;
 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
 static DEFINE_MUTEX(dytc_mutex);
@@ -10015,9 +10014,6 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
 	int output;
 	int err;
 
-	if (!dytc_profile_available)
-		return -ENODEV;
-
 	err = mutex_lock_interruptible(&dytc_mutex);
 	if (err)
 		return err;
@@ -10088,7 +10084,6 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 	set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
 	set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
 
-	dytc_profile_available = false;
 	err = dytc_command(DYTC_CMD_QUERY, &output);
 	if (err)
 		return err;
@@ -10097,7 +10092,10 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 		dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
 
 	/* Check DYTC is enabled and supports mode setting */
-	if (dytc_version >= 5) {
+	if (dytc_version < 5)
+		return -ENODEV;
+
+	{
 		dbg_printk(TPACPI_DBG_INIT,
 				"DYTC version %d: thermal mode available\n", dytc_version);
 		/*
@@ -10117,9 +10115,8 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 		 * don't quit terminally.
 		 */
 		if (err)
-			return 0;
+			return -ENODEV;
 
-		dytc_profile_available = true;
 		/* Ensure initial values are correct */
 		dytc_profile_refresh();
 	}
@@ -10128,10 +10125,7 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 
 static void dytc_profile_exit(void)
 {
-	if (dytc_profile_available) {
-		dytc_profile_available = false;
-		platform_profile_remove();
-	}
+	platform_profile_remove();
 }
 
 static struct ibm_struct  dytc_profile_driver_data = {

From 798682e236893a20e5674de02ede474373dd342d Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:27 +0100
Subject: [PATCH 14/78] platform/x86: thinkpad_acpi: Properly indent code in
 tpacpi_dytc_profile_init()

The previous refactoring of some code in tpacpi_dytc_profile_init() left
a weirdly indented code-block behind.

Remove the unnecessary '{}' and reduce the indent level one step,
other then changing the indentation the code is completely unchanged.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-6-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 47 ++++++++++++++--------------
 1 file changed, 23 insertions(+), 24 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 7b7667b1a6fb..ca86e6c2b546 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10095,31 +10095,30 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 	if (dytc_version < 5)
 		return -ENODEV;
 
-	{
-		dbg_printk(TPACPI_DBG_INIT,
-				"DYTC version %d: thermal mode available\n", dytc_version);
-		/*
-		 * Check if MMC_GET functionality available
-		 * Version > 6 and return success from MMC_GET command
-		 */
-		dytc_mmc_get_available = false;
-		if (dytc_version >= 6) {
-			err = dytc_command(DYTC_CMD_MMC_GET, &output);
-			if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
-				dytc_mmc_get_available = true;
-		}
-		/* Create platform_profile structure and register */
-		err = platform_profile_register(&dytc_profile);
-		/*
-		 * If for some reason platform_profiles aren't enabled
-		 * don't quit terminally.
-		 */
-		if (err)
-			return -ENODEV;
-
-		/* Ensure initial values are correct */
-		dytc_profile_refresh();
+	dbg_printk(TPACPI_DBG_INIT,
+			"DYTC version %d: thermal mode available\n", dytc_version);
+	/*
+	 * Check if MMC_GET functionality available
+	 * Version > 6 and return success from MMC_GET command
+	 */
+	dytc_mmc_get_available = false;
+	if (dytc_version >= 6) {
+		err = dytc_command(DYTC_CMD_MMC_GET, &output);
+		if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
+			dytc_mmc_get_available = true;
 	}
+	/* Create platform_profile structure and register */
+	err = platform_profile_register(&dytc_profile);
+	/*
+	 * If for some reason platform_profiles aren't enabled
+	 * don't quit terminally.
+	 */
+	if (err)
+		return -ENODEV;
+
+	/* Ensure initial values are correct */
+	dytc_profile_refresh();
+
 	return 0;
 }
 

From cb97f5f01d383ff166d50e356d07ac38d6033ac8 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:28 +0100
Subject: [PATCH 15/78] platform/x86: thinkpad_acpi: Remove "goto err_exit"
 from hotkey_init()

The err_exit label just does a:
 return (res < 0) ? res : -ENODEV;

And res is always < 0 when we go there (hotkey_mask_get() returns
either 0 or -EIO), so the goto-s can simply be replaced with
"return res".

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-7-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index ca86e6c2b546..45b68042e1fb 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3464,7 +3464,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		 * the first hotkey_mask_get to return hotkey_orig_mask */
 		res = hotkey_mask_get();
 		if (res)
-			goto err_exit;
+			return res;
 
 		hotkey_orig_mask = hotkey_acpi_mask;
 	} else {
@@ -3500,8 +3500,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 			TPACPI_HOTKEY_MAP_SIZE,	GFP_KERNEL);
 	if (!hotkey_keycode_map) {
 		pr_err("failed to allocate memory for key map\n");
-		res = -ENOMEM;
-		goto err_exit;
+		return -ENOMEM;
 	}
 
 	input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
@@ -3582,9 +3581,6 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	hotkey_poll_setup_safe(true);
 
 	return 0;
-
-err_exit:
-	return (res < 0) ? res : -ENODEV;
 }
 
 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser

From 3a0abea60c6a39f5362db6d78cba7a932850fec2 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 21 Nov 2021 20:11:29 +0100
Subject: [PATCH 16/78] platform/x86: thinkpad_acpi: Fix
 thermal_temp_input_attr sorting

Fix thermal_temp_input_attr sorting. Now that we use is_visible,
rather then registering only part of the thermal_temp_input_attr array,
putting attr 0-7 last is no longer needed.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Mark Pearson <mpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211121191129.256713-8-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 45b68042e1fb..59a75ac4bca8 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6267,14 +6267,6 @@ static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
 	&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
 
 static struct attribute *thermal_temp_input_attr[] = {
-	THERMAL_ATTRS(8),
-	THERMAL_ATTRS(9),
-	THERMAL_ATTRS(10),
-	THERMAL_ATTRS(11),
-	THERMAL_ATTRS(12),
-	THERMAL_ATTRS(13),
-	THERMAL_ATTRS(14),
-	THERMAL_ATTRS(15),
 	THERMAL_ATTRS(0),
 	THERMAL_ATTRS(1),
 	THERMAL_ATTRS(2),
@@ -6283,6 +6275,14 @@ static struct attribute *thermal_temp_input_attr[] = {
 	THERMAL_ATTRS(5),
 	THERMAL_ATTRS(6),
 	THERMAL_ATTRS(7),
+	THERMAL_ATTRS(8),
+	THERMAL_ATTRS(9),
+	THERMAL_ATTRS(10),
+	THERMAL_ATTRS(11),
+	THERMAL_ATTRS(12),
+	THERMAL_ATTRS(13),
+	THERMAL_ATTRS(14),
+	THERMAL_ATTRS(15),
 	NULL
 };
 

From 910524004383863bb1d2888e510dd61fd00119d0 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:04:19 +0100
Subject: [PATCH 17/78] platform/x86: thinkpad_acpi: Restore missing
 hotkey_tablet_mode and hotkey_radio_sw sysfs-attr

Commit c99ca78d67a6 ("platform/x86: thinkpad_acpi: Switch to common use
of attributes") removed the conditional adding of the
hotkey_tablet_mode and hotkey_radio_sw sysfs-attributes, replacing this
with a hotkey_attr_is_visible() callback which hides them when the
feature is not present.

But this commit forgot to add these 2 attributes to the default
hotkey_attributes[] set, so they would now never get added at all.

Add the 2 attributes to the default hotkey_attributes[] set so that
they are available on systems with these features once more.

Fixes: c99ca78d67a6 ("platform/x86: thinkpad_acpi: Switch to common use of attributes")
Cc: Len Baker <len.baker@gmx.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210424.266607-2-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 59a75ac4bca8..5c2572abd98e 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -2960,6 +2960,8 @@ static struct attribute *hotkey_attributes[] = {
 	&dev_attr_hotkey_all_mask.attr,
 	&dev_attr_hotkey_adaptive_all_mask.attr,
 	&dev_attr_hotkey_recommended_mask.attr,
+	&dev_attr_hotkey_tablet_mode.attr,
+	&dev_attr_hotkey_radio_sw.attr,
 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
 	&dev_attr_hotkey_source_mask.attr,
 	&dev_attr_hotkey_poll_freq.attr,

From 2f5ad08f3eec8d4376b62f3fe708102f6aaea056 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:04:20 +0100
Subject: [PATCH 18/78] platform/x86: thinkpad_acpi: Register tpacpi_pdriver
 after subdriver init

Commit 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver
to use dev_groups") introduces the use of driver.dev_groups +
attribute_group.is_visible callbacks replacing the conditional calling of
driver_create_file() for optional attributes.

The is_visible callbacks rely on various tp_features.has_foo flags,
which get set by the subdriver init functions.

But before this fix, thinkpad_acpi_module_init() would call the
subdriver init functions after registering the platform_device and
the tpacpi_pdriver. Which would cause the is_visible callbacks to
get called before the subdriver init functions, which in turn would
cause optional attributes to not get registered at all, even when
the feature is actually present.

Fix this by moving the platform_driver_register(&tpacpi_pdriver) to after
the subdriver init calls; and do the same for the tpacpi_hmon_pdriver.

Fixes: 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups")
Cc: Len Baker <len.baker@gmx.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210424.266607-3-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 41 ++++++++++++++--------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 5c2572abd98e..1aa292e6cc96 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -11113,6 +11113,11 @@ static void thinkpad_acpi_module_exit(void)
 
 	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
 
+	if (tp_features.sensors_pdrv_registered)
+		platform_driver_unregister(&tpacpi_hwmon_pdriver);
+	if (tp_features.platform_drv_registered)
+		platform_driver_unregister(&tpacpi_pdriver);
+
 	list_for_each_entry_safe_reverse(ibm, itmp,
 					 &tpacpi_all_drivers,
 					 all_drivers) {
@@ -11135,10 +11140,6 @@ static void thinkpad_acpi_module_exit(void)
 		platform_device_unregister(tpacpi_sensors_pdev);
 	if (tpacpi_pdev)
 		platform_device_unregister(tpacpi_pdev);
-	if (tp_features.sensors_pdrv_registered)
-		platform_driver_unregister(&tpacpi_hwmon_pdriver);
-	if (tp_features.platform_drv_registered)
-		platform_driver_unregister(&tpacpi_pdriver);
 	if (proc_dir)
 		remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
 	if (tpacpi_wq)
@@ -11192,22 +11193,6 @@ static int __init thinkpad_acpi_module_init(void)
 		return -ENODEV;
 	}
 
-	ret = platform_driver_register(&tpacpi_pdriver);
-	if (ret) {
-		pr_err("unable to register main platform driver\n");
-		thinkpad_acpi_module_exit();
-		return ret;
-	}
-	tp_features.platform_drv_registered = 1;
-
-	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
-	if (ret) {
-		pr_err("unable to register hwmon platform driver\n");
-		thinkpad_acpi_module_exit();
-		return ret;
-	}
-	tp_features.sensors_pdrv_registered = 1;
-
 	/* Device initialization */
 	tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
 							NULL, 0);
@@ -11271,6 +11256,22 @@ static int __init thinkpad_acpi_module_init(void)
 
 	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
 
+	ret = platform_driver_register(&tpacpi_pdriver);
+	if (ret) {
+		pr_err("unable to register main platform driver\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+	tp_features.platform_drv_registered = 1;
+
+	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
+	if (ret) {
+		pr_err("unable to register hwmon platform driver\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+	tp_features.sensors_pdrv_registered = 1;
+
 	ret = input_register_device(tpacpi_inputdev);
 	if (ret < 0) {
 		pr_err("unable to register input device\n");

From 5cd689683eb0507c67f825f1c29b17bb80612468 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:04:21 +0100
Subject: [PATCH 19/78] platform/x86: thinkpad_acpi: tpacpi_attr_group contains
 driver attributes not device attrs

Commit 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver
to use dev_groups") put the debug_level, interface_version, version and the
THINKPAD_ACPI_DEBUGFACILITIES attributes in a new tpacpi_attr_group and
added those to the tpacpi_groups groups-array which is used to initialize
the driver.dev_groups member.

But before this commit these attributes were registered with
driver_create_file(), so they should be part of the groups-array which is
used to initialize the driver.groups member instead.

And also make the same change for the fan_watchdog hwmon driver attribute.

Fixes: 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups")
Cc: Len Baker <len.baker@gmx.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210424.266607-4-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 30 +++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 1aa292e6cc96..93c1c925b655 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -8630,7 +8630,6 @@ static struct attribute *fan_attributes[] = {
 	&dev_attr_pwm1.attr,
 	&dev_attr_fan1_input.attr,
 	&dev_attr_fan2_input.attr,
-	&driver_attr_fan_watchdog.attr,
 	NULL
 };
 
@@ -8654,6 +8653,16 @@ static const struct attribute_group fan_attr_group = {
 	.attrs = fan_attributes,
 };
 
+static struct attribute *fan_driver_attributes[] = {
+	&driver_attr_fan_watchdog.attr,
+	NULL
+};
+
+static const struct attribute_group fan_driver_attr_group = {
+	.is_visible = fan_attr_is_visible,
+	.attrs = fan_driver_attributes,
+};
+
 #define TPACPI_FAN_Q1	0x0001		/* Unitialized HFSP */
 #define TPACPI_FAN_2FAN	0x0002		/* EC 0x31 bit 0 selects fan2 */
 #define TPACPI_FAN_2CTL	0x0004		/* selects fan2 control */
@@ -10396,7 +10405,7 @@ static struct ibm_struct dprc_driver_data = {
 
 /* --------------------------------------------------------------------- */
 
-static struct attribute *tpacpi_attributes[] = {
+static struct attribute *tpacpi_driver_attributes[] = {
 	&driver_attr_debug_level.attr,
 	&driver_attr_version.attr,
 	&driver_attr_interface_version.attr,
@@ -10431,11 +10440,16 @@ static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
 }
 #endif
 
-static const struct attribute_group tpacpi_attr_group = {
+static const struct attribute_group tpacpi_driver_attr_group = {
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 	.is_visible = tpacpi_attr_is_visible,
 #endif
-	.attrs = tpacpi_attributes,
+	.attrs = tpacpi_driver_attributes,
+};
+
+static const struct attribute_group *tpacpi_driver_groups[] = {
+	&tpacpi_driver_attr_group,
+	NULL,
 };
 
 static const struct attribute_group *tpacpi_groups[] = {
@@ -10447,7 +10461,6 @@ static const struct attribute_group *tpacpi_groups[] = {
 	&proxsensor_attr_group,
 	&kbdlang_attr_group,
 	&dprc_attr_group,
-	&tpacpi_attr_group,
 	NULL,
 };
 
@@ -10458,6 +10471,11 @@ static const struct attribute_group *tpacpi_hwmon_groups[] = {
 	NULL,
 };
 
+static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
+	&fan_driver_attr_group,
+	NULL,
+};
+
 /****************************************************************************
  ****************************************************************************
  *
@@ -10470,6 +10488,7 @@ static struct platform_driver tpacpi_pdriver = {
 	.driver = {
 		.name = TPACPI_DRVR_NAME,
 		.pm = &tpacpi_pm,
+		.groups = tpacpi_driver_groups,
 		.dev_groups = tpacpi_groups,
 	},
 	.shutdown = tpacpi_shutdown_handler,
@@ -10478,6 +10497,7 @@ static struct platform_driver tpacpi_pdriver = {
 static struct platform_driver tpacpi_hwmon_pdriver = {
 	.driver = {
 		.name = TPACPI_HWMON_DRVR_NAME,
+		.groups = tpacpi_hwmon_driver_groups,
 		.dev_groups = tpacpi_hwmon_groups,
 	},
 };

From 526ac103dbc67291a071fc57aab0f85ad7298ef3 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:04:22 +0100
Subject: [PATCH 20/78] platform/x86: thinkpad_acpi: Fix the hwmon sysfs-attr
 showing up in the wrong place

The hwmon sysfs-attr should show up under the hwmon-classdev, not under
the tpacpi_sensors_pdev. Pass the tpacpi_hwmon_groups attr-groups array
to hwmon_device_register_with_groups() instead of setting
tpacpi_hwmon_pdriver.driver.dev_groups to it to fix this.

This also requires moving the hwmon_device_register_with_groups() call to
after the subdriver init functions have run so that the is_visible()
calls will work properly.

Fixes: 79f960e29cfc ("platform/x86: thinkpad_acpi: Convert platform driver to use dev_groups")
Cc: Len Baker <len.baker@gmx.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210424.266607-5-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 93c1c925b655..63cb71c91530 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10498,7 +10498,6 @@ static struct platform_driver tpacpi_hwmon_pdriver = {
 	.driver = {
 		.name = TPACPI_HWMON_DRVR_NAME,
 		.groups = tpacpi_hwmon_driver_groups,
-		.dev_groups = tpacpi_hwmon_groups,
 	},
 };
 
@@ -11133,6 +11132,8 @@ static void thinkpad_acpi_module_exit(void)
 
 	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
 
+	if (tpacpi_hwmon)
+		hwmon_device_unregister(tpacpi_hwmon);
 	if (tp_features.sensors_pdrv_registered)
 		platform_driver_unregister(&tpacpi_hwmon_pdriver);
 	if (tp_features.platform_drv_registered)
@@ -11154,8 +11155,6 @@ static void thinkpad_acpi_module_exit(void)
 		kfree(hotkey_keycode_map);
 	}
 
-	if (tpacpi_hwmon)
-		hwmon_device_unregister(tpacpi_hwmon);
 	if (tpacpi_sensors_pdev)
 		platform_device_unregister(tpacpi_sensors_pdev);
 	if (tpacpi_pdev)
@@ -11234,16 +11233,7 @@ static int __init thinkpad_acpi_module_init(void)
 		return ret;
 	}
 	tp_features.sensors_pdev_attrs_registered = 1;
-	tpacpi_hwmon = hwmon_device_register_with_groups(
-		&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
 
-	if (IS_ERR(tpacpi_hwmon)) {
-		ret = PTR_ERR(tpacpi_hwmon);
-		tpacpi_hwmon = NULL;
-		pr_err("unable to register hwmon device\n");
-		thinkpad_acpi_module_exit();
-		return ret;
-	}
 	mutex_init(&tpacpi_inputdev_send_mutex);
 	tpacpi_inputdev = input_allocate_device();
 	if (!tpacpi_inputdev) {
@@ -11292,6 +11282,16 @@ static int __init thinkpad_acpi_module_init(void)
 	}
 	tp_features.sensors_pdrv_registered = 1;
 
+	tpacpi_hwmon = hwmon_device_register_with_groups(
+		&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
+	if (IS_ERR(tpacpi_hwmon)) {
+		ret = PTR_ERR(tpacpi_hwmon);
+		tpacpi_hwmon = NULL;
+		pr_err("unable to register hwmon device\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+
 	ret = input_register_device(tpacpi_inputdev);
 	if (ret < 0) {
 		pr_err("unable to register input device\n");

From f3dc3009c2edb1512e0fe6964f387045a36b2ff4 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:04:23 +0100
Subject: [PATCH 21/78] platform/x86: thinkpad_acpi: Remove unused
 sensors_pdev_attrs_registered flag

After the recent sysfs-attributes registration cleanups, the
tp_features.sensors_pdev_attrs_registered flag only ever gets set and
never gets read, remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210424.266607-6-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 63cb71c91530..c198acc6f53b 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -333,7 +333,6 @@ static struct {
 	u32 input_device_registered:1;
 	u32 platform_drv_registered:1;
 	u32 sensors_pdrv_registered:1;
-	u32 sensors_pdev_attrs_registered:1;
 	u32 hotkey_poll_active:1;
 	u32 has_adaptive_kbd:1;
 	u32 kbd_lang:1;
@@ -11232,7 +11231,6 @@ static int __init thinkpad_acpi_module_init(void)
 		thinkpad_acpi_module_exit();
 		return ret;
 	}
-	tp_features.sensors_pdev_attrs_registered = 1;
 
 	mutex_init(&tpacpi_inputdev_send_mutex);
 	tpacpi_inputdev = input_allocate_device();

From e518704d634fe3205903da6cbe97debf34885812 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:05:23 +0100
Subject: [PATCH 22/78] platform/x86: thinkpad_acpi: Add LED_RETAIN_AT_SHUTDOWN
 to led_class_devs

Add the LED_RETAIN_AT_SHUTDOWN flag to the registered led_class_devs so
that the LEDs do not get turned-off when reloading the driver and thus so
that they also stay under default EC control when reloading the driver,
unless explicitly overridden by the user.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210524.266705-1-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index c198acc6f53b..07db6d5f1f90 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -5809,6 +5809,7 @@ static int __init tpacpi_init_led(unsigned int led)
 		tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
 
 	tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
+	tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN;
 	tpacpi_leds[led].led = led;
 
 	return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);

From e1dbdd2f4a5247f579c930fe514de3cf0cc58e81 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 23 Nov 2021 22:05:24 +0100
Subject: [PATCH 23/78] platform/x86: thinkpad_acpi: Add lid_logo_dot to the
 list of safe LEDs

There have been various bugs / forum threads about allowing control of
the LED in the ThinkPad logo on the lid of various models.

This seems to be something which users want to control and there really
is no reason to require setting CONFIG_THINKPAD_ACPI_UNSAFE_LEDS for this.

The lid-logo-dot is LED number 10, so change the name of the 10th led
from unknown_led2 to lid_logo_dot and add it to the TPACPI_SAFE_LEDS mask.

Link: https://www.reddit.com/r/thinkpad/comments/7n8eyu/thinkpad_led_control_under_gnulinux/
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1943318
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211123210524.266705-2-hdegoede@redhat.com
---
 drivers/platform/x86/thinkpad_acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 07db6d5f1f90..38996e6e2a7a 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -5643,11 +5643,11 @@ static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
 	"tpacpi::standby",
 	"tpacpi::dock_status1",
 	"tpacpi::dock_status2",
-	"tpacpi::unknown_led2",
+	"tpacpi::lid_logo_dot",
 	"tpacpi::unknown_led3",
 	"tpacpi::thinkvantage",
 };
-#define TPACPI_SAFE_LEDS	0x1081U
+#define TPACPI_SAFE_LEDS	0x1481U
 
 static inline bool tpacpi_is_led_restricted(const unsigned int led)
 {

From 37f34df84ac76703536e5bec0b209f1e82a8a0cd Mon Sep 17 00:00:00 2001
From: Yang Li <yang.lee@linux.alibaba.com>
Date: Wed, 24 Nov 2021 10:02:12 +0800
Subject: [PATCH 24/78] platform/x86: asus-wmi: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/platform/x86/asus-wmi.c:2386:2-3: Unneeded semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/1637719332-45224-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/asus-wmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index ab0c087d40cf..6fa4b0be8e76 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -2383,7 +2383,7 @@ static ssize_t fan_curve_enable_store(struct device *dev,
 		break;
 	default:
 		return -EINVAL;
-	};
+	}
 
 	if (data->enabled) {
 		err = fan_curve_write(asus, data);

From 60a076ea8a6d4e5216d5232d8bc98164c7bc1ffd Mon Sep 17 00:00:00 2001
From: Matan Ziv-Av <matan@svgalib.org>
Date: Tue, 23 Nov 2021 22:14:55 +0200
Subject: [PATCH 25/78] platform/x86: lg-laptop: Recognize more models

LG uses 5 instead of 0 in the third digit (second digit after 2019)
of the year string to indicate newer models in the same year.
Handle this case as well.

Signed-off-by: Matan Ziv-Av <matan@svgalib.org>
Link: https://lore.kernel.org/r/c752b3b2-9718-bd9a-732d-e165aa8a1fca@svgalib.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/lg-laptop.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/platform/x86/lg-laptop.c b/drivers/platform/x86/lg-laptop.c
index ae9293024c77..a91847a551a7 100644
--- a/drivers/platform/x86/lg-laptop.c
+++ b/drivers/platform/x86/lg-laptop.c
@@ -657,6 +657,18 @@ static int acpi_add(struct acpi_device *device)
 	if (product && strlen(product) > 4)
 		switch (product[4]) {
 		case '5':
+			if (strlen(product) > 5)
+				switch (product[5]) {
+				case 'N':
+					year = 2021;
+					break;
+				case '0':
+					year = 2016;
+					break;
+				default:
+					year = 2022;
+				}
+			break;
 		case '6':
 			year = 2016;
 			break;

From a274cd66bc6461b45a450cd3f5653473a9aaea75 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 24 Nov 2021 18:51:25 +0100
Subject: [PATCH 26/78] platform/x86: touchscreen_dmi: Add TrekStor SurfTab duo
 W1 touchscreen info

The TrekStor SurfTab duo W1 (ST10432-10b) has a Goodix touchscreen which
has its x-axis mirrored.

Add a quirk to fix this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211124175125.250329-1-hdegoede@redhat.com
---
 drivers/platform/x86/touchscreen_dmi.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index fa8812039b82..17dd54d4b783 100644
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c
@@ -905,6 +905,16 @@ static const struct ts_dmi_data trekstor_primetab_t13b_data = {
 	.properties = trekstor_primetab_t13b_props,
 };
 
+static const struct property_entry trekstor_surftab_duo_w1_props[] = {
+	PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
+	{ }
+};
+
+static const struct ts_dmi_data trekstor_surftab_duo_w1_data = {
+	.acpi_name	= "GDIX1001:00",
+	.properties	= trekstor_surftab_duo_w1_props,
+};
+
 static const struct property_entry trekstor_surftab_twin_10_1_props[] = {
 	PROPERTY_ENTRY_U32("touchscreen-min-x", 20),
 	PROPERTY_ENTRY_U32("touchscreen-min-y", 0),
@@ -1502,6 +1512,14 @@ const struct dmi_system_id touchscreen_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Primetab T13B"),
 		},
 	},
+	{
+		/* TrekStor SurfTab duo W1 10.1 ST10432-10b */
+		.driver_data = (void *)&trekstor_surftab_duo_w1_data,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "SurfTab duo W1 10.1 (VT4)"),
+		},
+	},
 	{
 		/* TrekStor SurfTab twin 10.1 ST10432-8 */
 		.driver_data = (void *)&trekstor_surftab_twin_10_1_data,

From a602f5111fdd3d8a8ea2ac9e61f1c047d9794062 Mon Sep 17 00:00:00 2001
From: Fabrizio Bertocci <fabriziobertocci@gmail.com>
Date: Mon, 29 Nov 2021 23:15:40 -0500
Subject: [PATCH 27/78] platform/x86: amd-pmc: Fix s2idle failures on certain
 AMD laptops

On some AMD hardware laptops, the system fails communicating with the
PMC when entering s2idle and the machine is battery powered.

Hardware description: HP Pavilion Aero Laptop 13-be0097nr
CPU: AMD Ryzen 7 5800U with Radeon Graphics
GPU: 03:00.0 VGA compatible controller [0300]: Advanced Micro Devices,
Inc. [AMD/ATI] Device [1002:1638] (rev c1)

Detailed description of the problem (and investigation) here:
https://gitlab.freedesktop.org/drm/amd/-/issues/1799

Patch is a single line: reduce the polling delay in half, from 100uSec
to 50uSec when waiting for a change in state from the PMC after a
write command operation.

After changing the delay, I did not see a single failure on this
machine (I have this fix for now more than one week and s2idle worked
every single time on battery power).

Cc: stable@vger.kernel.org
Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Fabrizio Bertocci <fabriziobertocci@gmail.com>
Link: https://lore.kernel.org/r/CADtzkx7TdfbwtaVEXUdD6YXPey52E-nZVQNs+Z41DTx7gqMqtw@mail.gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/amd-pmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index b7e50ed050a8..841c44cd64c2 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -76,7 +76,7 @@
 #define AMD_CPU_ID_CZN			AMD_CPU_ID_RN
 #define AMD_CPU_ID_YC			0x14B5
 
-#define PMC_MSG_DELAY_MIN_US		100
+#define PMC_MSG_DELAY_MIN_US		50
 #define RESPONSE_REGISTER_LOOP_MAX	20000
 
 #define SOC_SUBSYSTEM_IP_MAX	12

From 01e16cb67cce68afaeb9c7bed72299036dbb0bc1 Mon Sep 17 00:00:00 2001
From: Alex Hung <alex.hung@canonical.com>
Date: Fri, 3 Dec 2021 14:28:10 -0700
Subject: [PATCH 28/78] platform/x86/intel: hid: add quirk to support Surface
 Go 3

Similar to other systems Surface Go 3 requires a DMI quirk to enable
5 button array for power and volume buttons.

Buglink: https://github.com/linux-surface/linux-surface/issues/595

Cc: stable@vger.kernel.org
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Link: https://lore.kernel.org/r/20211203212810.2666508-1-alex.hung@canonical.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/intel/hid.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/intel/hid.c b/drivers/platform/x86/intel/hid.c
index 08598942a6d7..13f8cf70b9ae 100644
--- a/drivers/platform/x86/intel/hid.c
+++ b/drivers/platform/x86/intel/hid.c
@@ -99,6 +99,13 @@ static const struct dmi_system_id button_array_table[] = {
 			DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
 		},
 	},
+	{
+		.ident = "Microsoft Surface Go 3",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
+		},
+	},
 	{ }
 };
 

From a90b38c58667142ecff2521481ed44286d46b140 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 28 Nov 2021 20:00:27 +0100
Subject: [PATCH 29/78] platform/x86: wmi: Replace read_takes_no_args with a
 flags field

Replace the wmi_block.read_takes_no_args bool field with
an unsigned long flags field, used together with test_bit()
and friends.

This is a preparation patch for fixing a driver->notify() vs ->probe()
race, which requires atomic flag handling.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-1-hdegoede@redhat.com
---
 drivers/platform/x86/wmi.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index c34341f4da76..46178e03aeca 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -57,6 +57,10 @@ static_assert(sizeof(typeof_member(struct guid_block, guid)) == 16);
 static_assert(sizeof(struct guid_block) == 20);
 static_assert(__alignof__(struct guid_block) == 1);
 
+enum {	/* wmi_block flags */
+	WMI_READ_TAKES_NO_ARGS,
+};
+
 struct wmi_block {
 	struct wmi_device dev;
 	struct list_head list;
@@ -67,8 +71,7 @@ struct wmi_block {
 	wmi_notify_handler handler;
 	void *handler_data;
 	u64 req_buf_size;
-
-	bool read_takes_no_args;
+	unsigned long flags;
 };
 
 
@@ -367,7 +370,7 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance,
 	wq_params[0].type = ACPI_TYPE_INTEGER;
 	wq_params[0].integer.value = instance;
 
-	if (instance == 0 && wblock->read_takes_no_args)
+	if (instance == 0 && test_bit(WMI_READ_TAKES_NO_ARGS, &wblock->flags))
 		input.count = 0;
 
 	/*
@@ -1113,7 +1116,7 @@ static int wmi_create_device(struct device *wmi_bus_dev,
 	 * laptops, WQxx may not be a method at all.)
 	 */
 	if (info->type != ACPI_TYPE_METHOD || info->param_count == 0)
-		wblock->read_takes_no_args = true;
+		set_bit(WMI_READ_TAKES_NO_ARGS, &wblock->flags);
 
 	kfree(info);
 

From 9918878676a5f9e99b98679f04b9e6c0f5426b0a Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 28 Nov 2021 20:00:28 +0100
Subject: [PATCH 30/78] platform/x86: wmi: Fix driver->notify() vs ->probe()
 race

The driver core sets struct device->driver before calling out
to the bus' probe() method, this leaves a window where an ACPI
notify may happen on the WMI object before the driver's
probe() method has completed running, causing e.g. the
driver's notify() callback to get called with drvdata
not yet being set leading to a NULL pointer deref.

At a check for this to the WMI core, ensuring that the notify()
callback is not called before the driver is ready.

Fixes: 1686f5444546 ("platform/x86: wmi: Incorporate acpi_install_notify_handler")
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-2-hdegoede@redhat.com
---
 drivers/platform/x86/wmi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 46178e03aeca..02aba274c4bc 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -59,6 +59,7 @@ static_assert(__alignof__(struct guid_block) == 1);
 
 enum {	/* wmi_block flags */
 	WMI_READ_TAKES_NO_ARGS,
+	WMI_PROBED,
 };
 
 struct wmi_block {
@@ -1008,6 +1009,7 @@ static int wmi_dev_probe(struct device *dev)
 		}
 	}
 
+	set_bit(WMI_PROBED, &wblock->flags);
 	return 0;
 
 probe_misc_failure:
@@ -1025,6 +1027,8 @@ static void wmi_dev_remove(struct device *dev)
 	struct wmi_block *wblock = dev_to_wblock(dev);
 	struct wmi_driver *wdriver = drv_to_wdrv(dev->driver);
 
+	clear_bit(WMI_PROBED, &wblock->flags);
+
 	if (wdriver->filter_callback) {
 		misc_deregister(&wblock->char_dev);
 		kfree(wblock->char_dev.name);
@@ -1322,7 +1326,7 @@ static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
 		return;
 
 	/* If a driver is bound, then notify the driver. */
-	if (wblock->dev.dev.driver) {
+	if (test_bit(WMI_PROBED, &wblock->flags) && wblock->dev.dev.driver) {
 		struct wmi_driver *driver = drv_to_wdrv(wblock->dev.dev.driver);
 		struct acpi_buffer evdata = { ACPI_ALLOCATE_BUFFER, NULL };
 		acpi_status status;

From 8c33915d77a565b8b5d44e6368e22b6ea300b7a8 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 28 Nov 2021 20:00:29 +0100
Subject: [PATCH 31/78] platform/x86: wmi: Add no_notify_data flag to struct
 wmi_driver

Some WMI implementations do notifies on WMI objects without a _WED method
allow WMI drivers to indicate that _WED should not be called for notifies
on the WMI objects the driver is bound to.

Instead the driver's notify callback will simply be called with a NULL
data argument.

Reported-by: Yauhen Kharuzhy <jekhor@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-3-hdegoede@redhat.com
---
 drivers/platform/x86/wmi.c | 10 ++++++----
 include/linux/wmi.h        |  1 +
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 02aba274c4bc..58a23a9adbef 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1331,10 +1331,12 @@ static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
 		struct acpi_buffer evdata = { ACPI_ALLOCATE_BUFFER, NULL };
 		acpi_status status;
 
-		status = get_event_data(wblock, &evdata);
-		if (ACPI_FAILURE(status)) {
-			dev_warn(&wblock->dev.dev, "failed to get event data\n");
-			return;
+		if (!driver->no_notify_data) {
+			status = get_event_data(wblock, &evdata);
+			if (ACPI_FAILURE(status)) {
+				dev_warn(&wblock->dev.dev, "failed to get event data\n");
+				return;
+			}
 		}
 
 		if (driver->notify)
diff --git a/include/linux/wmi.h b/include/linux/wmi.h
index 2cb3913c1f50..b88d7b58e61e 100644
--- a/include/linux/wmi.h
+++ b/include/linux/wmi.h
@@ -35,6 +35,7 @@ extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
 struct wmi_driver {
 	struct device_driver driver;
 	const struct wmi_device_id *id_table;
+	bool no_notify_data;
 
 	int (*probe)(struct wmi_device *wdev, const void *context);
 	void (*remove)(struct wmi_device *wdev);

From c0549b72d99df4616632b6b7dd0e82c6bf49b021 Mon Sep 17 00:00:00 2001
From: Yauhen Kharuzhy <jekhor@gmail.com>
Date: Sun, 28 Nov 2021 20:00:30 +0100
Subject: [PATCH 32/78] platform/x86: lenovo-yogabook-wmi: Add driver for
 Lenovo Yoga Book

Add driver to handle WMI events, control the keyboard backlight and
bind/unbind the keyboard-touch / digitizer driver so that only one
is active at a time.

It may seem a bit weird to handle the toggling of the modes in the
kernel, but the hw actually expects only 1 device to be active
at a time.

Changes by Hans de Goede:
- Whole bunch of cleanups
- Make the kernel do the driver bind/unbind itself instead of
  sending events to userspace and requiring a special userspace
  daemon to deal with this

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Co-developed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-4-hdegoede@redhat.com
---
 drivers/platform/x86/Kconfig               |  13 +
 drivers/platform/x86/Makefile              |   1 +
 drivers/platform/x86/lenovo-yogabook-wmi.c | 339 +++++++++++++++++++++
 3 files changed, 353 insertions(+)
 create mode 100644 drivers/platform/x86/lenovo-yogabook-wmi.c

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 7400bc5da5be..961f33bea1f1 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -127,6 +127,19 @@ config GIGABYTE_WMI
 	  To compile this driver as a module, choose M here: the module will
 	  be called gigabyte-wmi.
 
+config YOGABOOK_WMI
+	tristate "Lenovo Yoga Book tablet WMI key driver"
+	depends on ACPI_WMI
+	depends on INPUT
+	select LEDS_CLASS
+	select NEW_LEDS
+	help
+	  Say Y here if you want to support the 'Pen' key and keyboard backlight
+	  control on the Lenovo Yoga Book tablets.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called lenovo-yogabook-wmi.
+
 config ACERHDF
 	tristate "Acer Aspire One temperature and fan driver"
 	depends on ACPI && THERMAL
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 219478061683..dfb7ca88f012 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NVIDIA_WMI_EC_BACKLIGHT)	+= nvidia-wmi-ec-backlight.o
 obj-$(CONFIG_PEAQ_WMI)			+= peaq-wmi.o
 obj-$(CONFIG_XIAOMI_WMI)		+= xiaomi-wmi.o
 obj-$(CONFIG_GIGABYTE_WMI)		+= gigabyte-wmi.o
+obj-$(CONFIG_YOGABOOK_WMI)		+= lenovo-yogabook-wmi.o
 
 # Acer
 obj-$(CONFIG_ACERHDF)		+= acerhdf.o
diff --git a/drivers/platform/x86/lenovo-yogabook-wmi.c b/drivers/platform/x86/lenovo-yogabook-wmi.c
new file mode 100644
index 000000000000..751e45b2a040
--- /dev/null
+++ b/drivers/platform/x86/lenovo-yogabook-wmi.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/* WMI driver for Lenovo Yoga Book YB1-X90* / -X91* tablets */
+
+#include <linux/acpi.h>
+#include <linux/devm-helpers.h>
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/wmi.h>
+#include <linux/workqueue.h>
+
+#define YB_MBTN_EVENT_GUID	"243FEC1D-1963-41C1-8100-06A9D82A94B4"
+#define YB_MBTN_METHOD_GUID	"742B0CA1-0B20-404B-9CAA-AEFCABF30CE0"
+
+#define YB_PAD_ENABLE	1
+#define YB_PAD_DISABLE	2
+#define YB_LIGHTUP_BTN	3
+
+#define YB_KBD_BL_DEFAULT 128
+
+/* flags */
+enum {
+	YB_KBD_IS_ON,
+	YB_DIGITIZER_IS_ON,
+	YB_DIGITIZER_MODE,
+	YB_SUSPENDED,
+};
+
+struct yogabook_wmi {
+	struct wmi_device *wdev;
+	struct acpi_device *kbd_adev;
+	struct acpi_device *dig_adev;
+	struct device *kbd_dev;
+	struct device *dig_dev;
+	struct work_struct work;
+	struct led_classdev kbd_bl_led;
+	unsigned long flags;
+	uint8_t brightness;
+};
+
+static int yogabook_wmi_do_action(struct wmi_device *wdev, int action)
+{
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_buffer input;
+	acpi_status status;
+	u32 dummy_arg = 0;
+
+	dev_dbg(&wdev->dev, "Do action: %d\n", action);
+
+	input.pointer = &dummy_arg;
+	input.length = sizeof(dummy_arg);
+
+	status = wmi_evaluate_method(YB_MBTN_METHOD_GUID, 0, action, &input,
+				     &output);
+	if (ACPI_FAILURE(status)) {
+		dev_err(&wdev->dev, "Calling WMI method failure: 0x%x\n",
+			status);
+		return status;
+	}
+
+	kfree(output.pointer);
+
+	return 0;
+}
+
+/*
+ * To control keyboard backlight, call the method KBLC() of the TCS1 ACPI
+ * device (Goodix touchpad acts as virtual sensor keyboard).
+ */
+static int yogabook_wmi_set_kbd_backlight(struct wmi_device *wdev,
+					  uint8_t level)
+{
+	struct yogabook_wmi *data = dev_get_drvdata(&wdev->dev);
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_object_list input;
+	union acpi_object param;
+	acpi_status status;
+
+	if (data->kbd_adev->power.state != ACPI_STATE_D0) {
+		dev_warn(&wdev->dev, "keyboard touchscreen not in D0, cannot set brightness\n");
+		return -ENXIO;
+	}
+
+	dev_dbg(&wdev->dev, "Set KBLC level to %u\n", level);
+
+	input.count = 1;
+	input.pointer = &param;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 255 - level;
+
+	status = acpi_evaluate_object(acpi_device_handle(data->kbd_adev), "KBLC",
+				      &input, &output);
+	if (ACPI_FAILURE(status)) {
+		dev_err(&wdev->dev, "Failed to call KBLC method: 0x%x\n", status);
+		return status;
+	}
+
+	kfree(output.pointer);
+	return 0;
+}
+
+static void yogabook_wmi_work(struct work_struct *work)
+{
+	struct yogabook_wmi *data = container_of(work, struct yogabook_wmi, work);
+	struct device *dev = &data->wdev->dev;
+	bool kbd_on, digitizer_on;
+	int r;
+
+	if (test_bit(YB_SUSPENDED, &data->flags))
+		return;
+
+	if (test_bit(YB_DIGITIZER_MODE, &data->flags)) {
+		digitizer_on = true;
+		kbd_on = false;
+	} else {
+		kbd_on = true;
+		digitizer_on = false;
+	}
+
+	if (!kbd_on && test_bit(YB_KBD_IS_ON, &data->flags)) {
+		/*
+		 * Must be done before releasing the keyboard touchscreen driver,
+		 * so that the keyboard touchscreen dev is still in D0.
+		 */
+		yogabook_wmi_set_kbd_backlight(data->wdev, 0);
+		device_release_driver(data->kbd_dev);
+		clear_bit(YB_KBD_IS_ON, &data->flags);
+	}
+
+	if (!digitizer_on && test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
+		yogabook_wmi_do_action(data->wdev, YB_PAD_DISABLE);
+		device_release_driver(data->dig_dev);
+		clear_bit(YB_DIGITIZER_IS_ON, &data->flags);
+	}
+
+	if (kbd_on && !test_bit(YB_KBD_IS_ON, &data->flags)) {
+		r = device_reprobe(data->kbd_dev);
+		if (r)
+			dev_warn(dev, "Reprobe of keyboard touchscreen failed: %d\n", r);
+
+		yogabook_wmi_set_kbd_backlight(data->wdev, data->brightness);
+		set_bit(YB_KBD_IS_ON, &data->flags);
+	}
+
+	if (digitizer_on && !test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
+		r = device_reprobe(data->dig_dev);
+		if (r)
+			dev_warn(dev, "Reprobe of digitizer failed: %d\n", r);
+
+		yogabook_wmi_do_action(data->wdev, YB_PAD_ENABLE);
+		set_bit(YB_DIGITIZER_IS_ON, &data->flags);
+	}
+}
+
+static void yogabook_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
+{
+	struct yogabook_wmi *data = dev_get_drvdata(&wdev->dev);
+
+	if (test_bit(YB_SUSPENDED, &data->flags))
+		return;
+
+	if (test_bit(YB_DIGITIZER_MODE, &data->flags))
+		clear_bit(YB_DIGITIZER_MODE, &data->flags);
+	else
+		set_bit(YB_DIGITIZER_MODE, &data->flags);
+
+	/*
+	 * We are called from the ACPI core and the driver [un]binding which is
+	 * done also needs ACPI functions, use a workqueue to avoid deadlocking.
+	 */
+	schedule_work(&data->work);
+}
+
+static enum led_brightness kbd_brightness_get(struct led_classdev *cdev)
+{
+	struct yogabook_wmi *data =
+		container_of(cdev, struct yogabook_wmi, kbd_bl_led);
+
+	return data->brightness;
+}
+
+static int kbd_brightness_set(struct led_classdev *cdev,
+			      enum led_brightness value)
+{
+	struct yogabook_wmi *data =
+		container_of(cdev, struct yogabook_wmi, kbd_bl_led);
+	struct wmi_device *wdev = data->wdev;
+
+	if ((value < 0) || (value > 255))
+		return -EINVAL;
+
+	data->brightness = value;
+
+	if (data->kbd_adev->power.state != ACPI_STATE_D0)
+		return 0;
+
+	return yogabook_wmi_set_kbd_backlight(wdev, data->brightness);
+}
+
+static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+	struct yogabook_wmi *data;
+	int r;
+
+	data = devm_kzalloc(&wdev->dev, sizeof(struct yogabook_wmi), GFP_KERNEL);
+	if (data == NULL)
+		return -ENOMEM;
+
+	dev_set_drvdata(&wdev->dev, data);
+
+	data->wdev = wdev;
+	data->brightness = YB_KBD_BL_DEFAULT;
+	set_bit(YB_KBD_IS_ON, &data->flags);
+	set_bit(YB_DIGITIZER_IS_ON, &data->flags);
+
+	r = devm_work_autocancel(&wdev->dev, &data->work, yogabook_wmi_work);
+	if (r)
+		return r;
+
+	data->kbd_adev = acpi_dev_get_first_match_dev("GDIX1001", NULL, -1);
+	if (!data->kbd_adev) {
+		dev_err(&wdev->dev, "Cannot find the touchpad device in ACPI tables\n");
+		return -ENODEV;
+	}
+
+	data->dig_adev = acpi_dev_get_first_match_dev("WCOM0019", NULL, -1);
+	if (!data->dig_adev) {
+		dev_err(&wdev->dev, "Cannot find the digitizer device in ACPI tables\n");
+		r = -ENODEV;
+		goto error_put_devs;
+	}
+
+	data->kbd_dev = get_device(acpi_get_first_physical_node(data->kbd_adev));
+	if (!data->kbd_dev || !data->kbd_dev->driver) {
+		r = -EPROBE_DEFER;
+		goto error_put_devs;
+	}
+
+	data->dig_dev = get_device(acpi_get_first_physical_node(data->dig_adev));
+	if (!data->dig_dev || !data->dig_dev->driver) {
+		r = -EPROBE_DEFER;
+		goto error_put_devs;
+	}
+
+	schedule_work(&data->work);
+
+	data->kbd_bl_led.name = "ybwmi::kbd_backlight";
+	data->kbd_bl_led.brightness_set_blocking = kbd_brightness_set;
+	data->kbd_bl_led.brightness_get = kbd_brightness_get;
+	data->kbd_bl_led.max_brightness = 255;
+
+	r = devm_led_classdev_register(&wdev->dev, &data->kbd_bl_led);
+	if (r < 0) {
+		dev_err_probe(&wdev->dev, r, "Registering backlight LED device\n");
+		goto error_put_devs;
+	}
+
+	return 0;
+
+error_put_devs:
+	put_device(data->dig_dev);
+	put_device(data->kbd_dev);
+	acpi_dev_put(data->dig_adev);
+	acpi_dev_put(data->kbd_adev);
+	return r;
+}
+
+static void yogabook_wmi_remove(struct wmi_device *wdev)
+{
+	struct yogabook_wmi *data = dev_get_drvdata(&wdev->dev);
+
+	put_device(data->dig_dev);
+	put_device(data->kbd_dev);
+	acpi_dev_put(data->dig_adev);
+	acpi_dev_put(data->kbd_adev);
+}
+
+static int __maybe_unused yogabook_wmi_suspend(struct device *dev)
+{
+	struct wmi_device *wdev = container_of(dev, struct wmi_device, dev);
+	struct yogabook_wmi *data = dev_get_drvdata(dev);
+
+	set_bit(YB_SUSPENDED, &data->flags);
+
+	flush_work(&data->work);
+
+	/* Turn off the pen button at sleep */
+	if (test_bit(YB_DIGITIZER_IS_ON, &data->flags))
+		yogabook_wmi_do_action(wdev, YB_PAD_DISABLE);
+
+	return 0;
+}
+
+static int __maybe_unused yogabook_wmi_resume(struct device *dev)
+{
+	struct wmi_device *wdev = container_of(dev, struct wmi_device, dev);
+	struct yogabook_wmi *data = dev_get_drvdata(dev);
+
+	if (test_bit(YB_KBD_IS_ON, &data->flags)) {
+		/* Ensure keyboard touchpad is on before we call KBLC() */
+		acpi_device_set_power(data->kbd_adev, ACPI_STATE_D0);
+		yogabook_wmi_set_kbd_backlight(wdev, data->brightness);
+	}
+
+	if (test_bit(YB_DIGITIZER_IS_ON, &data->flags))
+		yogabook_wmi_do_action(wdev, YB_PAD_ENABLE);
+
+	clear_bit(YB_SUSPENDED, &data->flags);
+
+	return 0;
+}
+
+static const struct wmi_device_id yogabook_wmi_id_table[] = {
+	{
+		.guid_string = YB_MBTN_EVENT_GUID,
+	},
+	{ } /* Terminating entry */
+};
+
+static SIMPLE_DEV_PM_OPS(yogabook_wmi_pm_ops,
+			 yogabook_wmi_suspend, yogabook_wmi_resume);
+
+static struct wmi_driver yogabook_wmi_driver = {
+	.driver = {
+		.name = "yogabook-wmi",
+		.pm = &yogabook_wmi_pm_ops,
+	},
+	.no_notify_data = true,
+	.id_table = yogabook_wmi_id_table,
+	.probe = yogabook_wmi_probe,
+	.remove = yogabook_wmi_remove,
+	.notify = yogabook_wmi_notify,
+};
+module_wmi_driver(yogabook_wmi_driver);
+
+MODULE_DEVICE_TABLE(wmi, yogabook_wmi_id_table);
+MODULE_AUTHOR("Yauhen Kharuzhy");
+MODULE_DESCRIPTION("Lenovo Yoga Book WMI driver");
+MODULE_LICENSE("GPL v2");

From 1c5ec99891bb6a2d5487b9ab7c259698a601b95c Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 28 Nov 2021 20:00:31 +0100
Subject: [PATCH 33/78] platform/x86: lenovo-yogabook-wmi: Add support for hall
 sensor on the back

On the back of the device there is a Hall sensor connected to the
"INT33FF:02" GPIO controller pin 18, which gets triggered when the
device is fully folded into tablet-mode (when the back of the display
touches the back of the keyboard).

Use this to disable both the touch-keyboard and the digitizer when
the tablet is fully folded into tablet-mode.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-5-hdegoede@redhat.com
---
 drivers/platform/x86/lenovo-yogabook-wmi.c | 71 +++++++++++++++++++++-
 1 file changed, 70 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/lenovo-yogabook-wmi.c b/drivers/platform/x86/lenovo-yogabook-wmi.c
index 751e45b2a040..5f4bd1eec38a 100644
--- a/drivers/platform/x86/lenovo-yogabook-wmi.c
+++ b/drivers/platform/x86/lenovo-yogabook-wmi.c
@@ -3,6 +3,9 @@
 
 #include <linux/acpi.h>
 #include <linux/devm-helpers.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/leds.h>
 #include <linux/wmi.h>
@@ -22,6 +25,7 @@ enum {
 	YB_KBD_IS_ON,
 	YB_DIGITIZER_IS_ON,
 	YB_DIGITIZER_MODE,
+	YB_TABLET_MODE,
 	YB_SUSPENDED,
 };
 
@@ -31,6 +35,8 @@ struct yogabook_wmi {
 	struct acpi_device *dig_adev;
 	struct device *kbd_dev;
 	struct device *dig_dev;
+	struct gpio_desc *backside_hall_gpio;
+	int backside_hall_irq;
 	struct work_struct work;
 	struct led_classdev kbd_bl_led;
 	unsigned long flags;
@@ -109,7 +115,10 @@ static void yogabook_wmi_work(struct work_struct *work)
 	if (test_bit(YB_SUSPENDED, &data->flags))
 		return;
 
-	if (test_bit(YB_DIGITIZER_MODE, &data->flags)) {
+	if (test_bit(YB_TABLET_MODE, &data->flags)) {
+		kbd_on = false;
+		digitizer_on = false;
+	} else if (test_bit(YB_DIGITIZER_MODE, &data->flags)) {
 		digitizer_on = true;
 		kbd_on = false;
 	} else {
@@ -171,6 +180,20 @@ static void yogabook_wmi_notify(struct wmi_device *wdev, union acpi_object *dumm
 	schedule_work(&data->work);
 }
 
+static irqreturn_t yogabook_backside_hall_irq(int irq, void *_data)
+{
+	struct yogabook_wmi *data = _data;
+
+	if (gpiod_get_value(data->backside_hall_gpio))
+		set_bit(YB_TABLET_MODE, &data->flags);
+	else
+		clear_bit(YB_TABLET_MODE, &data->flags);
+
+	schedule_work(&data->work);
+
+	return IRQ_HANDLED;
+}
+
 static enum led_brightness kbd_brightness_get(struct led_classdev *cdev)
 {
 	struct yogabook_wmi *data =
@@ -197,6 +220,19 @@ static int kbd_brightness_set(struct led_classdev *cdev,
 	return yogabook_wmi_set_kbd_backlight(wdev, data->brightness);
 }
 
+static struct gpiod_lookup_table yogabook_wmi_gpios = {
+	.dev_id		= "243FEC1D-1963-41C1-8100-06A9D82A94B4",
+	.table		= {
+		GPIO_LOOKUP("INT33FF:02", 18, "backside_hall_sw", GPIO_ACTIVE_LOW),
+		{}
+	},
+};
+
+static void yogabook_wmi_rm_gpio_lookup(void *unused)
+{
+	gpiod_remove_lookup_table(&yogabook_wmi_gpios);
+}
+
 static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context)
 {
 	struct yogabook_wmi *data;
@@ -242,6 +278,36 @@ static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context)
 		goto error_put_devs;
 	}
 
+	gpiod_add_lookup_table(&yogabook_wmi_gpios);
+
+	r = devm_add_action_or_reset(&wdev->dev, yogabook_wmi_rm_gpio_lookup, NULL);
+	if (r)
+		goto error_put_devs;
+
+	data->backside_hall_gpio =
+		devm_gpiod_get(&wdev->dev, "backside_hall_sw", GPIOD_IN);
+	if (IS_ERR(data->backside_hall_gpio)) {
+		r = PTR_ERR(data->backside_hall_gpio);
+		dev_err_probe(&wdev->dev, r, "Getting backside_hall_sw GPIO\n");
+		goto error_put_devs;
+	}
+
+	r = gpiod_to_irq(data->backside_hall_gpio);
+	if (r < 0) {
+		dev_err_probe(&wdev->dev, r, "Getting backside_hall_sw IRQ\n");
+		goto error_put_devs;
+	}
+	data->backside_hall_irq = r;
+
+	r = devm_request_irq(&wdev->dev, data->backside_hall_irq,
+			     yogabook_backside_hall_irq,
+			     IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+			     "backside_hall_sw", data);
+	if (r) {
+		dev_err_probe(&wdev->dev, r, "Requesting backside_hall_sw IRQ\n");
+		goto error_put_devs;
+	}
+
 	schedule_work(&data->work);
 
 	data->kbd_bl_led.name = "ybwmi::kbd_backlight";
@@ -307,6 +373,9 @@ static int __maybe_unused yogabook_wmi_resume(struct device *dev)
 
 	clear_bit(YB_SUSPENDED, &data->flags);
 
+	/* Check for YB_TABLET_MODE changes made during suspend */
+	schedule_work(&data->work);
+
 	return 0;
 }
 

From 272479928172edf0d2f2259ca0bdb414328e11a4 Mon Sep 17 00:00:00 2001
From: Jarrett Schultz <jaschultz@microsoft.com>
Date: Thu, 2 Dec 2021 11:16:27 -0800
Subject: [PATCH 34/78] platform: surface: Propagate ACPI Dependency

Since the Surface XBL Driver does not depend on ACPI, the
platform/surface directory as a whole no longer depends on ACPI. With
respect to this, the ACPI dependency is moved into each config that depends
on ACPI individually.

Signed-off-by: Jarrett Schultz <jaschultz@microsoft.com>
Link: https://lore.kernel.org/r/20211202191630.12450-3-jaschultz@microsoft.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/surface/Kconfig            | 7 ++++++-
 drivers/platform/surface/aggregator/Kconfig | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/surface/Kconfig b/drivers/platform/surface/Kconfig
index 3105f651614f..5f0578e25f71 100644
--- a/drivers/platform/surface/Kconfig
+++ b/drivers/platform/surface/Kconfig
@@ -5,7 +5,6 @@
 
 menuconfig SURFACE_PLATFORMS
 	bool "Microsoft Surface Platform-Specific Device Drivers"
-	depends on ACPI
 	default y
 	help
 	  Say Y here to get to see options for platform-specific device drivers
@@ -30,12 +29,14 @@ config SURFACE3_WMI
 
 config SURFACE_3_BUTTON
 	tristate "Power/home/volume buttons driver for Microsoft Surface 3 tablet"
+	depends on ACPI
 	depends on KEYBOARD_GPIO && I2C
 	help
 	  This driver handles the power/home/volume buttons on the Microsoft Surface 3 tablet.
 
 config SURFACE_3_POWER_OPREGION
 	tristate "Surface 3 battery platform operation region support"
+	depends on ACPI
 	depends on I2C
 	help
 	  This driver provides support for ACPI operation
@@ -126,6 +127,7 @@ config SURFACE_DTX
 
 config SURFACE_GPE
 	tristate "Surface GPE/Lid Support Driver"
+	depends on ACPI
 	depends on DMI
 	help
 	  This driver marks the GPEs related to the ACPI lid device found on
@@ -135,6 +137,7 @@ config SURFACE_GPE
 
 config SURFACE_HOTPLUG
 	tristate "Surface Hot-Plug Driver"
+	depends on ACPI
 	depends on GPIOLIB
 	help
 	  Driver for out-of-band hot-plug event signaling on Microsoft Surface
@@ -154,6 +157,7 @@ config SURFACE_HOTPLUG
 
 config SURFACE_PLATFORM_PROFILE
 	tristate "Surface Platform Profile Driver"
+	depends on ACPI
 	depends on SURFACE_AGGREGATOR_REGISTRY
 	select ACPI_PLATFORM_PROFILE
 	help
@@ -176,6 +180,7 @@ config SURFACE_PLATFORM_PROFILE
 
 config SURFACE_PRO3_BUTTON
 	tristate "Power/home/volume buttons driver for Microsoft Surface Pro 3/4 tablet"
+	depends on ACPI
 	depends on INPUT
 	help
 	  This driver handles the power/home/volume buttons on the Microsoft Surface Pro 3/4 tablet.
diff --git a/drivers/platform/surface/aggregator/Kconfig b/drivers/platform/surface/aggregator/Kconfig
index fd6dc452f3e8..cab020324256 100644
--- a/drivers/platform/surface/aggregator/Kconfig
+++ b/drivers/platform/surface/aggregator/Kconfig
@@ -4,6 +4,7 @@
 menuconfig SURFACE_AGGREGATOR
 	tristate "Microsoft Surface System Aggregator Module Subsystem and Drivers"
 	depends on SERIAL_DEV_BUS
+	depends on ACPI
 	select CRC_CCITT
 	help
 	  The Surface System Aggregator Module (Surface SAM or SSAM) is an

From 692562abcc6ecc8c8afe4c5a42ac711515481089 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 6 Dec 2021 17:15:21 +0200
Subject: [PATCH 35/78] platform/x86: hp_accel: Use SIMPLE_DEV_PM_OPS() for PM
 ops

After the commit 34570a898eef ("platform/x86: hp_accel: Remove
_INI method call") there is no need to have separate methods for
resume and restore, hence we may fold them together and use
SIMPLE_DEV_PM_OPS() for PM ops.

While at it, switch to use __maybe_unused attribute.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211206151521.22578-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/hp_accel.c | 27 ++++-----------------------
 1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
index 435a91fe2568..e9f852f7c27f 100644
--- a/drivers/platform/x86/hp_accel.c
+++ b/drivers/platform/x86/hp_accel.c
@@ -355,39 +355,20 @@ static int lis3lv02d_remove(struct platform_device *device)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int lis3lv02d_suspend(struct device *dev)
+static int __maybe_unused lis3lv02d_suspend(struct device *dev)
 {
 	/* make sure the device is off when we suspend */
 	lis3lv02d_poweroff(&lis3_dev);
 	return 0;
 }
 
-static int lis3lv02d_resume(struct device *dev)
+static int __maybe_unused lis3lv02d_resume(struct device *dev)
 {
 	lis3lv02d_poweron(&lis3_dev);
 	return 0;
 }
 
-static int lis3lv02d_restore(struct device *dev)
-{
-	lis3lv02d_poweron(&lis3_dev);
-	return 0;
-}
-
-static const struct dev_pm_ops hp_accel_pm = {
-	.suspend = lis3lv02d_suspend,
-	.resume = lis3lv02d_resume,
-	.freeze = lis3lv02d_suspend,
-	.thaw = lis3lv02d_resume,
-	.poweroff = lis3lv02d_suspend,
-	.restore = lis3lv02d_restore,
-};
-
-#define HP_ACCEL_PM (&hp_accel_pm)
-#else
-#define HP_ACCEL_PM NULL
-#endif
+static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
 
 /* For the HP MDPS aka 3D Driveguard */
 static struct platform_driver lis3lv02d_driver = {
@@ -395,7 +376,7 @@ static struct platform_driver lis3lv02d_driver = {
 	.remove	= lis3lv02d_remove,
 	.driver	= {
 		.name	= "hp_accel",
-		.pm	= HP_ACCEL_PM,
+		.pm	= &hp_accel_pm,
 		.acpi_match_table = lis3lv02d_device_ids,
 	},
 };

From 1b0b6cc8030d08d2a24e9e5f85dc36c5a58200ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Wed, 24 Nov 2021 00:27:01 +0100
Subject: [PATCH 36/78] power: supply: add charge_behaviour attributes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This a revised version of
"[RFC] add standardized attributes for force_discharge and inhibit_charge" [0],
incorporating discussion results.

The biggest change is the switch from two boolean attributes to a single
enum attribute.

[0] https://lore.kernel.org/platform-driver-x86/21569a89-8303-8573-05fb-c2fec29983d1@gmail.com/

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20211123232704.25394-2-linux@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 Documentation/ABI/testing/sysfs-class-power | 14 ++++++++++++++
 include/linux/power_supply.h                |  7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index f7904efc4cfa..cece094764f8 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -455,6 +455,20 @@ Description:
 			      "Unknown", "Charging", "Discharging",
 			      "Not charging", "Full"
 
+What:		/sys/class/power_supply/<supply_name>/charge_behaviour
+Date:		November 2021
+Contact:	linux-pm@vger.kernel.org
+Description:
+		Represents the charging behaviour.
+
+		Access: Read, Write
+
+		Valid values:
+			================ ====================================
+			auto:            Charge normally, respect thresholds
+			inhibit-charge:  Do not charge while AC is attached
+			force-discharge: Force discharge while AC is attached
+
 What:		/sys/class/power_supply/<supply_name>/technology
 Date:		May 2007
 Contact:	linux-pm@vger.kernel.org
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 9ca1f120a211..70c333e86293 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -132,6 +132,7 @@ enum power_supply_property {
 	POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 	POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD, /* in percents! */
 	POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, /* in percents! */
+	POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
 	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
 	POWER_SUPPLY_PROP_INPUT_POWER_LIMIT,
@@ -202,6 +203,12 @@ enum power_supply_usb_type {
 	POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID,	/* Apple Charging Method */
 };
 
+enum power_supply_charge_behaviour {
+	POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO = 0,
+	POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE,
+	POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE,
+};
+
 enum power_supply_notifier_events {
 	PSY_EVENT_PROP_CHANGED,
 };

From 539b9c94ac83563842a27e8cc3de5164b15c4de0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Wed, 24 Nov 2021 00:27:02 +0100
Subject: [PATCH 37/78] power: supply: add helpers for charge_behaviour sysfs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

These helper functions can be used by drivers to implement their own
sysfs-attributes.
This is useful for ACPI-drivers extending the default ACPI-battery with
their own charge_behaviour attributes.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20211123232704.25394-3-linux@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/power/supply/power_supply_sysfs.c | 55 +++++++++++++++++++++++
 include/linux/power_supply.h              |  9 ++++
 2 files changed, 64 insertions(+)

diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index c3d7cbcd4fad..5e3b8c15ddbe 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -133,6 +133,12 @@ static const char * const POWER_SUPPLY_SCOPE_TEXT[] = {
 	[POWER_SUPPLY_SCOPE_DEVICE]	= "Device",
 };
 
+static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = {
+	[POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO]		= "auto",
+	[POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE]	= "inhibit-charge",
+	[POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE]	= "force-discharge",
+};
+
 static struct power_supply_attr power_supply_attrs[] = {
 	/* Properties of type `int' */
 	POWER_SUPPLY_ENUM_ATTR(STATUS),
@@ -484,3 +490,52 @@ out:
 
 	return ret;
 }
+
+ssize_t power_supply_charge_behaviour_show(struct device *dev,
+					   unsigned int available_behaviours,
+					   enum power_supply_charge_behaviour current_behaviour,
+					   char *buf)
+{
+	bool match = false, available, active;
+	ssize_t count = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
+		available = available_behaviours & BIT(i);
+		active = i == current_behaviour;
+
+		if (available && active) {
+			count += sysfs_emit_at(buf, count, "[%s] ",
+					       POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+			match = true;
+		} else if (available) {
+			count += sysfs_emit_at(buf, count, "%s ",
+					       POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+		}
+	}
+
+	if (!match) {
+		dev_warn(dev, "driver reporting unsupported charge behaviour\n");
+		return -EINVAL;
+	}
+
+	if (count)
+		buf[count - 1] = '\n';
+
+	return count;
+}
+EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
+
+int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
+{
+	int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
+
+	if (i < 0)
+		return i;
+
+	if (available_behaviours & BIT(i))
+		return i;
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 70c333e86293..71f0379c2af8 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -546,4 +546,13 @@ static inline
 void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {}
 #endif
 
+#ifdef CONFIG_SYSFS
+ssize_t power_supply_charge_behaviour_show(struct device *dev,
+					   unsigned int available_behaviours,
+					   enum power_supply_charge_behaviour behaviour,
+					   char *buf);
+
+int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf);
+#endif
+
 #endif /* __LINUX_POWER_SUPPLY_H__ */

From b55d416d48f5907f66218ae3d878e3bfb69ae4e6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Wed, 24 Nov 2021 00:27:03 +0100
Subject: [PATCH 38/78] platform/x86: thinkpad_acpi: support force-discharge
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This adds support for the force-discharge charge_behaviour through the
embedded controller of ThinkPads.

Co-developed-by: Thomas Koch <linrunner@gmx.net>
Signed-off-by: Thomas Koch <linrunner@gmx.net>
Co-developed-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20211123232704.25394-4-linux@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 131 ++++++++++++++++++++++++++-
 1 file changed, 127 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 38996e6e2a7a..4dea5337ec09 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9214,6 +9214,8 @@ static struct ibm_struct mute_led_driver_data = {
 #define SET_START	"BCCS"
 #define GET_STOP	"BCSG"
 #define SET_STOP	"BCSS"
+#define GET_DISCHARGE	"BDSG"
+#define SET_DISCHARGE	"BDSS"
 
 enum {
 	BAT_ANY = 0,
@@ -9230,6 +9232,7 @@ enum {
 	/* This is used in the get/set helpers */
 	THRESHOLD_START,
 	THRESHOLD_STOP,
+	FORCE_DISCHARGE,
 };
 
 struct tpacpi_battery_data {
@@ -9237,6 +9240,7 @@ struct tpacpi_battery_data {
 	int start_support;
 	int charge_stop;
 	int stop_support;
+	unsigned int charge_behaviours;
 };
 
 struct tpacpi_battery_driver_data {
@@ -9294,6 +9298,12 @@ static int tpacpi_battery_get(int what, int battery, int *ret)
 		if (*ret == 0)
 			*ret = 100;
 		return 0;
+	case FORCE_DISCHARGE:
+		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
+			return -ENODEV;
+		/* The force discharge status is in bit 0 */
+		*ret = *ret & 0x01;
+		return 0;
 	default:
 		pr_crit("wrong parameter: %d", what);
 		return -EINVAL;
@@ -9322,12 +9332,49 @@ static int tpacpi_battery_set(int what, int battery, int value)
 			return -ENODEV;
 		}
 		return 0;
+	case FORCE_DISCHARGE:
+		/* Force discharge is in bit 0,
+		 * break on AC attach is in bit 1 (won't work on some ThinkPads),
+		 * battery ID is in bits 8-9, 2 bits.
+		 */
+		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
+			pr_err("failed to set force discharge on %d", battery);
+			return -ENODEV;
+		}
+		return 0;
 	default:
 		pr_crit("wrong parameter: %d", what);
 		return -EINVAL;
 	}
 }
 
+static int tpacpi_battery_set_validate(int what, int battery, int value)
+{
+	int ret, v;
+
+	ret = tpacpi_battery_set(what, battery, value);
+	if (ret < 0)
+		return ret;
+
+	ret = tpacpi_battery_get(what, battery, &v);
+	if (ret < 0)
+		return ret;
+
+	if (v == value)
+		return 0;
+
+	msleep(500);
+
+	ret = tpacpi_battery_get(what, battery, &v);
+	if (ret < 0)
+		return ret;
+
+	if (v == value)
+		return 0;
+
+	return -EIO;
+}
+
 static int tpacpi_battery_probe(int battery)
 {
 	int ret = 0;
@@ -9340,6 +9387,8 @@ static int tpacpi_battery_probe(int battery)
 	 * 2) Check for support
 	 * 3) Get the current stop threshold
 	 * 4) Check for support
+	 * 5) Get the current force discharge status
+	 * 6) Check for support
 	 */
 	if (acpi_has_method(hkey_handle, GET_START)) {
 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
@@ -9376,10 +9425,25 @@ static int tpacpi_battery_probe(int battery)
 			return -ENODEV;
 		}
 	}
-	pr_info("battery %d registered (start %d, stop %d)",
-			battery,
-			battery_info.batteries[battery].charge_start,
-			battery_info.batteries[battery].charge_stop);
+	if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
+		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
+			pr_err("Error probing battery discharge; %d\n", battery);
+			return -ENODEV;
+		}
+		/* Support is marked in bit 8 */
+		if (ret & BIT(8))
+			battery_info.batteries[battery].charge_behaviours |=
+				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
+	}
+
+	battery_info.batteries[battery].charge_behaviours |=
+		BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
+
+	pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
+		battery,
+		battery_info.batteries[battery].charge_start,
+		battery_info.batteries[battery].charge_stop,
+		battery_info.batteries[battery].charge_behaviours);
 
 	return 0;
 }
@@ -9514,6 +9578,28 @@ static ssize_t charge_control_end_threshold_show(struct device *device,
 	return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
 }
 
+static ssize_t charge_behaviour_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
+	struct power_supply *supply = to_power_supply(dev);
+	unsigned int available;
+	int ret, battery;
+
+	battery = tpacpi_battery_get_id(supply->desc->name);
+	available = battery_info.batteries[battery].charge_behaviours;
+
+	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
+		if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
+			return -ENODEV;
+		if (ret)
+			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
+	}
+
+	return power_supply_charge_behaviour_show(dev, available, active, buf);
+}
+
 static ssize_t charge_control_start_threshold_store(struct device *dev,
 				struct device_attribute *attr,
 				const char *buf, size_t count)
@@ -9528,8 +9614,44 @@ static ssize_t charge_control_end_threshold_store(struct device *dev,
 	return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
 }
 
+static ssize_t charge_behaviour_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct power_supply *supply = to_power_supply(dev);
+	int selected, battery, ret = 0;
+	unsigned int available;
+
+	battery = tpacpi_battery_get_id(supply->desc->name);
+	available = battery_info.batteries[battery].charge_behaviours;
+	selected = power_supply_charge_behaviour_parse(available, buf);
+
+	if (selected < 0)
+		return selected;
+
+	switch (selected) {
+	case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
+		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
+			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
+		if (ret < 0)
+			return ret;
+		break;
+	case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
+		ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1);
+		if (ret < 0)
+			return ret;
+		break;
+	default:
+		dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
+		return -EINVAL;
+	}
+
+	return count;
+}
+
 static DEVICE_ATTR_RW(charge_control_start_threshold);
 static DEVICE_ATTR_RW(charge_control_end_threshold);
+static DEVICE_ATTR_RW(charge_behaviour);
 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
 	charge_start_threshold,
 	0644,
@@ -9548,6 +9670,7 @@ static struct attribute *tpacpi_battery_attrs[] = {
 	&dev_attr_charge_control_end_threshold.attr,
 	&dev_attr_charge_start_threshold.attr,
 	&dev_attr_charge_stop_threshold.attr,
+	&dev_attr_charge_behaviour.attr,
 	NULL,
 };
 

From 400cffd5f4eaf34939530b3a044e31655188b1f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Wed, 24 Nov 2021 00:27:04 +0100
Subject: [PATCH 39/78] platform/x86: thinkpad_acpi: support inhibit-charge
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This adds support for the inhibit-charge charge_behaviour through the
embedded controller of ThinkPads.

Co-developed-by: Thomas Koch <linrunner@gmx.net>
Signed-off-by: Thomas Koch <linrunner@gmx.net>
Co-developed-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20211123232704.25394-5-linux@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 64 +++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 4dea5337ec09..c72e4e62dfdb 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9216,6 +9216,8 @@ static struct ibm_struct mute_led_driver_data = {
 #define SET_STOP	"BCSS"
 #define GET_DISCHARGE	"BDSG"
 #define SET_DISCHARGE	"BDSS"
+#define GET_INHIBIT	"BICG"
+#define SET_INHIBIT	"BICS"
 
 enum {
 	BAT_ANY = 0,
@@ -9233,6 +9235,7 @@ enum {
 	THRESHOLD_START,
 	THRESHOLD_STOP,
 	FORCE_DISCHARGE,
+	INHIBIT_CHARGE,
 };
 
 struct tpacpi_battery_data {
@@ -9304,6 +9307,12 @@ static int tpacpi_battery_get(int what, int battery, int *ret)
 		/* The force discharge status is in bit 0 */
 		*ret = *ret & 0x01;
 		return 0;
+	case INHIBIT_CHARGE:
+		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
+			return -ENODEV;
+		/* The inhibit charge status is in bit 0 */
+		*ret = *ret & 0x01;
+		return 0;
 	default:
 		pr_crit("wrong parameter: %d", what);
 		return -EINVAL;
@@ -9342,6 +9351,22 @@ static int tpacpi_battery_set(int what, int battery, int value)
 			return -ENODEV;
 		}
 		return 0;
+	case INHIBIT_CHARGE:
+		/* When setting inhibit charge, we set a default value of
+		 * always breaking on AC detach and the effective time is set to
+		 * be permanent.
+		 * The battery ID is in bits 4-5, 2 bits,
+		 * the effective time is in bits 8-23, 2 bytes.
+		 * A time of FFFF indicates forever.
+		 */
+		param = value;
+		param |= battery << 4;
+		param |= 0xFFFF << 8;
+		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
+			pr_err("failed to set inhibit charge on %d", battery);
+			return -ENODEV;
+		}
+		return 0;
 	default:
 		pr_crit("wrong parameter: %d", what);
 		return -EINVAL;
@@ -9389,6 +9414,8 @@ static int tpacpi_battery_probe(int battery)
 	 * 4) Check for support
 	 * 5) Get the current force discharge status
 	 * 6) Check for support
+	 * 7) Get the current inhibit charge status
+	 * 8) Check for support
 	 */
 	if (acpi_has_method(hkey_handle, GET_START)) {
 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
@@ -9435,6 +9462,16 @@ static int tpacpi_battery_probe(int battery)
 			battery_info.batteries[battery].charge_behaviours |=
 				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
 	}
+	if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
+		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
+			pr_err("Error probing battery inhibit charge; %d\n", battery);
+			return -ENODEV;
+		}
+		/* Support is marked in bit 5 */
+		if (ret & BIT(5))
+			battery_info.batteries[battery].charge_behaviours |=
+				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
+	}
 
 	battery_info.batteries[battery].charge_behaviours |=
 		BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
@@ -9593,10 +9630,22 @@ static ssize_t charge_behaviour_show(struct device *dev,
 	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
 		if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
 			return -ENODEV;
-		if (ret)
+		if (ret) {
 			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
+			goto out;
+		}
 	}
 
+	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
+		if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
+			return -ENODEV;
+		if (ret) {
+			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
+			goto out;
+		}
+	}
+
+out:
 	return power_supply_charge_behaviour_show(dev, available, active, buf);
 }
 
@@ -9633,11 +9682,22 @@ static ssize_t charge_behaviour_store(struct device *dev,
 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
 			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
+		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
+			ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
 		if (ret < 0)
 			return ret;
 		break;
 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
-		ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1);
+		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
+			ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
+		ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
+		if (ret < 0)
+			return ret;
+		break;
+	case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
+		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
+			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
+		ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
 		if (ret < 0)
 			return ret;
 		break;

From 6a5a14b18972ae03861e2ed15152f731de29baaa Mon Sep 17 00:00:00 2001
From: Sanket Goswami <Sanket.Goswami@amd.com>
Date: Tue, 30 Nov 2021 16:53:17 +0530
Subject: [PATCH 40/78] platform/x86: amd-pmc: Simplify error handling and
 store the pci_dev in amd_pmc_dev structure

Handle error-exits in the amd_pmc_probe() to avoid duplication and store
the root port information in amd_pmc_probe() so that the information
can be used across multiple routines.

Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Link: https://lore.kernel.org/r/20211130112318.92850-2-Sanket.Goswami@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/amd-pmc.c | 40 +++++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 15 deletions(-)

diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index 841c44cd64c2..a514a84b2517 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -121,6 +121,7 @@ struct amd_pmc_dev {
 	u16 minor;
 	u16 rev;
 	struct device *dev;
+	struct pci_dev *rdev;
 	struct mutex lock; /* generic mutex lock */
 #if IS_ENABLED(CONFIG_DEBUG_FS)
 	struct dentry *dbgfs_dir;
@@ -533,22 +534,23 @@ static int amd_pmc_probe(struct platform_device *pdev)
 
 	rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
 	if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) {
-		pci_dev_put(rdev);
-		return -ENODEV;
+		err = -ENODEV;
+		goto err_pci_dev_put;
 	}
 
 	dev->cpu_id = rdev->device;
+	dev->rdev = rdev;
 	err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_LO);
 	if (err) {
 		dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS);
-		pci_dev_put(rdev);
-		return pcibios_err_to_errno(err);
+		err = pcibios_err_to_errno(err);
+		goto err_pci_dev_put;
 	}
 
 	err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val);
 	if (err) {
-		pci_dev_put(rdev);
-		return pcibios_err_to_errno(err);
+		err = pcibios_err_to_errno(err);
+		goto err_pci_dev_put;
 	}
 
 	base_addr_lo = val & AMD_PMC_BASE_ADDR_HI_MASK;
@@ -556,24 +558,25 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_HI);
 	if (err) {
 		dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS);
-		pci_dev_put(rdev);
-		return pcibios_err_to_errno(err);
+		err = pcibios_err_to_errno(err);
+		goto err_pci_dev_put;
 	}
 
 	err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val);
 	if (err) {
-		pci_dev_put(rdev);
-		return pcibios_err_to_errno(err);
+		err = pcibios_err_to_errno(err);
+		goto err_pci_dev_put;
 	}
 
 	base_addr_hi = val & AMD_PMC_BASE_ADDR_LO_MASK;
-	pci_dev_put(rdev);
 	base_addr = ((u64)base_addr_hi << 32 | base_addr_lo);
 
 	dev->regbase = devm_ioremap(dev->dev, base_addr + AMD_PMC_BASE_ADDR_OFFSET,
 				    AMD_PMC_MAPPING_SIZE);
-	if (!dev->regbase)
-		return -ENOMEM;
+	if (!dev->regbase) {
+		err = -ENOMEM;
+		goto err_pci_dev_put;
+	}
 
 	mutex_init(&dev->lock);
 
@@ -582,8 +585,10 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	base_addr_hi = FCH_BASE_PHY_ADDR_HIGH;
 	fch_phys_addr = ((u64)base_addr_hi << 32 | base_addr_lo);
 	dev->fch_virt_addr = devm_ioremap(dev->dev, fch_phys_addr, FCH_SSC_MAPPING_SIZE);
-	if (!dev->fch_virt_addr)
-		return -ENOMEM;
+	if (!dev->fch_virt_addr) {
+		err = -ENOMEM;
+		goto err_pci_dev_put;
+	}
 
 	/* Use SMU to get the s0i3 debug stats */
 	err = amd_pmc_setup_smu_logging(dev);
@@ -594,6 +599,10 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, dev);
 	amd_pmc_dbgfs_register(dev);
 	return 0;
+
+err_pci_dev_put:
+	pci_dev_put(rdev);
+	return err;
 }
 
 static int amd_pmc_remove(struct platform_device *pdev)
@@ -601,6 +610,7 @@ static int amd_pmc_remove(struct platform_device *pdev)
 	struct amd_pmc_dev *dev = platform_get_drvdata(pdev);
 
 	amd_pmc_dbgfs_unregister(dev);
+	pci_dev_put(dev->rdev);
 	mutex_destroy(&dev->lock);
 	return 0;
 }

From 426c0ff27b833939ed434b4a468bdc010864922a Mon Sep 17 00:00:00 2001
From: Sanket Goswami <Sanket.Goswami@amd.com>
Date: Tue, 30 Nov 2021 16:53:18 +0530
Subject: [PATCH 41/78] platform/x86: amd-pmc: Add support for AMD Smart Trace
 Buffer

STB (Smart Trace Buffer), is a debug trace buffer that isolates the
failures by analyzing the last running feature of a system. This
non-intrusive way always runs in the background and stores the trace
into the SoC.

This patch enables the STB feature by passing module param
"enable_stb=1" while loading the driver and provides mechanism to
access the STB buffer using the read and write routines.

Co-developed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Link: https://lore.kernel.org/r/20211130112318.92850-3-Sanket.Goswami@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/amd-pmc.c | 120 +++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)

diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index a514a84b2517..c709ff993e8b 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -35,6 +35,12 @@
 #define AMD_PMC_SCRATCH_REG_CZN		0x94
 #define AMD_PMC_SCRATCH_REG_YC		0xD14
 
+/* STB Registers */
+#define AMD_PMC_STB_INDEX_ADDRESS	0xF8
+#define AMD_PMC_STB_INDEX_DATA		0xFC
+#define AMD_PMC_STB_PMI_0		0x03E30600
+#define AMD_PMC_STB_PREDEF		0xC6000001
+
 /* Base address of SMU for mapping physical address to virtual address */
 #define AMD_PMC_SMU_INDEX_ADDRESS	0xB8
 #define AMD_PMC_SMU_INDEX_DATA		0xBC
@@ -82,6 +88,7 @@
 #define SOC_SUBSYSTEM_IP_MAX	12
 #define DELAY_MIN_US		2000
 #define DELAY_MAX_US		3000
+#define FIFO_SIZE		4096
 enum amd_pmc_def {
 	MSG_TEST = 0x01,
 	MSG_OS_HINT_PCO,
@@ -128,8 +135,14 @@ struct amd_pmc_dev {
 #endif /* CONFIG_DEBUG_FS */
 };
 
+static bool enable_stb;
+module_param(enable_stb, bool, 0644);
+MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism");
+
 static struct amd_pmc_dev pmc;
 static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret);
+static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data);
+static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf);
 
 static inline u32 amd_pmc_reg_read(struct amd_pmc_dev *dev, int reg_offset)
 {
@@ -176,6 +189,50 @@ static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev)
 	return 0;
 }
 
+static int amd_pmc_stb_debugfs_open(struct inode *inode, struct file *filp)
+{
+	struct amd_pmc_dev *dev = filp->f_inode->i_private;
+	u32 size = FIFO_SIZE * sizeof(u32);
+	u32 *buf;
+	int rc;
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	rc = amd_pmc_read_stb(dev, buf);
+	if (rc) {
+		kfree(buf);
+		return rc;
+	}
+
+	filp->private_data = buf;
+	return rc;
+}
+
+static ssize_t amd_pmc_stb_debugfs_read(struct file *filp, char __user *buf, size_t size,
+					loff_t *pos)
+{
+	if (!filp->private_data)
+		return -EINVAL;
+
+	return simple_read_from_buffer(buf, size, pos, filp->private_data,
+				       FIFO_SIZE * sizeof(u32));
+}
+
+static int amd_pmc_stb_debugfs_release(struct inode *inode, struct file *filp)
+{
+	kfree(filp->private_data);
+	return 0;
+}
+
+const struct file_operations amd_pmc_stb_debugfs_fops = {
+	.owner = THIS_MODULE,
+	.open = amd_pmc_stb_debugfs_open,
+	.read = amd_pmc_stb_debugfs_read,
+	.release = amd_pmc_stb_debugfs_release,
+};
+
 static int amd_pmc_idlemask_read(struct amd_pmc_dev *pdev, struct device *dev,
 				 struct seq_file *s)
 {
@@ -289,6 +346,10 @@ static void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev)
 			    &s0ix_stats_fops);
 	debugfs_create_file("amd_pmc_idlemask", 0644, dev->dbgfs_dir, dev,
 			    &amd_pmc_idlemask_fops);
+	/* Enable STB only when the module_param is set */
+	if (enable_stb)
+		debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev,
+				    &amd_pmc_stb_debugfs_fops);
 }
 #else
 static inline void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev)
@@ -485,6 +546,13 @@ static int __maybe_unused amd_pmc_suspend(struct device *dev)
 	if (rc)
 		dev_err(pdev->dev, "suspend failed\n");
 
+	if (enable_stb)
+		rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_PREDEF);
+	if (rc)	{
+		dev_err(pdev->dev, "error writing to STB\n");
+		return rc;
+	}
+
 	return rc;
 }
 
@@ -505,6 +573,14 @@ static int __maybe_unused amd_pmc_resume(struct device *dev)
 	/* Dump the IdleMask to see the blockers */
 	amd_pmc_idlemask_read(pdev, dev, NULL);
 
+	/* Write data incremented by 1 to distinguish in stb_read */
+	if (enable_stb)
+		rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_PREDEF + 1);
+	if (rc)	{
+		dev_err(pdev->dev, "error writing to STB\n");
+		return rc;
+	}
+
 	return 0;
 }
 
@@ -521,6 +597,50 @@ static const struct pci_device_id pmc_pci_ids[] = {
 	{ }
 };
 
+static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data)
+{
+	int err;
+
+	err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_ADDRESS, AMD_PMC_STB_PMI_0);
+	if (err) {
+		dev_err(dev->dev, "failed to write addr in stb: 0x%X\n",
+			AMD_PMC_STB_INDEX_ADDRESS);
+		return pcibios_err_to_errno(err);
+	}
+
+	err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_DATA, data);
+	if (err) {
+		dev_err(dev->dev, "failed to write data in stb: 0x%X\n",
+			AMD_PMC_STB_INDEX_DATA);
+		return pcibios_err_to_errno(err);
+	}
+
+	return 0;
+}
+
+static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf)
+{
+	int i, err;
+
+	err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_ADDRESS, AMD_PMC_STB_PMI_0);
+	if (err) {
+		dev_err(dev->dev, "error writing addr to stb: 0x%X\n",
+			AMD_PMC_STB_INDEX_ADDRESS);
+		return pcibios_err_to_errno(err);
+	}
+
+	for (i = 0; i < FIFO_SIZE; i++) {
+		err = pci_read_config_dword(dev->rdev, AMD_PMC_STB_INDEX_DATA, buf++);
+		if (err) {
+			dev_err(dev->dev, "error reading data from stb: 0x%X\n",
+				AMD_PMC_STB_INDEX_DATA);
+			return pcibios_err_to_errno(err);
+		}
+	}
+
+	return 0;
+}
+
 static int amd_pmc_probe(struct platform_device *pdev)
 {
 	struct amd_pmc_dev *dev = &pmc;

From cfc643aa23c8855b92f9302e99a54dbf5857c1ab Mon Sep 17 00:00:00 2001
From: Miaoqian Lin <linmq006@gmail.com>
Date: Fri, 10 Dec 2021 07:07:53 +0000
Subject: [PATCH 42/78] platform/mellanox: mlxbf-pmc: Fix an IS_ERR() vs NULL
 bug in mlxbf_pmc_map_counters

The devm_ioremap() function returns NULL on error, it doesn't return
error pointers. Also according to doc of device_property_read_u64_array,
values in info array are properties of device or NULL.

Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20211210070753.10761-1-linmq006@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/mellanox/mlxbf-pmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c
index 04bc3b50aa7a..65b4a819f1bd 100644
--- a/drivers/platform/mellanox/mlxbf-pmc.c
+++ b/drivers/platform/mellanox/mlxbf-pmc.c
@@ -1374,8 +1374,8 @@ static int mlxbf_pmc_map_counters(struct device *dev)
 		pmc->block[i].counters = info[2];
 		pmc->block[i].type = info[3];
 
-		if (IS_ERR(pmc->block[i].mmio_base))
-			return PTR_ERR(pmc->block[i].mmio_base);
+		if (!pmc->block[i].mmio_base)
+			return -ENOMEM;
 
 		ret = mlxbf_pmc_create_groups(dev, i);
 		if (ret)

From d386f7ef9f410266bc1f364ad6a11cb28dae09a8 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Fri, 10 Dec 2021 08:35:29 -0600
Subject: [PATCH 43/78] platform/x86: amd-pmc: only use callbacks for suspend

This driver is intended to be used exclusively for suspend to idle
so callbacks to send OS_HINT during hibernate and S5 will set OS_HINT
at the wrong time leading to an undefined behavior.

Cc: stable@vger.kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20211210143529.10594-1-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/amd-pmc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index c709ff993e8b..f794343d6aaa 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -585,7 +585,8 @@ static int __maybe_unused amd_pmc_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops amd_pmc_pm_ops = {
-	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(amd_pmc_suspend, amd_pmc_resume)
+	.suspend_noirq = amd_pmc_suspend,
+	.resume_noirq = amd_pmc_resume,
 };
 
 static const struct pci_device_id pmc_pci_ids[] = {

From 855045873b54b9f8dd71a0468db9ff52aa27444f Mon Sep 17 00:00:00 2001
From: Wang Qing <wangqing@vivo.com>
Date: Tue, 14 Dec 2021 04:18:36 -0800
Subject: [PATCH 44/78] platform/x86: apple-gmux: use resource_size() with res

This should be (res->end - res->start + 1) here actually,
use resource_size() derectly.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Link: https://lore.kernel.org/r/1639484316-75873-1-git-send-email-wangqing@vivo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/apple-gmux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index 9aae45a45200..57553f9b4d1d 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -625,7 +625,7 @@ static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 	}
 
 	gmux_data->iostart = res->start;
-	gmux_data->iolen = res->end - res->start;
+	gmux_data->iolen = resource_size(res);
 
 	if (gmux_data->iolen < GMUX_MIN_IO_LEN) {
 		pr_err("gmux I/O region too small (%lu < %u)\n",

From 72e4d07d9499d979a3fc38c77f4120707c709ea5 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 17 Dec 2021 10:12:09 +0300
Subject: [PATCH 45/78] platform/x86: think-lmi: Prevent underflow in
 index_store()

There needs to be a check to prevent negative offsets for
setting->index.  I have reviewed this code and I think that the
"if (block->instance_count <= instance)" check in __query_block() will
prevent this from resulting in an out of bounds access.  But it's
still worth fixing.

Fixes: 640a5fa50a42 ("platform/x86: think-lmi: Opcode support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211217071209.GF26548@kili
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/think-lmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index 27ab8e4e5b83..0b73e16cccea 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -573,7 +573,7 @@ static ssize_t index_store(struct kobject *kobj,
 	if (err < 0)
 		return err;
 
-	if (val > TLMI_INDEX_MAX)
+	if (val < 0 || val > TLMI_INDEX_MAX)
 		return -EINVAL;
 
 	setting->index = val;

From 3ac7bf0d47be0383de078e153dae8aecc1853033 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 10 Dec 2021 18:30:07 +0200
Subject: [PATCH 46/78] platform/x86: asus-wmi: Join string literals back

For easy grepping on debug purposes join string literals back in
the messages.

No functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211210163009.19894-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/asus-wmi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 6fa4b0be8e76..30e0de9e0d81 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1154,12 +1154,10 @@ static void asus_rfkill_hotplug(struct asus_wmi *asus)
 		absent = (l == 0xffffffff);
 
 		if (blocked != absent) {
-			pr_warn("BIOS says wireless lan is %s, "
-				"but the pci device is %s\n",
+			pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
 				blocked ? "blocked" : "unblocked",
 				absent ? "absent" : "present");
-			pr_warn("skipped wireless hotplug as probably "
-				"inappropriate for this model\n");
+			pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
 			goto out_unlock;
 		}
 

From 522fbca4f769027356359bc99c55445645e5369d Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 10 Dec 2021 18:30:08 +0200
Subject: [PATCH 47/78] platform/x86: asus-wmi: Split MODULE_AUTHOR() on per
 author basis

There are as many as needed MODULE_AUTHOR() macro entries allowed
in the single driver. Split author list to a few macro entries.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211210163009.19894-2-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/asus-wmi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 30e0de9e0d81..c3e0394aa5f0 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -43,8 +43,8 @@
 
 #include "asus-wmi.h"
 
-MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
-	      "Yong Wang <yong.y.wang@intel.com>");
+MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
+MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
 MODULE_DESCRIPTION("Asus Generic WMI Driver");
 MODULE_LICENSE("GPL");
 

From c545a70dd2a1211c33de3a09102691145acc5b35 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 10 Dec 2021 18:30:09 +0200
Subject: [PATCH 48/78] platform/x86: asus-wmi: Reshuffle headers for better
 maintenance

Reshuffle headers in alphabetical order for better maintenance.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211210163009.19894-3-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/asus-wmi.c | 36 ++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index c3e0394aa5f0..a3b83b22a3b1 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -13,29 +13,29 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <linux/input/sparse-keymap.h>
-#include <linux/fb.h>
+#include <linux/acpi.h>
 #include <linux/backlight.h>
-#include <linux/leds.h>
-#include <linux/rfkill.h>
-#include <linux/pci.h>
-#include <linux/pci_hotplug.h>
-#include <linux/platform_profile.h>
-#include <linux/power_supply.h>
+#include <linux/debugfs.h>
+#include <linux/dmi.h>
+#include <linux/fb.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include <linux/platform_data/x86/asus-wmi.h>
 #include <linux/platform_device.h>
-#include <linux/acpi.h>
-#include <linux/dmi.h>
+#include <linux/platform_profile.h>
+#include <linux/power_supply.h>
+#include <linux/rfkill.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/types.h>
 #include <linux/units.h>
 
 #include <acpi/battery.h>

From ba8cfebd9d9fdc9f5aa960ab388a5e50b017aaa6 Mon Sep 17 00:00:00 2001
From: Tim Crawford <tcrawford@system76.com>
Date: Wed, 22 Dec 2021 11:51:54 -0700
Subject: [PATCH 49/78] platform/x86: system76_acpi: Guard System76 EC specific
 functionality

Certain functionality or its implementation in System76 EC firmware may
be different to the proprietary ODM EC firmware. Introduce a new bool,
`has_open_ec`, to guard our specific logic. Detect the use of this by
looking for a custom ACPI method name used in System76 firmware.

Signed-off-by: Tim Crawford <tcrawford@system76.com>
Link: https://lore.kernel.org/r/20211222185154.4560-1-tcrawford@system76.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/system76_acpi.c | 58 ++++++++++++++--------------
 1 file changed, 30 insertions(+), 28 deletions(-)

diff --git a/drivers/platform/x86/system76_acpi.c b/drivers/platform/x86/system76_acpi.c
index 8b292ee95a14..7299ad08c838 100644
--- a/drivers/platform/x86/system76_acpi.c
+++ b/drivers/platform/x86/system76_acpi.c
@@ -35,6 +35,7 @@ struct system76_data {
 	union acpi_object *nfan;
 	union acpi_object *ntmp;
 	struct input_dev *input;
+	bool has_open_ec;
 };
 
 static const struct acpi_device_id device_ids[] = {
@@ -279,20 +280,12 @@ static struct acpi_battery_hook system76_battery_hook = {
 
 static void system76_battery_init(void)
 {
-	acpi_handle handle;
-
-	handle = ec_get_handle();
-	if (handle && acpi_has_method(handle, "GBCT"))
-		battery_hook_register(&system76_battery_hook);
+	battery_hook_register(&system76_battery_hook);
 }
 
 static void system76_battery_exit(void)
 {
-	acpi_handle handle;
-
-	handle = ec_get_handle();
-	if (handle && acpi_has_method(handle, "GBCT"))
-		battery_hook_unregister(&system76_battery_hook);
+	battery_hook_unregister(&system76_battery_hook);
 }
 
 // Get the airplane mode LED brightness
@@ -673,6 +666,10 @@ static int system76_add(struct acpi_device *acpi_dev)
 	acpi_dev->driver_data = data;
 	data->acpi_dev = acpi_dev;
 
+	// Some models do not run open EC firmware. Check for an ACPI method
+	// that only exists on open EC to guard functionality specific to it.
+	data->has_open_ec = acpi_has_method(acpi_device_handle(data->acpi_dev), "NFAN");
+
 	err = system76_get(data, "INIT");
 	if (err)
 		return err;
@@ -718,27 +715,31 @@ static int system76_add(struct acpi_device *acpi_dev)
 	if (err)
 		goto error;
 
-	err = system76_get_object(data, "NFAN", &data->nfan);
-	if (err)
-		goto error;
+	if (data->has_open_ec) {
+		err = system76_get_object(data, "NFAN", &data->nfan);
+		if (err)
+			goto error;
 
-	err = system76_get_object(data, "NTMP", &data->ntmp);
-	if (err)
-		goto error;
+		err = system76_get_object(data, "NTMP", &data->ntmp);
+		if (err)
+			goto error;
 
-	data->therm = devm_hwmon_device_register_with_info(&acpi_dev->dev,
-		"system76_acpi", data, &thermal_chip_info, NULL);
-	err = PTR_ERR_OR_ZERO(data->therm);
-	if (err)
-		goto error;
+		data->therm = devm_hwmon_device_register_with_info(&acpi_dev->dev,
+			"system76_acpi", data, &thermal_chip_info, NULL);
+		err = PTR_ERR_OR_ZERO(data->therm);
+		if (err)
+			goto error;
 
-	system76_battery_init();
+		system76_battery_init();
+	}
 
 	return 0;
 
 error:
-	kfree(data->ntmp);
-	kfree(data->nfan);
+	if (data->has_open_ec) {
+		kfree(data->ntmp);
+		kfree(data->nfan);
+	}
 	return err;
 }
 
@@ -749,14 +750,15 @@ static int system76_remove(struct acpi_device *acpi_dev)
 
 	data = acpi_driver_data(acpi_dev);
 
-	system76_battery_exit();
+	if (data->has_open_ec) {
+		system76_battery_exit();
+		kfree(data->nfan);
+		kfree(data->ntmp);
+	}
 
 	devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led);
 	devm_led_classdev_unregister(&acpi_dev->dev, &data->kb_led);
 
-	kfree(data->nfan);
-	kfree(data->ntmp);
-
 	system76_get(data, "FINI");
 
 	return 0;

From c0518b21fba5351c8544a18c1bdf20b73088d5d9 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed, 22 Dec 2021 21:49:41 +0200
Subject: [PATCH 50/78] platform/x86/intel: Remove X86_PLATFORM_DRIVERS_INTEL

While introduction of this menu brings a nice view in the configuration tools,
it brought more issues than solves, i.e. it prevents to locate files in the
intel/ subfolder without touching non-related Kconfig dependencies elsewhere.
Drop X86_PLATFORM_DRIVERS_INTEL altogether.

Note, on x86 it's enabled by default and it's quite unlikely anybody wants to
disable all of the modules in this submenu.

Fixes: 8bd836feb6ca ("platform/x86: intel_skl_int3472: Move to intel/ subfolder")
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211222194941.76054-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/Makefile      |  2 +-
 drivers/platform/x86/intel/Kconfig | 15 ---------------
 2 files changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index dfb7ca88f012..18b11769073b 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -69,7 +69,7 @@ obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o
 obj-$(CONFIG_THINKPAD_LMI)	+= think-lmi.o
 
 # Intel
-obj-$(CONFIG_X86_PLATFORM_DRIVERS_INTEL)		+= intel/
+obj-y				+= intel/
 
 # MSI
 obj-$(CONFIG_MSI_LAPTOP)	+= msi-laptop.o
diff --git a/drivers/platform/x86/intel/Kconfig b/drivers/platform/x86/intel/Kconfig
index 38ce3e344589..40096b25994a 100644
--- a/drivers/platform/x86/intel/Kconfig
+++ b/drivers/platform/x86/intel/Kconfig
@@ -3,19 +3,6 @@
 # Intel x86 Platform Specific Drivers
 #
 
-menuconfig X86_PLATFORM_DRIVERS_INTEL
-	bool "Intel x86 Platform Specific Device Drivers"
-	default y
-	help
-	  Say Y here to get to see options for device drivers for
-	  various Intel x86 platforms, including vendor-specific
-	  drivers. This option alone does not add any kernel code.
-
-	  If you say N, all options in this submenu will be skipped
-	  and disabled.
-
-if X86_PLATFORM_DRIVERS_INTEL
-
 source "drivers/platform/x86/intel/atomisp2/Kconfig"
 source "drivers/platform/x86/intel/int1092/Kconfig"
 source "drivers/platform/x86/intel/int33fe/Kconfig"
@@ -183,5 +170,3 @@ config INTEL_UNCORE_FREQ_CONTROL
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called intel-uncore-frequency.
-
-endif # X86_PLATFORM_DRIVERS_INTEL

From dd123e62bdedcd3a486e48e883ec63138ec2c14c Mon Sep 17 00:00:00 2001
From: Henning Schild <henning.schild@siemens.com>
Date: Mon, 13 Dec 2021 13:04:59 +0100
Subject: [PATCH 51/78] platform/x86: simatic-ipc: add main driver for Siemens
 devices

This mainly implements detection of these devices and will allow
secondary drivers to work on such machines.

The identification is DMI-based with a vendor specific way to tell them
apart in a reliable way.

Drivers for LEDs and Watchdogs will follow to make use of that platform
detection.

There is also some code to allow secondary drivers to find GPIO memory,
that needs to be in place because the pinctrl drivers do not come up.

Signed-off-by: Henning Schild <henning.schild@siemens.com>
Link: https://lore.kernel.org/r/20211213120502.20661-2-henning.schild@siemens.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/Kconfig                  |  12 ++
 drivers/platform/x86/Makefile                 |   3 +
 drivers/platform/x86/simatic-ipc.c            | 176 ++++++++++++++++++
 .../platform_data/x86/simatic-ipc-base.h      |  29 +++
 include/linux/platform_data/x86/simatic-ipc.h |  72 +++++++
 5 files changed, 292 insertions(+)
 create mode 100644 drivers/platform/x86/simatic-ipc.c
 create mode 100644 include/linux/platform_data/x86/simatic-ipc-base.h
 create mode 100644 include/linux/platform_data/x86/simatic-ipc.h

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 961f33bea1f1..afa0f9b0141d 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1088,6 +1088,18 @@ config INTEL_SCU_IPC_UTIL
 	  low level access for debug work and updating the firmware. Say
 	  N unless you will be doing this on an Intel MID platform.
 
+config SIEMENS_SIMATIC_IPC
+	tristate "Siemens Simatic IPC Class driver"
+	depends on PCI
+	help
+	  This Simatic IPC class driver is the central of several drivers. It
+	  is mainly used for system identification, after which drivers in other
+	  classes will take care of driving specifics of those machines.
+	  i.e. LEDs and watchdog.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called simatic-ipc.
+
 endif # X86_PLATFORM_DEVICES
 
 config PMC_ATOM
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 18b11769073b..d477aad34fab 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -124,3 +124,6 @@ obj-$(CONFIG_INTEL_SCU_PLATFORM)	+= intel_scu_pltdrv.o
 obj-$(CONFIG_INTEL_SCU_WDT)		+= intel_scu_wdt.o
 obj-$(CONFIG_INTEL_SCU_IPC_UTIL)	+= intel_scu_ipcutil.o
 obj-$(CONFIG_PMC_ATOM)			+= pmc_atom.o
+
+# Siemens Simatic Industrial PCs
+obj-$(CONFIG_SIEMENS_SIMATIC_IPC)	+= simatic-ipc.o
diff --git a/drivers/platform/x86/simatic-ipc.c b/drivers/platform/x86/simatic-ipc.c
new file mode 100644
index 000000000000..b599cda5ba3c
--- /dev/null
+++ b/drivers/platform/x86/simatic-ipc.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC platform driver
+ *
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ *  Henning Schild <henning.schild@siemens.com>
+ *  Jan Kiszka <jan.kiszka@siemens.com>
+ *  Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dmi.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_data/x86/simatic-ipc.h>
+#include <linux/platform_device.h>
+
+static struct platform_device *ipc_led_platform_device;
+static struct platform_device *ipc_wdt_platform_device;
+
+static const struct dmi_system_id simatic_ipc_whitelist[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
+		},
+	},
+	{}
+};
+
+static struct simatic_ipc_platform platform_data;
+
+static struct {
+	u32 station_id;
+	u8 led_mode;
+	u8 wdt_mode;
+} device_modes[] = {
+	{SIMATIC_IPC_IPC127E, SIMATIC_IPC_DEVICE_127E, SIMATIC_IPC_DEVICE_NONE},
+	{SIMATIC_IPC_IPC227D, SIMATIC_IPC_DEVICE_227D, SIMATIC_IPC_DEVICE_NONE},
+	{SIMATIC_IPC_IPC227E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_227E},
+	{SIMATIC_IPC_IPC277E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227E},
+	{SIMATIC_IPC_IPC427D, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE},
+	{SIMATIC_IPC_IPC427E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_427E},
+	{SIMATIC_IPC_IPC477E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_427E},
+};
+
+static int register_platform_devices(u32 station_id)
+{
+	u8 ledmode = SIMATIC_IPC_DEVICE_NONE;
+	u8 wdtmode = SIMATIC_IPC_DEVICE_NONE;
+	int i;
+
+	platform_data.devmode = SIMATIC_IPC_DEVICE_NONE;
+
+	for (i = 0; i < ARRAY_SIZE(device_modes); i++) {
+		if (device_modes[i].station_id == station_id) {
+			ledmode = device_modes[i].led_mode;
+			wdtmode = device_modes[i].wdt_mode;
+			break;
+		}
+	}
+
+	if (ledmode != SIMATIC_IPC_DEVICE_NONE) {
+		platform_data.devmode = ledmode;
+		ipc_led_platform_device =
+			platform_device_register_data(NULL,
+				KBUILD_MODNAME "_leds", PLATFORM_DEVID_NONE,
+				&platform_data,
+				sizeof(struct simatic_ipc_platform));
+		if (IS_ERR(ipc_led_platform_device))
+			return PTR_ERR(ipc_led_platform_device);
+
+		pr_debug("device=%s created\n",
+			 ipc_led_platform_device->name);
+	}
+
+	if (wdtmode != SIMATIC_IPC_DEVICE_NONE) {
+		platform_data.devmode = wdtmode;
+		ipc_wdt_platform_device =
+			platform_device_register_data(NULL,
+				KBUILD_MODNAME "_wdt", PLATFORM_DEVID_NONE,
+				&platform_data,
+				sizeof(struct simatic_ipc_platform));
+		if (IS_ERR(ipc_wdt_platform_device))
+			return PTR_ERR(ipc_wdt_platform_device);
+
+		pr_debug("device=%s created\n",
+			 ipc_wdt_platform_device->name);
+	}
+
+	if (ledmode == SIMATIC_IPC_DEVICE_NONE &&
+	    wdtmode == SIMATIC_IPC_DEVICE_NONE) {
+		pr_warn("unsupported IPC detected, station id=%08x\n",
+			station_id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* FIXME: this should eventually be done with generic P2SB discovery code
+ * the individual drivers for watchdogs and LEDs access memory that implements
+ * GPIO, but pinctrl will not come up because of missing ACPI entries
+ *
+ * While there is no conflict a cleaner solution would be to somehow bring up
+ * pinctrl even with these ACPI entries missing, and base the drivers on pinctrl.
+ * After which the following function could be dropped, together with the code
+ * poking the memory.
+ */
+/*
+ * Get membase address from PCI, used in leds and wdt module. Here we read
+ * the bar0. The final address calculation is done in the appropriate modules
+ */
+u32 simatic_ipc_get_membase0(unsigned int p2sb)
+{
+	struct pci_bus *bus;
+	u32 bar0 = 0;
+	/*
+	 * The GPIO memory is in bar0 of the hidden P2SB device.
+	 * Unhide the device to have a quick look at it, before we hide it
+	 * again.
+	 * Also grab the pci rescan lock so that device does not get discovered
+	 * and remapped while it is visible.
+	 * This code is inspired by drivers/mfd/lpc_ich.c
+	 */
+	bus = pci_find_bus(0, 0);
+	pci_lock_rescan_remove();
+	pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x0);
+	pci_bus_read_config_dword(bus, p2sb, PCI_BASE_ADDRESS_0, &bar0);
+
+	bar0 &= ~0xf;
+	pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x1);
+	pci_unlock_rescan_remove();
+
+	return bar0;
+}
+EXPORT_SYMBOL(simatic_ipc_get_membase0);
+
+static int __init simatic_ipc_init_module(void)
+{
+	const struct dmi_system_id *match;
+	u32 station_id;
+	int err;
+
+	match = dmi_first_match(simatic_ipc_whitelist);
+	if (!match)
+		return 0;
+
+	err = dmi_walk(simatic_ipc_find_dmi_entry_helper, &station_id);
+
+	if (err || station_id == SIMATIC_IPC_INVALID_STATION_ID) {
+		pr_warn("DMI entry %d not found\n", SIMATIC_IPC_DMI_ENTRY_OEM);
+		return 0;
+	}
+
+	return register_platform_devices(station_id);
+}
+
+static void __exit simatic_ipc_exit_module(void)
+{
+	platform_device_unregister(ipc_led_platform_device);
+	ipc_led_platform_device = NULL;
+
+	platform_device_unregister(ipc_wdt_platform_device);
+	ipc_wdt_platform_device = NULL;
+}
+
+module_init(simatic_ipc_init_module);
+module_exit(simatic_ipc_exit_module);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Gerd Haeussler <gerd.haeussler.ext@siemens.com>");
+MODULE_ALIAS("dmi:*:svnSIEMENSAG:*");
diff --git a/include/linux/platform_data/x86/simatic-ipc-base.h b/include/linux/platform_data/x86/simatic-ipc-base.h
new file mode 100644
index 000000000000..62d2bc774067
--- /dev/null
+++ b/include/linux/platform_data/x86/simatic-ipc-base.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Siemens SIMATIC IPC drivers
+ *
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ *  Henning Schild <henning.schild@siemens.com>
+ *  Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#ifndef __PLATFORM_DATA_X86_SIMATIC_IPC_BASE_H
+#define __PLATFORM_DATA_X86_SIMATIC_IPC_BASE_H
+
+#include <linux/types.h>
+
+#define SIMATIC_IPC_DEVICE_NONE 0
+#define SIMATIC_IPC_DEVICE_227D 1
+#define SIMATIC_IPC_DEVICE_427E 2
+#define SIMATIC_IPC_DEVICE_127E 3
+#define SIMATIC_IPC_DEVICE_227E 4
+
+struct simatic_ipc_platform {
+	u8	devmode;
+};
+
+u32 simatic_ipc_get_membase0(unsigned int p2sb);
+
+#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_BASE_H */
diff --git a/include/linux/platform_data/x86/simatic-ipc.h b/include/linux/platform_data/x86/simatic-ipc.h
new file mode 100644
index 000000000000..f3b76b39776b
--- /dev/null
+++ b/include/linux/platform_data/x86/simatic-ipc.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Siemens SIMATIC IPC drivers
+ *
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ *  Henning Schild <henning.schild@siemens.com>
+ *  Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#ifndef __PLATFORM_DATA_X86_SIMATIC_IPC_H
+#define __PLATFORM_DATA_X86_SIMATIC_IPC_H
+
+#include <linux/dmi.h>
+#include <linux/platform_data/x86/simatic-ipc-base.h>
+
+#define SIMATIC_IPC_DMI_ENTRY_OEM	129
+/* binary type */
+#define SIMATIC_IPC_DMI_TYPE		0xff
+#define SIMATIC_IPC_DMI_GROUP		0x05
+#define SIMATIC_IPC_DMI_ENTRY		0x02
+#define SIMATIC_IPC_DMI_TID		0x02
+
+enum simatic_ipc_station_ids {
+	SIMATIC_IPC_INVALID_STATION_ID = 0,
+	SIMATIC_IPC_IPC227D = 0x00000501,
+	SIMATIC_IPC_IPC427D = 0x00000701,
+	SIMATIC_IPC_IPC227E = 0x00000901,
+	SIMATIC_IPC_IPC277E = 0x00000902,
+	SIMATIC_IPC_IPC427E = 0x00000A01,
+	SIMATIC_IPC_IPC477E = 0x00000A02,
+	SIMATIC_IPC_IPC127E = 0x00000D01,
+};
+
+static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len)
+{
+	struct {
+		u8	type;		/* type (0xff = binary) */
+		u8	len;		/* len of data entry */
+		u8	group;
+		u8	entry;
+		u8	tid;
+		__le32	station_id;	/* station id (LE) */
+	} __packed * data_entry = (void *)data + sizeof(struct dmi_header);
+
+	while ((u8 *)data_entry < data + max_len) {
+		if (data_entry->type == SIMATIC_IPC_DMI_TYPE &&
+		    data_entry->len == sizeof(*data_entry) &&
+		    data_entry->group == SIMATIC_IPC_DMI_GROUP &&
+		    data_entry->entry == SIMATIC_IPC_DMI_ENTRY &&
+		    data_entry->tid == SIMATIC_IPC_DMI_TID) {
+			return le32_to_cpu(data_entry->station_id);
+		}
+		data_entry = (void *)((u8 *)(data_entry) + data_entry->len);
+	}
+
+	return SIMATIC_IPC_INVALID_STATION_ID;
+}
+
+static inline void
+simatic_ipc_find_dmi_entry_helper(const struct dmi_header *dh, void *_data)
+{
+	u32 *id = _data;
+
+	if (dh->type != SIMATIC_IPC_DMI_ENTRY_OEM)
+		return;
+
+	*id = simatic_ipc_get_station_id((u8 *)dh, dh->length);
+}
+
+#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */

From 8c78e0614edc628b13313afd28856720b85d86a3 Mon Sep 17 00:00:00 2001
From: Henning Schild <henning.schild@siemens.com>
Date: Mon, 13 Dec 2021 13:05:00 +0100
Subject: [PATCH 52/78] leds: simatic-ipc-leds: add new driver for Siemens
 Industial PCs

This driver adds initial support for several devices from Siemens. It is
based on a platform driver introduced in an earlier commit.

One of the supported machines has GPIO connected LEDs, here we poke GPIO
memory directly because pinctrl does not come up.

Signed-off-by: Henning Schild <henning.schild@siemens.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Link: https://lore.kernel.org/r/20211213120502.20661-3-henning.schild@siemens.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/leds/Kconfig                   |   3 +
 drivers/leds/Makefile                  |   3 +
 drivers/leds/simple/Kconfig            |  11 ++
 drivers/leds/simple/Makefile           |   2 +
 drivers/leds/simple/simatic-ipc-leds.c | 202 +++++++++++++++++++++++++
 5 files changed, 221 insertions(+)
 create mode 100644 drivers/leds/simple/Kconfig
 create mode 100644 drivers/leds/simple/Makefile
 create mode 100644 drivers/leds/simple/simatic-ipc-leds.c

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index ed800f5da7d8..ac6688d7a3f4 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -879,4 +879,7 @@ source "drivers/leds/flash/Kconfig"
 comment "LED Triggers"
 source "drivers/leds/trigger/Kconfig"
 
+comment "Simple LED drivers"
+source "drivers/leds/simple/Kconfig"
+
 endif # NEW_LEDS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index c636ec069612..1a719caf14c0 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -105,3 +105,6 @@ obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
 
 # LED Blink
 obj-y					+= blink/
+
+# Simple LED drivers
+obj-y					+= simple/
diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig
new file mode 100644
index 000000000000..9f6a68336659
--- /dev/null
+++ b/drivers/leds/simple/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config LEDS_SIEMENS_SIMATIC_IPC
+	tristate "LED driver for Siemens Simatic IPCs"
+	depends on LEDS_CLASS
+	depends on SIEMENS_SIMATIC_IPC
+	help
+	  This option enables support for the LEDs of several Industrial PCs
+	  from Siemens.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called simatic-ipc-leds.
diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile
new file mode 100644
index 000000000000..8481f1e9e360
--- /dev/null
+++ b/drivers/leds/simple/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC)	+= simatic-ipc-leds.o
diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c
new file mode 100644
index 000000000000..ff2c96e73241
--- /dev/null
+++ b/drivers/leds/simple/simatic-ipc-leds.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC driver for LEDs
+ *
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ *  Henning Schild <henning.schild@siemens.com>
+ *  Jan Kiszka <jan.kiszka@siemens.com>
+ *  Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_data/x86/simatic-ipc-base.h>
+#include <linux/platform_device.h>
+#include <linux/sizes.h>
+#include <linux/spinlock.h>
+
+#define SIMATIC_IPC_LED_PORT_BASE	0x404E
+
+struct simatic_ipc_led {
+	unsigned int value; /* mask for io and offset for mem */
+	char *name;
+	struct led_classdev cdev;
+};
+
+static struct simatic_ipc_led simatic_ipc_leds_io[] = {
+	{1 << 15, "green:" LED_FUNCTION_STATUS "-1" },
+	{1 << 7,  "yellow:" LED_FUNCTION_STATUS "-1" },
+	{1 << 14, "red:" LED_FUNCTION_STATUS "-2" },
+	{1 << 6,  "yellow:" LED_FUNCTION_STATUS "-2" },
+	{1 << 13, "red:" LED_FUNCTION_STATUS "-3" },
+	{1 << 5,  "yellow:" LED_FUNCTION_STATUS "-3" },
+	{ }
+};
+
+/* the actual start will be discovered with PCI, 0 is a placeholder */
+struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME);
+
+static void *simatic_ipc_led_memory;
+
+static struct simatic_ipc_led simatic_ipc_leds_mem[] = {
+	{0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"},
+	{0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"},
+	{0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"},
+	{0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"},
+	{0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"},
+	{0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"},
+	{ }
+};
+
+static struct resource simatic_ipc_led_io_res =
+	DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME);
+
+static DEFINE_SPINLOCK(reg_lock);
+
+static inline struct simatic_ipc_led *cdev_to_led(struct led_classdev *led_cd)
+{
+	return container_of(led_cd, struct simatic_ipc_led, cdev);
+}
+
+static void simatic_ipc_led_set_io(struct led_classdev *led_cd,
+				   enum led_brightness brightness)
+{
+	struct simatic_ipc_led *led = cdev_to_led(led_cd);
+	unsigned long flags;
+	unsigned int val;
+
+	spin_lock_irqsave(&reg_lock, flags);
+
+	val = inw(SIMATIC_IPC_LED_PORT_BASE);
+	if (brightness == LED_OFF)
+		outw(val | led->value, SIMATIC_IPC_LED_PORT_BASE);
+	else
+		outw(val & ~led->value, SIMATIC_IPC_LED_PORT_BASE);
+
+	spin_unlock_irqrestore(&reg_lock, flags);
+}
+
+static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd)
+{
+	struct simatic_ipc_led *led = cdev_to_led(led_cd);
+
+	return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness;
+}
+
+static void simatic_ipc_led_set_mem(struct led_classdev *led_cd,
+				    enum led_brightness brightness)
+{
+	struct simatic_ipc_led *led = cdev_to_led(led_cd);
+
+	u32 *p;
+
+	p = simatic_ipc_led_memory + led->value;
+	*p = (*p & ~1) | (brightness == LED_OFF);
+}
+
+static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd)
+{
+	struct simatic_ipc_led *led = cdev_to_led(led_cd);
+
+	u32 *p;
+
+	p = simatic_ipc_led_memory + led->value;
+	return (*p & 1) ? LED_OFF : led_cd->max_brightness;
+}
+
+static int simatic_ipc_leds_probe(struct platform_device *pdev)
+{
+	const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
+	struct device *dev = &pdev->dev;
+	struct simatic_ipc_led *ipcled;
+	struct led_classdev *cdev;
+	struct resource *res;
+	int err, type;
+	u32 *p;
+
+	switch (plat->devmode) {
+	case SIMATIC_IPC_DEVICE_227D:
+	case SIMATIC_IPC_DEVICE_427E:
+		res = &simatic_ipc_led_io_res;
+		ipcled = simatic_ipc_leds_io;
+		/* on 227D the two bytes work the other way araound */
+		if (plat->devmode == SIMATIC_IPC_DEVICE_227D) {
+			while (ipcled->value) {
+				ipcled->value = swab16(ipcled->value);
+				ipcled++;
+			}
+			ipcled = simatic_ipc_leds_io;
+		}
+		type = IORESOURCE_IO;
+		if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) {
+			dev_err(dev, "Unable to register IO resource at %pR\n", res);
+			return -EBUSY;
+		}
+		break;
+	case SIMATIC_IPC_DEVICE_127E:
+		res = &simatic_ipc_led_mem_res;
+		ipcled = simatic_ipc_leds_mem;
+		type = IORESOURCE_MEM;
+
+		/* get GPIO base from PCI */
+		res->start = simatic_ipc_get_membase0(PCI_DEVFN(13, 0));
+		if (res->start == 0)
+			return -ENODEV;
+
+		/* do the final address calculation */
+		res->start = res->start + (0xC5 << 16);
+		res->end += res->start;
+
+		simatic_ipc_led_memory = devm_ioremap_resource(dev, res);
+		if (IS_ERR(simatic_ipc_led_memory))
+			return PTR_ERR(simatic_ipc_led_memory);
+
+		/* initialize power/watchdog LED */
+		p = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */
+		*p = (*p & ~1);
+		p = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */
+		*p = (*p | 1);
+
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	while (ipcled->value) {
+		cdev = &ipcled->cdev;
+		if (type == IORESOURCE_MEM) {
+			cdev->brightness_set = simatic_ipc_led_set_mem;
+			cdev->brightness_get = simatic_ipc_led_get_mem;
+		} else {
+			cdev->brightness_set = simatic_ipc_led_set_io;
+			cdev->brightness_get = simatic_ipc_led_get_io;
+		}
+		cdev->max_brightness = LED_ON;
+		cdev->name = ipcled->name;
+
+		err = devm_led_classdev_register(dev, cdev);
+		if (err < 0)
+			return err;
+		ipcled++;
+	}
+
+	return 0;
+}
+
+static struct platform_driver simatic_ipc_led_driver = {
+	.probe = simatic_ipc_leds_probe,
+	.driver = {
+		.name = KBUILD_MODNAME,
+	}
+};
+
+module_platform_driver(simatic_ipc_led_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");

From 2ebd32ce2aecd5ee57d9bdcac80e0df26c351061 Mon Sep 17 00:00:00 2001
From: Henning Schild <henning.schild@siemens.com>
Date: Mon, 13 Dec 2021 13:05:01 +0100
Subject: [PATCH 53/78] watchdog: simatic-ipc-wdt: add new driver for Siemens
 Industrial PCs

This driver adds initial support for several devices from Siemens. It is
based on a platform driver introduced in an earlier commit.

One of the supported machines does access a GPIO pin to enable the
watchdog. Here we poke GPIO memory because pinctrl does not come up.

Signed-off-by: Henning Schild <henning.schild@siemens.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20211213120502.20661-4-henning.schild@siemens.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/watchdog/Kconfig           |  11 ++
 drivers/watchdog/Makefile          |   1 +
 drivers/watchdog/simatic-ipc-wdt.c | 228 +++++++++++++++++++++++++++++
 3 files changed, 240 insertions(+)
 create mode 100644 drivers/watchdog/simatic-ipc-wdt.c

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 9d222ba17ec6..1dc86eb1361a 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1589,6 +1589,17 @@ config NIC7018_WDT
 	  To compile this driver as a module, choose M here: the module will be
 	  called nic7018_wdt.
 
+config SIEMENS_SIMATIC_IPC_WDT
+	tristate "Siemens Simatic IPC Watchdog"
+	depends on SIEMENS_SIMATIC_IPC
+	select WATCHDOG_CORE
+	help
+	  This driver adds support for several watchdogs found in Industrial
+	  PCs from Siemens.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called simatic-ipc-wdt.
+
 # M68K Architecture
 
 config M54xx_WATCHDOG
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 2ee97064145b..31b931846e32 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -143,6 +143,7 @@ obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
 obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
 obj-$(CONFIG_MLX_WDT) += mlx_wdt.o
 obj-$(CONFIG_KEEMBAY_WATCHDOG) += keembay_wdt.o
+obj-$(CONFIG_SIEMENS_SIMATIC_IPC_WDT) += simatic-ipc-wdt.o
 
 # M68K Architecture
 obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
diff --git a/drivers/watchdog/simatic-ipc-wdt.c b/drivers/watchdog/simatic-ipc-wdt.c
new file mode 100644
index 000000000000..8bac793c63fb
--- /dev/null
+++ b/drivers/watchdog/simatic-ipc-wdt.c
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC driver for Watchdogs
+ *
+ * Copyright (c) Siemens AG, 2020-2021
+ *
+ * Authors:
+ *  Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_data/x86/simatic-ipc-base.h>
+#include <linux/platform_device.h>
+#include <linux/sizes.h>
+#include <linux/util_macros.h>
+#include <linux/watchdog.h>
+
+#define WD_ENABLE_IOADR			0x62
+#define WD_TRIGGER_IOADR		0x66
+#define GPIO_COMMUNITY0_PORT_ID		0xaf
+#define PAD_CFG_DW0_GPP_A_23		0x4b8
+#define SAFE_EN_N_427E			0x01
+#define SAFE_EN_N_227E			0x04
+#define WD_ENABLED			0x01
+#define WD_TRIGGERED			0x80
+#define WD_MACROMODE			0x02
+
+#define TIMEOUT_MIN	2
+#define TIMEOUT_DEF	64
+#define TIMEOUT_MAX	64
+
+#define GP_STATUS_REG_227E	0x404D	/* IO PORT for SAFE_EN_N on 227E */
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0000);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+		 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static struct resource gp_status_reg_227e_res =
+	DEFINE_RES_IO_NAMED(GP_STATUS_REG_227E, SZ_1, KBUILD_MODNAME);
+
+static struct resource io_resource_enable =
+	DEFINE_RES_IO_NAMED(WD_ENABLE_IOADR, SZ_1,
+			    KBUILD_MODNAME " WD_ENABLE_IOADR");
+
+static struct resource io_resource_trigger =
+	DEFINE_RES_IO_NAMED(WD_TRIGGER_IOADR, SZ_1,
+			    KBUILD_MODNAME " WD_TRIGGER_IOADR");
+
+/* the actual start will be discovered with pci, 0 is a placeholder */
+static struct resource mem_resource =
+	DEFINE_RES_MEM_NAMED(0, SZ_4, "WD_RESET_BASE_ADR");
+
+static u32 wd_timeout_table[] = {2, 4, 6, 8, 16, 32, 48, 64 };
+static void __iomem *wd_reset_base_addr;
+
+static int wd_start(struct watchdog_device *wdd)
+{
+	outb(inb(WD_ENABLE_IOADR) | WD_ENABLED, WD_ENABLE_IOADR);
+	return 0;
+}
+
+static int wd_stop(struct watchdog_device *wdd)
+{
+	outb(inb(WD_ENABLE_IOADR) & ~WD_ENABLED, WD_ENABLE_IOADR);
+	return 0;
+}
+
+static int wd_ping(struct watchdog_device *wdd)
+{
+	inb(WD_TRIGGER_IOADR);
+	return 0;
+}
+
+static int wd_set_timeout(struct watchdog_device *wdd, unsigned int t)
+{
+	int timeout_idx = find_closest(t, wd_timeout_table,
+				       ARRAY_SIZE(wd_timeout_table));
+
+	outb((inb(WD_ENABLE_IOADR) & 0xc7) | timeout_idx << 3, WD_ENABLE_IOADR);
+	wdd->timeout = wd_timeout_table[timeout_idx];
+	return 0;
+}
+
+static const struct watchdog_info wdt_ident = {
+	.options	= WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING |
+			  WDIOF_SETTIMEOUT,
+	.identity	= KBUILD_MODNAME,
+};
+
+static const struct watchdog_ops wdt_ops = {
+	.owner		= THIS_MODULE,
+	.start		= wd_start,
+	.stop		= wd_stop,
+	.ping		= wd_ping,
+	.set_timeout	= wd_set_timeout,
+};
+
+static void wd_secondary_enable(u32 wdtmode)
+{
+	u16 resetbit;
+
+	/* set safe_en_n so we are not just WDIOF_ALARMONLY */
+	if (wdtmode == SIMATIC_IPC_DEVICE_227E) {
+		/* enable SAFE_EN_N on GP_STATUS_REG_227E */
+		resetbit = inb(GP_STATUS_REG_227E);
+		outb(resetbit & ~SAFE_EN_N_227E, GP_STATUS_REG_227E);
+	} else {
+		/* enable SAFE_EN_N on PCH D1600 */
+		resetbit = ioread16(wd_reset_base_addr);
+		iowrite16(resetbit & ~SAFE_EN_N_427E, wd_reset_base_addr);
+	}
+}
+
+static int wd_setup(u32 wdtmode)
+{
+	unsigned int bootstatus = 0;
+	int timeout_idx;
+
+	timeout_idx = find_closest(TIMEOUT_DEF, wd_timeout_table,
+				   ARRAY_SIZE(wd_timeout_table));
+
+	if (inb(WD_ENABLE_IOADR) & WD_TRIGGERED)
+		bootstatus |= WDIOF_CARDRESET;
+
+	/* reset alarm bit, set macro mode, and set timeout */
+	outb(WD_TRIGGERED | WD_MACROMODE | timeout_idx << 3, WD_ENABLE_IOADR);
+
+	wd_secondary_enable(wdtmode);
+
+	return bootstatus;
+}
+
+static struct watchdog_device wdd_data = {
+	.info = &wdt_ident,
+	.ops = &wdt_ops,
+	.min_timeout = TIMEOUT_MIN,
+	.max_timeout = TIMEOUT_MAX
+};
+
+static int simatic_ipc_wdt_probe(struct platform_device *pdev)
+{
+	struct simatic_ipc_platform *plat = pdev->dev.platform_data;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+
+	switch (plat->devmode) {
+	case SIMATIC_IPC_DEVICE_227E:
+		if (!devm_request_region(dev, gp_status_reg_227e_res.start,
+					 resource_size(&gp_status_reg_227e_res),
+					 KBUILD_MODNAME)) {
+			dev_err(dev,
+				"Unable to register IO resource at %pR\n",
+				&gp_status_reg_227e_res);
+			return -EBUSY;
+		}
+		fallthrough;
+	case SIMATIC_IPC_DEVICE_427E:
+		wdd_data.parent = dev;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (!devm_request_region(dev, io_resource_enable.start,
+				 resource_size(&io_resource_enable),
+				 io_resource_enable.name)) {
+		dev_err(dev,
+			"Unable to register IO resource at %#x\n",
+			WD_ENABLE_IOADR);
+		return -EBUSY;
+	}
+
+	if (!devm_request_region(dev, io_resource_trigger.start,
+				 resource_size(&io_resource_trigger),
+				 io_resource_trigger.name)) {
+		dev_err(dev,
+			"Unable to register IO resource at %#x\n",
+			WD_TRIGGER_IOADR);
+		return -EBUSY;
+	}
+
+	if (plat->devmode == SIMATIC_IPC_DEVICE_427E) {
+		res = &mem_resource;
+
+		/* get GPIO base from PCI */
+		res->start = simatic_ipc_get_membase0(PCI_DEVFN(0x1f, 1));
+		if (res->start == 0)
+			return -ENODEV;
+
+		/* do the final address calculation */
+		res->start = res->start + (GPIO_COMMUNITY0_PORT_ID << 16) +
+			     PAD_CFG_DW0_GPP_A_23;
+		res->end += res->start;
+
+		wd_reset_base_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(wd_reset_base_addr))
+			return PTR_ERR(wd_reset_base_addr);
+	}
+
+	wdd_data.bootstatus = wd_setup(plat->devmode);
+	if (wdd_data.bootstatus)
+		dev_warn(dev, "last reboot caused by watchdog reset\n");
+
+	watchdog_set_nowayout(&wdd_data, nowayout);
+	watchdog_stop_on_reboot(&wdd_data);
+	return devm_watchdog_register_device(dev, &wdd_data);
+}
+
+static struct platform_driver simatic_ipc_wdt_driver = {
+	.probe = simatic_ipc_wdt_probe,
+	.driver = {
+		.name = KBUILD_MODNAME,
+	},
+};
+
+module_platform_driver(simatic_ipc_wdt_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_AUTHOR("Gerd Haeussler <gerd.haeussler.ext@siemens.com>");

From 4ba0b8187d98cb4c5e33c0e98895ac5dcb86af83 Mon Sep 17 00:00:00 2001
From: Henning Schild <henning.schild@siemens.com>
Date: Mon, 13 Dec 2021 13:05:02 +0100
Subject: [PATCH 54/78] platform/x86: pmc_atom: improve critclk_systems
 matching for Siemens PCs

Siemens industrial PCs unfortunately can not always be properly
identified the way we used to. An earlier commit introduced code that
allows proper identification without looking at DMI strings that could
differ based on product branding.
Switch over to that proper way and revert commits that used to collect
the machines based on unstable strings.

Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Fixes: e8796c6c69d1 ("platform/x86: pmc_atom: Add Siemens CONNECT ...")
Fixes: f110d252ae79 ("platform/x86: pmc_atom: Add Siemens SIMATIC ...")
Fixes: ad0d315b4d4e ("platform/x86: pmc_atom: Add Siemens SIMATIC ...")
Tested-by: Michael Haener <michael.haener@siemens.com>
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Link: https://lore.kernel.org/r/20211213120502.20661-5-henning.schild@siemens.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/pmc_atom.c | 54 ++++++++++++++++++++-------------
 1 file changed, 33 insertions(+), 21 deletions(-)

diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c
index a9d2a4b98e57..a40fae6edc84 100644
--- a/drivers/platform/x86/pmc_atom.c
+++ b/drivers/platform/x86/pmc_atom.c
@@ -13,6 +13,7 @@
 #include <linux/io.h>
 #include <linux/platform_data/x86/clk-pmc-atom.h>
 #include <linux/platform_data/x86/pmc_atom.h>
+#include <linux/platform_data/x86/simatic-ipc.h>
 #include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/seq_file.h>
@@ -362,6 +363,30 @@ static void pmc_dbgfs_register(struct pmc_dev *pmc)
 }
 #endif /* CONFIG_DEBUG_FS */
 
+static bool pmc_clk_is_critical = true;
+
+static int dmi_callback(const struct dmi_system_id *d)
+{
+	pr_info("%s critclks quirk enabled\n", d->ident);
+
+	return 1;
+}
+
+static int dmi_callback_siemens(const struct dmi_system_id *d)
+{
+	u32 st_id;
+
+	if (dmi_walk(simatic_ipc_find_dmi_entry_helper, &st_id))
+		goto out;
+
+	if (st_id == SIMATIC_IPC_IPC227E || st_id == SIMATIC_IPC_IPC277E)
+		return dmi_callback(d);
+
+out:
+	pmc_clk_is_critical = false;
+	return 1;
+}
+
 /*
  * Some systems need one or more of their pmc_plt_clks to be
  * marked as critical.
@@ -370,6 +395,7 @@ static const struct dmi_system_id critclk_systems[] = {
 	{
 		/* pmc_plt_clk0 is used for an external HSIC USB HUB */
 		.ident = "MPL CEC1x",
+		.callback = dmi_callback,
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "MPL AG"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "CEC10 Family"),
@@ -378,6 +404,7 @@ static const struct dmi_system_id critclk_systems[] = {
 	{
 		/* pmc_plt_clk0 - 3 are used for the 4 ethernet controllers */
 		.ident = "Lex 3I380D",
+		.callback = dmi_callback,
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Lex BayTrail"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "3I380D"),
@@ -386,6 +413,7 @@ static const struct dmi_system_id critclk_systems[] = {
 	{
 		/* pmc_plt_clk* - are used for ethernet controllers */
 		.ident = "Lex 2I385SW",
+		.callback = dmi_callback,
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Lex BayTrail"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "2I385SW"),
@@ -394,30 +422,17 @@ static const struct dmi_system_id critclk_systems[] = {
 	{
 		/* pmc_plt_clk* - are used for ethernet controllers */
 		.ident = "Beckhoff Baytrail",
+		.callback = dmi_callback,
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Beckhoff Automation"),
 			DMI_MATCH(DMI_PRODUCT_FAMILY, "CBxx63"),
 		},
 	},
 	{
-		.ident = "SIMATIC IPC227E",
+		.ident = "SIEMENS AG",
+		.callback = dmi_callback_siemens,
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
-		},
-	},
-	{
-		.ident = "SIMATIC IPC277E",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "6AV7882-0"),
-		},
-	},
-	{
-		.ident = "CONNECT X300",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "A5E45074588"),
 		},
 	},
 
@@ -429,7 +444,6 @@ static int pmc_setup_clks(struct pci_dev *pdev, void __iomem *pmc_regmap,
 {
 	struct platform_device *clkdev;
 	struct pmc_clk_data *clk_data;
-	const struct dmi_system_id *d = dmi_first_match(critclk_systems);
 
 	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
 	if (!clk_data)
@@ -437,10 +451,8 @@ static int pmc_setup_clks(struct pci_dev *pdev, void __iomem *pmc_regmap,
 
 	clk_data->base = pmc_regmap; /* offset is added by client */
 	clk_data->clks = pmc_data->clks;
-	if (d) {
-		clk_data->critical = true;
-		pr_info("%s critclks quirk enabled\n", d->ident);
-	}
+	if (dmi_check_system(critclk_systems))
+		clk_data->critical = pmc_clk_is_critical;
 
 	clkdev = platform_device_register_data(&pdev->dev, "clk-pmc-atom",
 					       PLATFORM_DEVID_NONE,

From 7c4f5cd18cb169a4ce8610b1696ec152d62b4820 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 22 Dec 2021 11:50:23 +0100
Subject: [PATCH 55/78] platform/x86: intel_pmc_core: fix memleak on
 registration failure

In case device registration fails during module initialisation, the
platform device structure needs to be freed using platform_device_put()
to properly free all resources (e.g. the device name).

Fixes: 938835aa903a ("platform/x86: intel_pmc_core: do not create a static struct device")
Cc: stable@vger.kernel.org      # 5.9
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20211222105023.6205-1-johan@kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/intel/pmc/pltdrv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/pmc/pltdrv.c b/drivers/platform/x86/intel/pmc/pltdrv.c
index 73797680b895..15ca8afdd973 100644
--- a/drivers/platform/x86/intel/pmc/pltdrv.c
+++ b/drivers/platform/x86/intel/pmc/pltdrv.c
@@ -65,7 +65,7 @@ static int __init pmc_core_platform_init(void)
 
 	retval = platform_device_register(pmc_core_device);
 	if (retval)
-		kfree(pmc_core_device);
+		platform_device_put(pmc_core_device);
 
 	return retval;
 }

From 9734213ed413da5ac791a984c8cecf1612fe4888 Mon Sep 17 00:00:00 2001
From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date: Wed, 15 Dec 2021 17:28:02 -0800
Subject: [PATCH 56/78] tools/power/x86/intel-speed-select: Update max
 frequency

When BIOS disables turbo, the cpuinfo_max_freq will also be same as the
power up base frequency. When SST-PP causes increase in base frequency
the performance will be still limited to the old base frequency as the
cpuinfo_max_freq will not be updated.

In this case we need to update scaling_max frequency to the new
base_frequency. This will result in setting updated max performance
limit in the Pstate driver. So performance will not be limited to the
old base frequency.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 tools/power/x86/intel-speed-select/isst-config.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index bf9fd3549a1d..7967a04559e1 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -1599,6 +1599,7 @@ static void set_scaling_min_to_cpuinfo_max(int cpu)
 		    die_id != get_physical_die_id(i))
 			continue;
 
+		adjust_scaling_max_from_base_freq(i);
 		set_cpufreq_scaling_min_max_from_cpuinfo(i, 1, 0);
 		adjust_scaling_min_from_base_freq(i);
 	}
@@ -1615,6 +1616,7 @@ static void set_scaling_min_to_cpuinfo_min(int cpu)
 		    die_id != get_physical_die_id(i))
 			continue;
 
+		adjust_scaling_max_from_base_freq(i);
 		set_cpufreq_scaling_min_max_from_cpuinfo(i, 0, 0);
 	}
 }

From da78fc797fa4126f626303fe4d6cb474c1a80d26 Mon Sep 17 00:00:00 2001
From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date: Wed, 15 Dec 2021 17:46:56 -0800
Subject: [PATCH 57/78] tools/power/x86/intel-speed-select: v1.11 release

This release adds following change:
- Update max performance when BIOS disabled turbo

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 tools/power/x86/intel-speed-select/isst-config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 7967a04559e1..efe72fa48224 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -15,7 +15,7 @@ struct process_cmd_struct {
 	int arg;
 };
 
-static const char *version_str = "v1.10";
+static const char *version_str = "v1.11";
 static const int supported_api_ver = 1;
 static struct isst_if_platform_info isst_platform_info;
 static char *progname;

From 55fa3c9665bfcf32b21af8ecdeb48d5c5177d8d7 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 23 Dec 2021 20:07:50 +0100
Subject: [PATCH 58/78] platform/x86: x86-android-tablets: New driver for x86
 Android tablets

x86 tablets which ship with Android as (part of) the factory image
typically have various problems with their DSDTs. The factory kernels
shipped on these devices typically have device addresses and GPIOs
hardcoded in the kernel, rather then specified in their DSDT.

With the DSDT containing a random collection of devices which may or
may not actually be present as well as missing devices which are
actually present.

This driver, which loads only on affected models based on DMI matching,
adds DMI based instantiating of kernel devices for devices which are
missing from the DSDT, fixing e.g. battery monitoring, touchpads and/or
accelerometers not working.

Note the Kconfig help text also refers to "various fixes" ATM there are
no such fixes, but there are also known cases where entries are present
in the DSDT but they contain bugs, such as missing/wrong GPIOs. The plan
is to also add fixes for things like this here in the future.

This is the least ugly option to get these devices to fully work and to
do so without adding any extra code to the main kernel image (vmlinuz)
when built as a module.

Link: https://lore.kernel.org/platform-driver-x86/20211031162428.22368-1-hdegoede@redhat.com/
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211223190750.397487-1-hdegoede@redhat.com
---
 MAINTAINERS                                |   7 +
 drivers/platform/x86/Kconfig               |  17 ++
 drivers/platform/x86/Makefile              |   1 +
 drivers/platform/x86/x86-android-tablets.c | 321 +++++++++++++++++++++
 4 files changed, 346 insertions(+)
 create mode 100644 drivers/platform/x86/x86-android-tablets.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 7a2345ce8521..d7d063667af0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20667,6 +20667,13 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/mm
 F:	arch/x86/mm/
 
+X86 PLATFORM ANDROID TABLETS DSDT FIXUP DRIVER
+M:	Hans de Goede <hdegoede@redhat.com>
+L:	platform-driver-x86@vger.kernel.org
+S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
+F:	drivers/platform/x86/x86-android-tablets.c
+
 X86 PLATFORM DRIVERS
 M:	Hans de Goede <hdegoede@redhat.com>
 M:	Mark Gross <markgross@kernel.org>
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index afa0f9b0141d..b9a73df1820f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1004,6 +1004,23 @@ config TOUCHSCREEN_DMI
 	  the OS-image for the device. This option supplies the missing info.
 	  Enable this for x86 tablets with Silead or Chipone touchscreens.
 
+config X86_ANDROID_TABLETS
+	tristate "X86 Android tablet support"
+	depends on I2C && ACPI && GPIOLIB
+	help
+	  X86 tablets which ship with Android as (part of) the factory image
+	  typically have various problems with their DSDTs. The factory kernels
+	  shipped on these devices typically have device addresses and GPIOs
+	  hardcoded in the kernel, rather than specified in their DSDT.
+
+	  With the DSDT containing a random collection of devices which may or
+	  may not actually be present. This driver contains various fixes for
+	  such tablets, including instantiating kernel devices for devices which
+	  are missing from the DSDT.
+
+	  If you have a x86 Android tablet say Y or M here, for a generic x86
+	  distro config say M here.
+
 config FW_ATTR_CLASS
 	tristate
 
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index d477aad34fab..dce8a0e40e1b 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -113,6 +113,7 @@ obj-$(CONFIG_I2C_MULTI_INSTANTIATE)	+= i2c-multi-instantiate.o
 obj-$(CONFIG_MLX_PLATFORM)		+= mlx-platform.o
 obj-$(CONFIG_TOUCHSCREEN_DMI)		+= touchscreen_dmi.o
 obj-$(CONFIG_WIRELESS_HOTKEY)		+= wireless-hotkey.o
+obj-$(CONFIG_X86_ANDROID_TABLETS)	+= x86-android-tablets.o
 
 # Intel uncore drivers
 obj-$(CONFIG_INTEL_IPS)				+= intel_ips.o
diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
new file mode 100644
index 000000000000..4a04da27a3f4
--- /dev/null
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DMI based code to deal with broken DSDTs on X86 tablets which ship with
+ * Android as (part of) the factory image. The factory kernels shipped on these
+ * devices typically have a bunch of things hardcoded, rather than specified
+ * in their DSDT.
+ *
+ * Copyright (C) 2021 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/string.h>
+/* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
+#include "../../gpio/gpiolib.h"
+
+/*
+ * Helper code to get Linux IRQ numbers given a description of the IRQ source
+ * (either IOAPIC index, or GPIO chip name + pin-number).
+ */
+enum x86_acpi_irq_type {
+	X86_ACPI_IRQ_TYPE_NONE,
+	X86_ACPI_IRQ_TYPE_APIC,
+	X86_ACPI_IRQ_TYPE_GPIOINT,
+};
+
+struct x86_acpi_irq_data {
+	char *chip;   /* GPIO chip label (GPIOINT) */
+	enum x86_acpi_irq_type type;
+	int index;
+	int trigger;  /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
+	int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
+};
+
+static int x86_acpi_irq_helper_gpiochip_find(struct gpio_chip *gc, void *data)
+{
+	return gc->label && !strcmp(gc->label, data);
+}
+
+static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
+{
+	struct gpio_desc *gpiod;
+	struct gpio_chip *chip;
+	unsigned int irq_type;
+	int irq, ret;
+
+	switch (data->type) {
+	case X86_ACPI_IRQ_TYPE_APIC:
+		irq = acpi_register_gsi(NULL, data->index, data->trigger, data->polarity);
+		if (irq < 0)
+			pr_err("error %d getting APIC IRQ %d\n", irq, data->index);
+
+		return irq;
+	case X86_ACPI_IRQ_TYPE_GPIOINT:
+		/* Like acpi_dev_gpio_irq_get(), but without parsing ACPI resources */
+		chip = gpiochip_find(data->chip, x86_acpi_irq_helper_gpiochip_find);
+		if (!chip)
+			return -EPROBE_DEFER;
+
+		gpiod = gpiochip_get_desc(chip, data->index);
+		if (IS_ERR(gpiod)) {
+			ret = PTR_ERR(gpiod);
+			pr_err("error %d getting GPIO %s %d\n", ret, data->chip, data->index);
+			return ret;
+		}
+
+		irq = gpiod_to_irq(gpiod);
+		if (irq < 0) {
+			pr_err("error %d getting IRQ %s %d\n", irq, data->chip, data->index);
+			return irq;
+		}
+
+		irq_type = acpi_dev_get_irq_type(data->trigger, data->polarity);
+		if (irq_type != IRQ_TYPE_NONE && irq_type != irq_get_trigger_type(irq))
+			irq_set_irq_type(irq, irq_type);
+
+		return irq;
+	default:
+		return 0;
+	}
+}
+
+struct x86_i2c_client_info {
+	struct i2c_board_info board_info;
+	char *adapter_path;
+	struct x86_acpi_irq_data irq_data;
+};
+
+struct x86_dev_info {
+	const struct x86_i2c_client_info *i2c_client_info;
+	int i2c_client_count;
+};
+
+/*
+ * When booted with the BIOS set to Android mode the Chuwi Hi8 (CWI509) DSDT
+ * contains a whole bunch of bogus ACPI I2C devices and is missing entries
+ * for the touchscreen and the accelerometer.
+ */
+static const struct property_entry chuwi_hi8_gsl1680_props[] = {
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
+	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
+	PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi8.fw"),
+	{ }
+};
+
+static const struct software_node chuwi_hi8_gsl1680_node = {
+	.properties = chuwi_hi8_gsl1680_props,
+};
+
+static const char * const chuwi_hi8_mount_matrix[] = {
+	"1", "0", "0",
+	"0", "-1", "0",
+	"0", "0", "1"
+};
+
+static const struct property_entry chuwi_hi8_bma250e_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", chuwi_hi8_mount_matrix),
+	{ }
+};
+
+static const struct software_node chuwi_hi8_bma250e_node = {
+	.properties = chuwi_hi8_bma250e_props,
+};
+
+static const struct x86_i2c_client_info chuwi_hi8_i2c_clients[] __initconst = {
+	{
+		/* Silead touchscreen */
+		.board_info = {
+			.type = "gsl1680",
+			.addr = 0x40,
+			.swnode = &chuwi_hi8_gsl1680_node,
+		},
+		.adapter_path = "\\_SB_.I2C4",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_APIC,
+			.index = 0x44,
+			.trigger = ACPI_EDGE_SENSITIVE,
+			.polarity = ACPI_ACTIVE_HIGH,
+		},
+	}, {
+		/* BMA250E accelerometer */
+		.board_info = {
+			.type = "bma250e",
+			.addr = 0x18,
+			.swnode = &chuwi_hi8_bma250e_node,
+		},
+		.adapter_path = "\\_SB_.I2C3",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_GPIOINT,
+			.chip = "INT33FC:02",
+			.index = 23,
+			.trigger = ACPI_LEVEL_SENSITIVE,
+			.polarity = ACPI_ACTIVE_HIGH,
+		},
+	},
+};
+
+static const struct x86_dev_info chuwi_hi8_info __initconst = {
+	.i2c_client_info = chuwi_hi8_i2c_clients,
+	.i2c_client_count = ARRAY_SIZE(chuwi_hi8_i2c_clients),
+};
+
+/*
+ * If the EFI bootloader is not Xiaomi's own signed Android loader, then the
+ * Xiaomi Mi Pad 2 X86 tablet sets OSID in the DSDT to 1 (Windows), causing
+ * a bunch of devices to be hidden.
+ *
+ * This takes care of instantiating the hidden devices manually.
+ */
+static const char * const bq27520_suppliers[] = { "bq25890-charger" };
+
+static const struct property_entry bq27520_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq27520_suppliers),
+	{ }
+};
+
+static const struct software_node bq27520_node = {
+	.properties = bq27520_props,
+};
+
+static const struct x86_i2c_client_info xiaomi_mipad2_i2c_clients[] __initconst = {
+	{
+		/* BQ27520 fuel-gauge */
+		.board_info = {
+			.type = "bq27520",
+			.addr = 0x55,
+			.dev_name = "bq27520",
+			.swnode = &bq27520_node,
+		},
+		.adapter_path = "\\_SB_.PCI0.I2C1",
+	}, {
+		/* KTD2026 RGB notification LED controller */
+		.board_info = {
+			.type = "ktd2026",
+			.addr = 0x30,
+			.dev_name = "ktd2026",
+		},
+		.adapter_path = "\\_SB_.PCI0.I2C3",
+	},
+};
+
+static const struct x86_dev_info xiaomi_mipad2_info __initconst = {
+	.i2c_client_info = xiaomi_mipad2_i2c_clients,
+	.i2c_client_count = ARRAY_SIZE(xiaomi_mipad2_i2c_clients),
+};
+
+static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
+	{
+		/* Chuwi Hi8 (CWI509) */
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Hampoo"),
+			DMI_MATCH(DMI_BOARD_NAME, "BYT-PA03C"),
+			DMI_MATCH(DMI_SYS_VENDOR, "ilife"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "S806"),
+		},
+		.driver_data = (void *)&chuwi_hi8_info,
+	}, {
+		/* Xiaomi Mi Pad 2 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
+		},
+		.driver_data = (void *)&xiaomi_mipad2_info,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
+
+static int i2c_client_count;
+static struct i2c_client **i2c_clients;
+
+static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
+					     int idx)
+{
+	const struct x86_i2c_client_info *client_info = &dev_info->i2c_client_info[idx];
+	struct i2c_board_info board_info = client_info->board_info;
+	struct i2c_adapter *adap;
+	acpi_handle handle;
+	acpi_status status;
+
+	board_info.irq = x86_acpi_irq_helper_get(&client_info->irq_data);
+	if (board_info.irq < 0)
+		return board_info.irq;
+
+	status = acpi_get_handle(NULL, client_info->adapter_path, &handle);
+	if (ACPI_FAILURE(status)) {
+		pr_err("Error could not get %s handle\n", client_info->adapter_path);
+		return -ENODEV;
+	}
+
+	adap = i2c_acpi_find_adapter_by_handle(handle);
+	if (!adap) {
+		pr_err("error could not get %s adapter\n", client_info->adapter_path);
+		return -ENODEV;
+	}
+
+	i2c_clients[idx] = i2c_new_client_device(adap, &board_info);
+	put_device(&adap->dev);
+	if (IS_ERR(i2c_clients[idx]))
+		return dev_err_probe(&adap->dev, PTR_ERR(i2c_clients[idx]),
+				      "creating I2C-client %d\n", idx);
+
+	return 0;
+}
+
+static void x86_android_tablet_cleanup(void)
+{
+	int i;
+
+	for (i = 0; i < i2c_client_count; i++)
+		i2c_unregister_device(i2c_clients[i]);
+
+	kfree(i2c_clients);
+}
+
+static __init int x86_android_tablet_init(void)
+{
+	const struct x86_dev_info *dev_info;
+	const struct dmi_system_id *id;
+	int i, ret = 0;
+
+	id = dmi_first_match(x86_android_tablet_ids);
+	if (!id)
+		return -ENODEV;
+
+	dev_info = id->driver_data;
+
+	i2c_client_count = dev_info->i2c_client_count;
+
+	i2c_clients = kcalloc(i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
+	if (!i2c_clients)
+		return -ENOMEM;
+
+	for (i = 0; i < dev_info->i2c_client_count; i++) {
+		ret = x86_instantiate_i2c_client(dev_info, i);
+		if (ret < 0) {
+			x86_android_tablet_cleanup();
+			break;
+		}
+	}
+
+	return ret;
+}
+
+module_init(x86_android_tablet_init);
+module_exit(x86_android_tablet_cleanup);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com");
+MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver");
+MODULE_LICENSE("GPL");

From afca4cbe3a25dbe16424e6199793b38f41a17ed9 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 29 Dec 2021 15:13:32 +0100
Subject: [PATCH 59/78] x86/platform/uv: use default_groups in kobj_type

There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field.  Move the uv sysfs code to use default_groups field which has
been the preferred way since aa30f47cf666 ("kobject: Add support for
default attribute groups to kobj_type") so that we can soon get rid of
the obsolete default_attrs field.

Cc: Justin Ernst <justin.ernst@hpe.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mark Gross <markgross@kernel.org>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20211229141332.2552428-1-gregkh@linuxfoundation.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/uv_sysfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/uv_sysfs.c b/drivers/platform/x86/uv_sysfs.c
index 956a354b57c1..625b0b79d185 100644
--- a/drivers/platform/x86/uv_sysfs.c
+++ b/drivers/platform/x86/uv_sysfs.c
@@ -175,6 +175,7 @@ static struct attribute *uv_hub_attrs[] = {
 	&cnode_attribute.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(uv_hub);
 
 static void hub_release(struct kobject *kobj)
 {
@@ -205,7 +206,7 @@ static const struct sysfs_ops hub_sysfs_ops = {
 static struct kobj_type hub_attr_type = {
 	.release	= hub_release,
 	.sysfs_ops	= &hub_sysfs_ops,
-	.default_attrs	= uv_hub_attrs,
+	.default_groups	= uv_hub_groups,
 };
 
 static int uv_hubs_init(void)
@@ -327,6 +328,7 @@ static struct attribute *uv_port_attrs[] = {
 	&uv_port_conn_port_attribute.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(uv_port);
 
 static void uv_port_release(struct kobject *kobj)
 {
@@ -357,7 +359,7 @@ static const struct sysfs_ops uv_port_sysfs_ops = {
 static struct kobj_type uv_port_attr_type = {
 	.release	= uv_port_release,
 	.sysfs_ops	= &uv_port_sysfs_ops,
-	.default_attrs	= uv_port_attrs,
+	.default_groups	= uv_port_groups,
 };
 
 static int uv_ports_init(void)

From 998e7ea8c641fc6bbca1acd478c6824733ac9851 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 29 Dec 2021 15:14:54 +0100
Subject: [PATCH 60/78] platform/x86: intel-uncore-frequency: use
 default_groups in kobj_type

There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field.  Move the uncore-frequency sysfs code to use default_groups field
which has been the preferred way since aa30f47cf666 ("kobject: Add
support for default attribute groups to kobj_type") so that we can soon
get rid of the obsolete default_attrs field.

Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mark Gross <markgross@kernel.org>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20211229141454.2552950-1-gregkh@linuxfoundation.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/platform/x86/intel/uncore-frequency.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/uncore-frequency.c b/drivers/platform/x86/intel/uncore-frequency.c
index 3ee4c5c8a64f..4cd8254f2e40 100644
--- a/drivers/platform/x86/intel/uncore-frequency.c
+++ b/drivers/platform/x86/intel/uncore-frequency.c
@@ -225,6 +225,7 @@ static struct attribute *uncore_attrs[] = {
 	&min_freq_khz.attr,
 	NULL
 };
+ATTRIBUTE_GROUPS(uncore);
 
 static void uncore_sysfs_entry_release(struct kobject *kobj)
 {
@@ -236,7 +237,7 @@ static void uncore_sysfs_entry_release(struct kobject *kobj)
 static struct kobj_type uncore_ktype = {
 	.release = uncore_sysfs_entry_release,
 	.sysfs_ops = &kobj_sysfs_ops,
-	.default_attrs = uncore_attrs,
+	.default_groups = uncore_groups,
 };
 
 /* Caller provides protection */

From c8e2d921aa968bacc869a0e07baac2ff66a5d6c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Wed, 5 Jan 2022 07:42:38 +0100
Subject: [PATCH 61/78] power: supply: fix charge_behaviour attribute
 initialization
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

All properties have to be added to power_supply_attrs which was missed
before.

Fixes: 1b0b6cc8030d ("power: supply: add charge_behaviour attributes")
Reported-by: Heiner Kallweit <hkallweit1@gmail.com>
Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20220105064239.2689-1-linux@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/power/supply/power_supply_sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index 5e3b8c15ddbe..491ffec7bf47 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -178,6 +178,7 @@ static struct power_supply_attr power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
 	POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
 	POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
+	POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR),
 	POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
 	POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
 	POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),

From 761db353d9e286c1ce26d6f30d6c8b2bb60dcb23 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 25 Dec 2021 12:55:09 +0100
Subject: [PATCH 62/78] platform/x86: Add intel_crystal_cove_charger driver

Driver for the external-charger IRQ pass-through function of the
Intel Bay Trail Crystal Cove PMIC.

Note this is NOT a power_supply class driver, it just deals with IRQ
pass-through, this requires this separate driver because the PMIC's
level 2 interrupt for this must be explicitly acked.

This new driver gets enabled by the existing X86_ANDROID_TABLETS Kconfig
option because the x86-android-tablets module is the only consumer of the
exported external-charger IRQ.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211225115509.94891-5-hdegoede@redhat.com
---
 drivers/platform/x86/intel/Makefile           |   2 +
 .../platform/x86/intel/crystal_cove_charger.c | 153 ++++++++++++++++++
 2 files changed, 155 insertions(+)
 create mode 100644 drivers/platform/x86/intel/crystal_cove_charger.c

diff --git a/drivers/platform/x86/intel/Makefile b/drivers/platform/x86/intel/Makefile
index 7c24be2423d8..174a80a6c87c 100644
--- a/drivers/platform/x86/intel/Makefile
+++ b/drivers/platform/x86/intel/Makefile
@@ -30,6 +30,8 @@ obj-$(CONFIG_INTEL_OAKTRAIL)		+= intel_oaktrail.o
 # Intel PMIC / PMC / P-Unit drivers
 intel_bxtwc_tmu-y			:= bxtwc_tmu.o
 obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU)	+= intel_bxtwc_tmu.o
+intel_crystal_cove_charger-y		:= crystal_cove_charger.o
+obj-$(CONFIG_X86_ANDROID_TABLETS)	+= intel_crystal_cove_charger.o
 intel_chtdc_ti_pwrbtn-y			:= chtdc_ti_pwrbtn.o
 obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN)	+= intel_chtdc_ti_pwrbtn.o
 intel_mrfld_pwrbtn-y			:= mrfld_pwrbtn.o
diff --git a/drivers/platform/x86/intel/crystal_cove_charger.c b/drivers/platform/x86/intel/crystal_cove_charger.c
new file mode 100644
index 000000000000..0374bc742513
--- /dev/null
+++ b/drivers/platform/x86/intel/crystal_cove_charger.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for the external-charger IRQ pass-through function of the
+ * Intel Bay Trail Crystal Cove PMIC.
+ *
+ * Note this is NOT a power_supply class driver, it just deals with IRQ
+ * pass-through, this requires a separate driver because the PMIC's
+ * level 2 interrupt for this must be explicitly acked.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define CHGRIRQ_REG					0x0a
+
+struct crystal_cove_charger_data {
+	struct mutex buslock; /* irq_bus_lock */
+	struct irq_chip irqchip;
+	struct regmap *regmap;
+	struct irq_domain *irq_domain;
+	int irq;
+	int charger_irq;
+	bool irq_enabled;
+	bool irq_is_enabled;
+};
+
+static irqreturn_t crystal_cove_charger_irq(int irq, void *data)
+{
+	struct crystal_cove_charger_data *charger = data;
+
+	/* No need to read CHGRIRQ_REG as there is only 1 IRQ */
+	handle_nested_irq(charger->charger_irq);
+
+	/* Ack CHGRIRQ 0 */
+	regmap_write(charger->regmap, CHGRIRQ_REG, BIT(0));
+
+	return IRQ_HANDLED;
+}
+
+static void crystal_cove_charger_irq_bus_lock(struct irq_data *data)
+{
+	struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data);
+
+	mutex_lock(&charger->buslock);
+}
+
+static void crystal_cove_charger_irq_bus_sync_unlock(struct irq_data *data)
+{
+	struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data);
+
+	if (charger->irq_is_enabled != charger->irq_enabled) {
+		if (charger->irq_enabled)
+			enable_irq(charger->irq);
+		else
+			disable_irq(charger->irq);
+
+		charger->irq_is_enabled = charger->irq_enabled;
+	}
+
+	mutex_unlock(&charger->buslock);
+}
+
+static void crystal_cove_charger_irq_unmask(struct irq_data *data)
+{
+	struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data);
+
+	charger->irq_enabled = true;
+}
+
+static void crystal_cove_charger_irq_mask(struct irq_data *data)
+{
+	struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data);
+
+	charger->irq_enabled = false;
+}
+
+static void crystal_cove_charger_rm_irq_domain(void *data)
+{
+	struct crystal_cove_charger_data *charger = data;
+
+	irq_domain_remove(charger->irq_domain);
+}
+
+static int crystal_cove_charger_probe(struct platform_device *pdev)
+{
+	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
+	struct crystal_cove_charger_data *charger;
+	int ret;
+
+	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
+	if (!charger)
+		return -ENOMEM;
+
+	charger->regmap = pmic->regmap;
+	mutex_init(&charger->buslock);
+
+	charger->irq = platform_get_irq(pdev, 0);
+	if (charger->irq < 0)
+		return charger->irq;
+
+	charger->irq_domain = irq_domain_create_linear(dev_fwnode(pdev->dev.parent), 1,
+						       &irq_domain_simple_ops, NULL);
+	if (!charger->irq_domain)
+		return -ENOMEM;
+
+	/* Distuingish IRQ domain from others sharing (MFD) the same fwnode */
+	irq_domain_update_bus_token(charger->irq_domain, DOMAIN_BUS_WAKEUP);
+
+	ret = devm_add_action_or_reset(&pdev->dev, crystal_cove_charger_rm_irq_domain, charger);
+	if (ret)
+		return ret;
+
+	charger->charger_irq = irq_create_mapping(charger->irq_domain, 0);
+	if (!charger->charger_irq)
+		return -ENOMEM;
+
+	charger->irqchip.name = KBUILD_MODNAME;
+	charger->irqchip.irq_unmask = crystal_cove_charger_irq_unmask;
+	charger->irqchip.irq_mask = crystal_cove_charger_irq_mask;
+	charger->irqchip.irq_bus_lock = crystal_cove_charger_irq_bus_lock;
+	charger->irqchip.irq_bus_sync_unlock = crystal_cove_charger_irq_bus_sync_unlock;
+
+	irq_set_chip_data(charger->charger_irq, charger);
+	irq_set_chip_and_handler(charger->charger_irq, &charger->irqchip, handle_simple_irq);
+	irq_set_nested_thread(charger->charger_irq, true);
+	irq_set_noprobe(charger->charger_irq);
+
+	ret = devm_request_threaded_irq(&pdev->dev, charger->irq, NULL,
+					crystal_cove_charger_irq,
+					IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					KBUILD_MODNAME, charger);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "requesting irq\n");
+
+	return 0;
+}
+
+static struct platform_driver crystal_cove_charger_driver = {
+	.probe = crystal_cove_charger_probe,
+	.driver = {
+		.name = "crystal_cove_charger",
+	},
+};
+module_platform_driver(crystal_cove_charger_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com");
+MODULE_DESCRIPTION("Intel Bay Trail Crystal Cove external charger IRQ pass-through");
+MODULE_LICENSE("GPL");

From 16bbe382bb22af695d4001a52389cee56dd8310b Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 25 Dec 2021 13:02:46 +0100
Subject: [PATCH 63/78] platform/x86: touchscreen_dmi: Correct min/max values
 for Chuwi Hi10 Pro (CWI529) tablet

The firmware distributed as part of the Windows and Android drivers uses
significantly different min and max values for the x- and y-axis,
compared to the EFI's embedded touchscreen firmware.

The difference is large enough that e.g. typing on an onscreen keyboard
results in the wrong "keys" getting pressed.

Adjust the values to match those of the firmware distributed with the
Windows and Android drivers (which is necessary for pen support) and
put the EFI-fw version's min/max values in the new "silead,efi-fw-min-max"
property. The silead driver will use these when it is using the
EFI embedded firmware, so as to not regress functionality in that case.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211225120247.95380-1-hdegoede@redhat.com
---
 drivers/platform/x86/touchscreen_dmi.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index 17dd54d4b783..92d274eb9dbe 100644
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c
@@ -124,13 +124,16 @@ static const struct ts_dmi_data chuwi_hi10_plus_data = {
 	.properties     = chuwi_hi10_plus_props,
 };
 
+static const u32 chuwi_hi10_pro_efi_min_max[] = { 8, 1911, 8, 1271 };
+
 static const struct property_entry chuwi_hi10_pro_props[] = {
-	PROPERTY_ENTRY_U32("touchscreen-min-x", 8),
-	PROPERTY_ENTRY_U32("touchscreen-min-y", 8),
-	PROPERTY_ENTRY_U32("touchscreen-size-x", 1912),
-	PROPERTY_ENTRY_U32("touchscreen-size-y", 1272),
+	PROPERTY_ENTRY_U32("touchscreen-min-x", 80),
+	PROPERTY_ENTRY_U32("touchscreen-min-y", 26),
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 1962),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 1254),
 	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 	PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi10-pro.fw"),
+	PROPERTY_ENTRY_U32_ARRAY("silead,efi-fw-min-max", chuwi_hi10_pro_efi_min_max),
 	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 	PROPERTY_ENTRY_BOOL("silead,home-button"),
 	{ }

From bfe92170c939297a9623d973a122fbe1d9da8c14 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 25 Dec 2021 13:02:47 +0100
Subject: [PATCH 64/78] platform/x86: touchscreen_dmi: Enable pen support on
 the Chuwi Hi10 Plus and Pro

Both the Chuwi Hi10 Plus (CWI527) and the Chuwi Hi10 Pro (CWI529) tablets
support being used together with the Hi H2 pen.

Add the necessary properties to enable the new support for this in the
silead touchscreen driver.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211225120247.95380-2-hdegoede@redhat.com
---
 drivers/platform/x86/touchscreen_dmi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index 92d274eb9dbe..7acec7eaf4cb 100644
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c
@@ -107,6 +107,9 @@ static const struct property_entry chuwi_hi10_plus_props[] = {
 	PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi10plus.fw"),
 	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 	PROPERTY_ENTRY_BOOL("silead,home-button"),
+	PROPERTY_ENTRY_BOOL("silead,pen-supported"),
+	PROPERTY_ENTRY_U32("silead,pen-resolution-x", 8),
+	PROPERTY_ENTRY_U32("silead,pen-resolution-y", 8),
 	{ }
 };
 
@@ -136,6 +139,9 @@ static const struct property_entry chuwi_hi10_pro_props[] = {
 	PROPERTY_ENTRY_U32_ARRAY("silead,efi-fw-min-max", chuwi_hi10_pro_efi_min_max),
 	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 	PROPERTY_ENTRY_BOOL("silead,home-button"),
+	PROPERTY_ENTRY_BOOL("silead,pen-supported"),
+	PROPERTY_ENTRY_U32("silead,pen-resolution-x", 8),
+	PROPERTY_ENTRY_U32("silead,pen-resolution-y", 8),
 	{ }
 };
 

From 7a4af4b891b875b50ddfeb9b566fcc454744ab04 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 3 Jan 2022 12:27:00 +0100
Subject: [PATCH 65/78] platform/x86: touchscreen_dmi: Remove the Glavey
 TM800A550L entry

The Glavey TM800A550L tablet is a tablet which ships with Android as
factory OS. As such it has the typical broken DSDT which x86 Android
tablets tend to have.

Specifically the touchscreen ACPI device node is missing the IRQ for
the touchscreen. So far users were expected to fix this with a DSDT
overlay, but support for the TM800A550L has been added to the new
x86-android-modules kernel-module and that will now automatically
instantiate a proper i2c-client with the IRQ set for the touchscreen,
including the necessary device-properties for the firmware loading.

This means that the touchscreen_dmi entry for the TM800A550L is
no longer necessary (and it no longer matches either since the
touchscreen is no longer enumerated through ACPI), remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220103112700.111414-1-hdegoede@redhat.com
---
 drivers/platform/x86/touchscreen_dmi.c | 21 ---------------------
 1 file changed, 21 deletions(-)

diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index 7acec7eaf4cb..494f23052678 100644
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c
@@ -361,18 +361,6 @@ static const struct ts_dmi_data gdix1001_01_upside_down_data = {
 	.properties	= gdix1001_upside_down_props,
 };
 
-static const struct property_entry glavey_tm800a550l_props[] = {
-	PROPERTY_ENTRY_STRING("firmware-name", "gt912-glavey-tm800a550l.fw"),
-	PROPERTY_ENTRY_STRING("goodix,config-name", "gt912-glavey-tm800a550l.cfg"),
-	PROPERTY_ENTRY_U32("goodix,main-clk", 54),
-	{ }
-};
-
-static const struct ts_dmi_data glavey_tm800a550l_data = {
-	.acpi_name	= "GDIX1001:00",
-	.properties	= glavey_tm800a550l_props,
-};
-
 static const struct property_entry gp_electronic_t701_props[] = {
 	PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
 	PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
@@ -1149,15 +1137,6 @@ const struct dmi_system_id touchscreen_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "eSTAR BEAUTY HD Intel Quad core"),
 		},
 	},
-	{	/* Glavey TM800A550L */
-		.driver_data = (void *)&glavey_tm800a550l_data,
-		.matches = {
-			DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
-			DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
-			/* Above strings are too generic, also match on BIOS version */
-			DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
-		},
-	},
 	{
 		/* GP-electronic T701 */
 		.driver_data = (void *)&gp_electronic_t701_data,

From fc64a2b21603dc1e1bae6f34b4bccfadc992894f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:23 +0100
Subject: [PATCH 66/78] platform/x86: x86-android-tablets: Don't return
 -EPROBE_DEFER from a non probe() function

The x86-android-tablets code all runs from module_init, so returning
-EPROBE_DEFER is not appropriate. Instead log an error and bail.

This path should never get hit since PINCTRL_BAYTRAIL is a bool.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-5-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 4a04da27a3f4..ea033d7f4439 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -63,8 +63,10 @@ static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
 	case X86_ACPI_IRQ_TYPE_GPIOINT:
 		/* Like acpi_dev_gpio_irq_get(), but without parsing ACPI resources */
 		chip = gpiochip_find(data->chip, x86_acpi_irq_helper_gpiochip_find);
-		if (!chip)
-			return -EPROBE_DEFER;
+		if (!chip) {
+			pr_err("error cannot find GPIO chip %s\n", data->chip);
+			return -ENODEV;
+		}
 
 		gpiod = gpiochip_get_desc(chip, data->index);
 		if (IS_ERR(gpiod)) {

From cd26465fbc03beaa68979c06fc983be86eafcb4b Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:24 +0100
Subject: [PATCH 67/78] platform/x86: x86-android-tablets: Add support for PMIC
 interrupts

The Crystal Cove PMIC has a pin which can be used to connect the IRQ of
an external charger IC. On some boards this is used so we need a way to
look this up.

Note that the Intel PMICs have 2 levels of interrupts and thus
2 levels of IRQ domains all tied to a single fwnode.

Level 1 is the irqchip which demultiplexes the actual PMIC interrupt into
interrupts for the various MFD cells. Level 2 are the irqchips used in the
cell drivers which themselves export IRQs, such as the crystal_cove_gpio
driver, which de-multiplexes the level 2 interrupts for the GPIOs into
individual per GPIO IRQs.

The crystal_cove_charger driver registers an irqchip with a single IRQ for
the charger driver to consume. Note the MFD cell IRQ cannot be consumed
directly because the level 2 interrupts must be explicitly acked.

To allow finding the right IRQ domain when looking up the IRQ for
the charger, the crystal_cove_charger driver sets a DOMAIN_BUS_WIRED token
on its IRQ domain.

Add support for looking up the IRQ from the crystal_cove_charger driver.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-6-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 31 +++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index ea033d7f4439..44138882bc9f 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -17,6 +17,7 @@
 #include <linux/gpio/machine.h>
 #include <linux/i2c.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/string.h>
@@ -31,11 +32,13 @@ enum x86_acpi_irq_type {
 	X86_ACPI_IRQ_TYPE_NONE,
 	X86_ACPI_IRQ_TYPE_APIC,
 	X86_ACPI_IRQ_TYPE_GPIOINT,
+	X86_ACPI_IRQ_TYPE_PMIC,
 };
 
 struct x86_acpi_irq_data {
-	char *chip;   /* GPIO chip label (GPIOINT) */
+	char *chip;   /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
 	enum x86_acpi_irq_type type;
+	enum irq_domain_bus_token domain;
 	int index;
 	int trigger;  /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
 	int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
@@ -48,9 +51,14 @@ static int x86_acpi_irq_helper_gpiochip_find(struct gpio_chip *gc, void *data)
 
 static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
 {
+	struct irq_fwspec fwspec = { };
+	struct irq_domain *domain;
+	struct acpi_device *adev;
 	struct gpio_desc *gpiod;
 	struct gpio_chip *chip;
 	unsigned int irq_type;
+	acpi_handle handle;
+	acpi_status status;
 	int irq, ret;
 
 	switch (data->type) {
@@ -86,6 +94,27 @@ static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
 			irq_set_irq_type(irq, irq_type);
 
 		return irq;
+	case X86_ACPI_IRQ_TYPE_PMIC:
+		status = acpi_get_handle(NULL, data->chip, &handle);
+		if (ACPI_FAILURE(status)) {
+			pr_err("error could not get %s handle\n", data->chip);
+			return -ENODEV;
+		}
+
+		acpi_bus_get_device(handle, &adev);
+		if (!adev) {
+			pr_err("error could not get %s adev\n", data->chip);
+			return -ENODEV;
+		}
+
+		fwspec.fwnode = acpi_fwnode_handle(adev);
+		domain = irq_find_matching_fwspec(&fwspec, data->domain);
+		if (!domain) {
+			pr_err("error could not find IRQ domain for %s\n", data->chip);
+			return -ENODEV;
+		}
+
+		return irq_create_mapping(domain, data->index);
 	default:
 		return 0;
 	}

From 5eba0141206ea521bbcfcf5067c174e825e943dd Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:25 +0100
Subject: [PATCH 68/78] platform/x86: x86-android-tablets: Add support for
 instantiating platform-devs

Add support for instantiating platform-devs, note this also makes some
small changes to the i2c_client instantiating code to make the 2 flows
identical.

Specifically for the pdevs flow pdev_count must only be set after
allocating the pdevs array, to avoid a NULL ptr deref in
x86_android_tablet_cleanup() and the i2c_clients flow is updated
to work the same way.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-7-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 36 ++++++++++++++++++----
 1 file changed, 30 insertions(+), 6 deletions(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 44138882bc9f..4bcad05d4039 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -20,6 +20,7 @@
 #include <linux/irqdomain.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
 #include <linux/string.h>
 /* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
 #include "../../gpio/gpiolib.h"
@@ -128,7 +129,9 @@ struct x86_i2c_client_info {
 
 struct x86_dev_info {
 	const struct x86_i2c_client_info *i2c_client_info;
+	const struct platform_device_info *pdev_info;
 	int i2c_client_count;
+	int pdev_count;
 };
 
 /*
@@ -269,7 +272,9 @@ static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
 MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
 
 static int i2c_client_count;
+static int pdev_count;
 static struct i2c_client **i2c_clients;
+static struct platform_device **pdevs;
 
 static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
 					     int idx)
@@ -309,6 +314,11 @@ static void x86_android_tablet_cleanup(void)
 {
 	int i;
 
+	for (i = 0; i < pdev_count; i++)
+		platform_device_unregister(pdevs[i]);
+
+	kfree(pdevs);
+
 	for (i = 0; i < i2c_client_count; i++)
 		i2c_unregister_device(i2c_clients[i]);
 
@@ -327,21 +337,35 @@ static __init int x86_android_tablet_init(void)
 
 	dev_info = id->driver_data;
 
-	i2c_client_count = dev_info->i2c_client_count;
-
-	i2c_clients = kcalloc(i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
+	i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
 	if (!i2c_clients)
 		return -ENOMEM;
 
-	for (i = 0; i < dev_info->i2c_client_count; i++) {
+	i2c_client_count = dev_info->i2c_client_count;
+	for (i = 0; i < i2c_client_count; i++) {
 		ret = x86_instantiate_i2c_client(dev_info, i);
 		if (ret < 0) {
 			x86_android_tablet_cleanup();
-			break;
+			return ret;
 		}
 	}
 
-	return ret;
+	pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL);
+	if (!pdevs) {
+		x86_android_tablet_cleanup();
+		return -ENOMEM;
+	}
+
+	pdev_count = dev_info->pdev_count;
+	for (i = 0; i < pdev_count; i++) {
+		pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
+		if (IS_ERR(pdevs[i])) {
+			x86_android_tablet_cleanup();
+			return PTR_ERR(pdevs[i]);
+		}
+	}
+
+	return 0;
 }
 
 module_init(x86_android_tablet_init);

From c2138b25d5a42e527588bd26cb2409352d8c0743 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:26 +0100
Subject: [PATCH 69/78] platform/x86: x86-android-tablets: Add support for
 instantiating serdevs

Add support for instantiating serdevs, this is necessary on some boards
where the serdev info in the DSDT has issues.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-8-hdegoede@redhat.com
---
 drivers/platform/x86/Kconfig               |   2 +-
 drivers/platform/x86/x86-android-tablets.c | 101 +++++++++++++++++++++
 2 files changed, 102 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index b9a73df1820f..833abec54644 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1006,7 +1006,7 @@ config TOUCHSCREEN_DMI
 
 config X86_ANDROID_TABLETS
 	tristate "X86 Android tablet support"
-	depends on I2C && ACPI && GPIOLIB
+	depends on I2C && SERIAL_DEV_BUS && ACPI && GPIOLIB
 	help
 	  X86 tablets which ship with Android as (part of) the factory image
 	  typically have various problems with their DSDTs. The factory kernels
diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 4bcad05d4039..5267e57c4fea 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
+#include <linux/serdev.h>
 #include <linux/string.h>
 /* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
 #include "../../gpio/gpiolib.h"
@@ -127,11 +128,26 @@ struct x86_i2c_client_info {
 	struct x86_acpi_irq_data irq_data;
 };
 
+struct x86_serdev_info {
+	const char *ctrl_hid;
+	const char *ctrl_uid;
+	const char *ctrl_devname;
+	/*
+	 * ATM the serdev core only supports of or ACPI matching; and sofar all
+	 * Android x86 tablets DSDTs have usable serdev nodes, but sometimes
+	 * under the wrong controller. So we just tie the existing serdev ACPI
+	 * node to the right controller.
+	 */
+	const char *serdev_hid;
+};
+
 struct x86_dev_info {
 	const struct x86_i2c_client_info *i2c_client_info;
 	const struct platform_device_info *pdev_info;
+	const struct x86_serdev_info *serdev_info;
 	int i2c_client_count;
 	int pdev_count;
+	int serdev_count;
 };
 
 /*
@@ -273,8 +289,10 @@ MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
 
 static int i2c_client_count;
 static int pdev_count;
+static int serdev_count;
 static struct i2c_client **i2c_clients;
 static struct platform_device **pdevs;
+static struct serdev_device **serdevs;
 
 static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
 					     int idx)
@@ -310,10 +328,78 @@ static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info
 	return 0;
 }
 
+static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int idx)
+{
+	struct acpi_device *ctrl_adev, *serdev_adev;
+	struct serdev_device *serdev;
+	struct device *ctrl_dev;
+	int ret = -ENODEV;
+
+	ctrl_adev = acpi_dev_get_first_match_dev(info->ctrl_hid, info->ctrl_uid, -1);
+	if (!ctrl_adev) {
+		pr_err("error could not get %s/%s ctrl adev\n",
+		       info->ctrl_hid, info->ctrl_uid);
+		return -ENODEV;
+	}
+
+	serdev_adev = acpi_dev_get_first_match_dev(info->serdev_hid, NULL, -1);
+	if (!serdev_adev) {
+		pr_err("error could not get %s serdev adev\n", info->serdev_hid);
+		goto put_ctrl_adev;
+	}
+
+	/* get_first_physical_node() returns a weak ref, no need to put() it */
+	ctrl_dev = acpi_get_first_physical_node(ctrl_adev);
+	if (!ctrl_dev)	{
+		pr_err("error could not get %s/%s ctrl physical dev\n",
+		       info->ctrl_hid, info->ctrl_uid);
+		goto put_serdev_adev;
+	}
+
+	/* ctrl_dev now points to the controller's parent, get the controller */
+	ctrl_dev = device_find_child_by_name(ctrl_dev, info->ctrl_devname);
+	if (!ctrl_dev) {
+		pr_err("error could not get %s/%s %s ctrl dev\n",
+		       info->ctrl_hid, info->ctrl_uid, info->ctrl_devname);
+		goto put_serdev_adev;
+	}
+
+	serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev));
+	if (!serdev) {
+		ret = -ENOMEM;
+		goto put_serdev_adev;
+	}
+
+	ACPI_COMPANION_SET(&serdev->dev, serdev_adev);
+	acpi_device_set_enumerated(serdev_adev);
+
+	ret = serdev_device_add(serdev);
+	if (ret) {
+		dev_err(&serdev->dev, "error %d adding serdev\n", ret);
+		serdev_device_put(serdev);
+		goto put_serdev_adev;
+	}
+
+	serdevs[idx] = serdev;
+
+put_serdev_adev:
+	acpi_dev_put(serdev_adev);
+put_ctrl_adev:
+	acpi_dev_put(ctrl_adev);
+	return ret;
+}
+
 static void x86_android_tablet_cleanup(void)
 {
 	int i;
 
+	for (i = 0; i < serdev_count; i++) {
+		if (serdevs[i])
+			serdev_device_remove(serdevs[i]);
+	}
+
+	kfree(serdevs);
+
 	for (i = 0; i < pdev_count; i++)
 		platform_device_unregister(pdevs[i]);
 
@@ -365,6 +451,21 @@ static __init int x86_android_tablet_init(void)
 		}
 	}
 
+	serdevs = kcalloc(dev_info->serdev_count, sizeof(*serdevs), GFP_KERNEL);
+	if (!serdevs) {
+		x86_android_tablet_cleanup();
+		return -ENOMEM;
+	}
+
+	serdev_count = dev_info->serdev_count;
+	for (i = 0; i < serdev_count; i++) {
+		ret = x86_instantiate_serdev(&dev_info->serdev_info[i], i);
+		if (ret < 0) {
+			x86_android_tablet_cleanup();
+			return ret;
+		}
+	}
+
 	return 0;
 }
 

From ef2ac11493e24f6c5ad850761aab39a9095010fe Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:27 +0100
Subject: [PATCH 70/78] platform/x86: x86-android-tablets: Add support for
 registering GPIO lookup tables

Add support for registering GPIO lookup tables.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-9-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 5267e57c4fea..0b521e4671aa 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -142,6 +142,7 @@ struct x86_serdev_info {
 };
 
 struct x86_dev_info {
+	struct gpiod_lookup_table **gpiod_lookup_tables;
 	const struct x86_i2c_client_info *i2c_client_info;
 	const struct platform_device_info *pdev_info;
 	const struct x86_serdev_info *serdev_info;
@@ -293,6 +294,7 @@ static int serdev_count;
 static struct i2c_client **i2c_clients;
 static struct platform_device **pdevs;
 static struct serdev_device **serdevs;
+static struct gpiod_lookup_table **gpiod_lookup_tables;
 
 static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
 					     int idx)
@@ -409,6 +411,9 @@ static void x86_android_tablet_cleanup(void)
 		i2c_unregister_device(i2c_clients[i]);
 
 	kfree(i2c_clients);
+
+	for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
+		gpiod_remove_lookup_table(gpiod_lookup_tables[i]);
 }
 
 static __init int x86_android_tablet_init(void)
@@ -423,6 +428,10 @@ static __init int x86_android_tablet_init(void)
 
 	dev_info = id->driver_data;
 
+	gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
+	for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
+		gpiod_add_lookup_table(gpiod_lookup_tables[i]);
+
 	i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
 	if (!i2c_clients)
 		return -ENOMEM;

From f08aebe9af935422ec58ff3003eda4dfb91d2dd2 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:28 +0100
Subject: [PATCH 71/78] platform/x86: x86-android-tablets: Add support for
 preloading modules

Since the x86-android-tablets code does all it work from module_init() it
cannot use -EPROBE_DEFER to wait for e.g. interrupt providing GPIO-chips
or PMIC-cells to show up.

To make sure things will still work when some necessary resource providers
are build as module allow the per board info to specify a list of modules
to pre-load before instantiating the I2C clients.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-10-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 0b521e4671aa..3c01c8607c26 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -142,6 +142,7 @@ struct x86_serdev_info {
 };
 
 struct x86_dev_info {
+	const char * const *modules;
 	struct gpiod_lookup_table **gpiod_lookup_tables;
 	const struct x86_i2c_client_info *i2c_client_info;
 	const struct platform_device_info *pdev_info;
@@ -428,6 +429,13 @@ static __init int x86_android_tablet_init(void)
 
 	dev_info = id->driver_data;
 
+	/*
+	 * Since this runs from module_init() it cannot use -EPROBE_DEFER,
+	 * instead pre-load any modules which are listed as requirements.
+	 */
+	for (i = 0; dev_info->modules && dev_info->modules[i]; i++)
+		request_module(dev_info->modules[i]);
+
 	gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
 	for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
 		gpiod_add_lookup_table(gpiod_lookup_tables[i]);

From 29272d642468cfdf59853630511830780f09c92a Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:29 +0100
Subject: [PATCH 72/78] platform/x86: x86-android-tablets: Add Asus TF103C data

Asus TF103C tablets have an Android factory img with everything hardcoded
in the kernel instead of properly described in the DSDT.

Add support for manually instantiating all the missing I2C devices by
adding the necessary device info to the x86-android-tablets module.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-11-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 165 +++++++++++++++++++++
 1 file changed, 165 insertions(+)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 3c01c8607c26..1f4300e837c6 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
+#include <linux/power/bq24190_charger.h>
 #include <linux/serdev.h>
 #include <linux/string.h>
 /* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
@@ -152,6 +153,162 @@ struct x86_dev_info {
 	int serdev_count;
 };
 
+/* Generic / shared bq24190 settings */
+static const char * const bq24190_suppliers[] = { "tusb1210-psy" };
+
+static const struct property_entry bq24190_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq24190_suppliers),
+	PROPERTY_ENTRY_BOOL("omit-battery-class"),
+	PROPERTY_ENTRY_BOOL("disable-reset"),
+	{ }
+};
+
+static const struct software_node bq24190_node = {
+	.properties = bq24190_props,
+};
+
+/* For enableing the bq24190 5V boost based on id-pin */
+static struct regulator_consumer_supply intel_int3496_consumer = {
+	.supply = "vbus",
+	.dev_name = "intel-int3496",
+};
+
+static const struct regulator_init_data bq24190_vbus_init_data = {
+	.constraints = {
+		.name = "bq24190_vbus",
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.consumer_supplies = &intel_int3496_consumer,
+	.num_consumer_supplies = 1,
+};
+
+static struct bq24190_platform_data bq24190_pdata = {
+	.regulator_init_data = &bq24190_vbus_init_data,
+};
+
+static const char * const bq24190_modules[] __initconst = {
+	"crystal_cove_charger", /* For the bq24190 IRQ */
+	"bq24190_charger",      /* For the Vbus regulator for intel-int3496 */
+	NULL
+};
+
+/* Generic pdevs array and gpio-lookups for micro USB ID pin handling */
+static const struct platform_device_info int3496_pdevs[] __initconst = {
+	{
+		/* For micro USB ID pin handling */
+		.name = "intel-int3496",
+		.id = PLATFORM_DEVID_NONE,
+	},
+};
+
+static struct gpiod_lookup_table int3496_gpo2_pin22_gpios = {
+	.dev_id = "intel-int3496",
+	.table = {
+		GPIO_LOOKUP("INT33FC:02", 22, "id", GPIO_ACTIVE_HIGH),
+		{ }
+	},
+};
+
+/* Asus TF103C tablets have an Android factory img with everything hardcoded */
+static const char * const asus_tf103c_accel_mount_matrix[] = {
+	"0", "-1", "0",
+	"-1", "0", "0",
+	"0", "0", "1"
+};
+
+static const struct property_entry asus_tf103c_accel_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", asus_tf103c_accel_mount_matrix),
+	{ }
+};
+
+static const struct software_node asus_tf103c_accel_node = {
+	.properties = asus_tf103c_accel_props,
+};
+
+static const struct property_entry asus_tf103c_touchscreen_props[] = {
+	PROPERTY_ENTRY_STRING("compatible", "atmel,atmel_mxt_ts"),
+	{ }
+};
+
+static const struct software_node asus_tf103c_touchscreen_node = {
+	.properties = asus_tf103c_touchscreen_props,
+};
+
+static const struct x86_i2c_client_info asus_tf103c_i2c_clients[] __initconst = {
+	{
+		/* bq24190 battery charger */
+		.board_info = {
+			.type = "bq24190",
+			.addr = 0x6b,
+			.dev_name = "bq24190",
+			.swnode = &bq24190_node,
+			.platform_data = &bq24190_pdata,
+		},
+		.adapter_path = "\\_SB_.I2C1",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_PMIC,
+			.chip = "\\_SB_.I2C7.PMIC",
+			.domain = DOMAIN_BUS_WAKEUP,
+			.index = 0,
+		},
+	}, {
+		/* ug3105 battery monitor */
+		.board_info = {
+			.type = "ug3105",
+			.addr = 0x70,
+			.dev_name = "ug3105",
+		},
+		.adapter_path = "\\_SB_.I2C1",
+	}, {
+		/* ak09911 compass */
+		.board_info = {
+			.type = "ak09911",
+			.addr = 0x0c,
+			.dev_name = "ak09911",
+		},
+		.adapter_path = "\\_SB_.I2C5",
+	}, {
+		/* kxtj21009 accel */
+		.board_info = {
+			.type = "kxtj21009",
+			.addr = 0x0f,
+			.dev_name = "kxtj21009",
+			.swnode = &asus_tf103c_accel_node,
+		},
+		.adapter_path = "\\_SB_.I2C5",
+	}, {
+		/* atmel touchscreen */
+		.board_info = {
+			.type = "atmel_mxt_ts",
+			.addr = 0x4a,
+			.dev_name = "atmel_mxt_ts",
+			.swnode = &asus_tf103c_touchscreen_node,
+		},
+		.adapter_path = "\\_SB_.I2C6",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_GPIOINT,
+			.chip = "INT33FC:02",
+			.index = 28,
+			.trigger = ACPI_EDGE_SENSITIVE,
+			.polarity = ACPI_ACTIVE_LOW,
+		},
+	},
+};
+
+static struct gpiod_lookup_table *asus_tf103c_gpios[] = {
+	&int3496_gpo2_pin22_gpios,
+	NULL
+};
+
+static const struct x86_dev_info asus_tf103c_info __initconst = {
+	.i2c_client_info = asus_tf103c_i2c_clients,
+	.i2c_client_count = ARRAY_SIZE(asus_tf103c_i2c_clients),
+	.pdev_info = int3496_pdevs,
+	.pdev_count = ARRAY_SIZE(int3496_pdevs),
+	.gpiod_lookup_tables = asus_tf103c_gpios,
+	.modules = bq24190_modules,
+};
+
 /*
  * When booted with the BIOS set to Android mode the Chuwi Hi8 (CWI509) DSDT
  * contains a whole bunch of bogus ACPI I2C devices and is missing entries
@@ -268,6 +425,14 @@ static const struct x86_dev_info xiaomi_mipad2_info __initconst = {
 };
 
 static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
+	{
+		/* Asus TF103C */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
+		},
+		.driver_data = (void *)&asus_tf103c_info,
+	},
 	{
 		/* Chuwi Hi8 (CWI509) */
 		.matches = {

From f359c40bf872fc702efb9cf6aa8576613747580d Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:30 +0100
Subject: [PATCH 73/78] platform/x86: x86-android-tablets: Add Asus MeMO Pad 7
 ME176C data

Asus MeMO Pad 7 ME176C tablets have an Android factory img with everything
hardcoded in the kernel instead of properly described in the DSDT.

Add support for manually instantiating all the missing I2C devices by
adding the necessary device info to the x86-android-tablets module.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-12-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 1f4300e837c6..fb257b5811d3 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -209,6 +209,116 @@ static struct gpiod_lookup_table int3496_gpo2_pin22_gpios = {
 	},
 };
 
+/* Asus ME176C tablets have an Android factory img with everything hardcoded */
+static const char * const asus_me176c_accel_mount_matrix[] = {
+	"-1", "0", "0",
+	"0", "1", "0",
+	"0", "0", "1"
+};
+
+static const struct property_entry asus_me176c_accel_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", asus_me176c_accel_mount_matrix),
+	{ }
+};
+
+static const struct software_node asus_me176c_accel_node = {
+	.properties = asus_me176c_accel_props,
+};
+
+static const struct x86_i2c_client_info asus_me176c_i2c_clients[] __initconst = {
+	{
+		/* bq24190 battery charger */
+		.board_info = {
+			.type = "bq24190",
+			.addr = 0x6b,
+			.dev_name = "bq24190",
+			.swnode = &bq24190_node,
+			.platform_data = &bq24190_pdata,
+		},
+		.adapter_path = "\\_SB_.I2C1",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_PMIC,
+			.chip = "\\_SB_.I2C7.PMIC",
+			.domain = DOMAIN_BUS_WAKEUP,
+			.index = 0,
+		},
+	}, {
+		/* ug3105 battery monitor */
+		.board_info = {
+			.type = "ug3105",
+			.addr = 0x70,
+			.dev_name = "ug3105",
+		},
+		.adapter_path = "\\_SB_.I2C1",
+	}, {
+		/* ak09911 compass */
+		.board_info = {
+			.type = "ak09911",
+			.addr = 0x0c,
+			.dev_name = "ak09911",
+		},
+		.adapter_path = "\\_SB_.I2C5",
+	}, {
+		/* kxtj21009 accel */
+		.board_info = {
+			.type = "kxtj21009",
+			.addr = 0x0f,
+			.dev_name = "kxtj21009",
+			.swnode = &asus_me176c_accel_node,
+		},
+		.adapter_path = "\\_SB_.I2C5",
+	}, {
+		/* goodix touchscreen */
+		.board_info = {
+			.type = "GDIX1001:00",
+			.addr = 0x14,
+			.dev_name = "goodix_ts",
+		},
+		.adapter_path = "\\_SB_.I2C6",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_APIC,
+			.index = 0x45,
+			.trigger = ACPI_EDGE_SENSITIVE,
+			.polarity = ACPI_ACTIVE_LOW,
+		},
+	},
+};
+
+static const struct x86_serdev_info asus_me176c_serdevs[] __initconst = {
+	{
+		.ctrl_hid = "80860F0A",
+		.ctrl_uid = "2",
+		.ctrl_devname = "serial0",
+		.serdev_hid = "BCM2E3A",
+	},
+};
+
+static struct gpiod_lookup_table asus_me176c_goodix_gpios = {
+	.dev_id = "i2c-goodix_ts",
+	.table = {
+		GPIO_LOOKUP("INT33FC:00", 60, "reset", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("INT33FC:02", 28, "irq", GPIO_ACTIVE_HIGH),
+		{ }
+	},
+};
+
+static struct gpiod_lookup_table *asus_me176c_gpios[] = {
+	&int3496_gpo2_pin22_gpios,
+	&asus_me176c_goodix_gpios,
+	NULL
+};
+
+static const struct x86_dev_info asus_me176c_info __initconst = {
+	.i2c_client_info = asus_me176c_i2c_clients,
+	.i2c_client_count = ARRAY_SIZE(asus_me176c_i2c_clients),
+	.pdev_info = int3496_pdevs,
+	.pdev_count = ARRAY_SIZE(int3496_pdevs),
+	.serdev_info = asus_me176c_serdevs,
+	.serdev_count = ARRAY_SIZE(asus_me176c_serdevs),
+	.gpiod_lookup_tables = asus_me176c_gpios,
+	.modules = bq24190_modules,
+};
+
 /* Asus TF103C tablets have an Android factory img with everything hardcoded */
 static const char * const asus_tf103c_accel_mount_matrix[] = {
 	"0", "-1", "0",
@@ -425,6 +535,14 @@ static const struct x86_dev_info xiaomi_mipad2_info __initconst = {
 };
 
 static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
+	{
+		/* Asus MeMO Pad 7 ME176C */
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
+		},
+		.driver_data = (void *)&asus_me176c_info,
+	},
 	{
 		/* Asus TF103C */
 		.matches = {

From b40082d0b033486f8ee4eed5d38278b3164b0e8c Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 30 Dec 2021 00:14:31 +0100
Subject: [PATCH 74/78] platform/x86: x86-android-tablets: Add TM800A550L data

The whitelabel (sold as various brands) TM800A550L tablets's DSDT contains
a whole bunch of bogus ACPI I2C devices and the ACPI node describing
the touchscreen is bad (the IRQ is missing). Enumeration of these is
skipped through the acpi_quirk_skip_i2c_client_enumeration().

Add support for manually instantiating the (now) missing I2C devices by
adding the necessary device info to the x86-android-tablets module,
including instantiating an actually working i2c-client for
the touchscreen.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211229231431.437982-13-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 93 +++++++++++++++++++++-
 1 file changed, 92 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index fb257b5811d3..d39da5fca6c5 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -490,6 +490,86 @@ static const struct x86_dev_info chuwi_hi8_info __initconst = {
 	.i2c_client_count = ARRAY_SIZE(chuwi_hi8_i2c_clients),
 };
 
+/*
+ * Whitelabel (sold as various brands) TM800A550L tablets.
+ * These tablet's DSDT contains a whole bunch of bogus ACPI I2C devices
+ * (removed through acpi_quirk_skip_i2c_client_enumeration()) and
+ * the touchscreen fwnode has the wrong GPIOs.
+ */
+static const char * const whitelabel_tm800a550l_accel_mount_matrix[] = {
+	"-1", "0", "0",
+	"0", "1", "0",
+	"0", "0", "1"
+};
+
+static const struct property_entry whitelabel_tm800a550l_accel_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", whitelabel_tm800a550l_accel_mount_matrix),
+	{ }
+};
+
+static const struct software_node whitelabel_tm800a550l_accel_node = {
+	.properties = whitelabel_tm800a550l_accel_props,
+};
+
+static const struct property_entry whitelabel_tm800a550l_goodix_props[] = {
+	PROPERTY_ENTRY_STRING("firmware-name", "gt912-tm800a550l.fw"),
+	PROPERTY_ENTRY_STRING("goodix,config-name", "gt912-tm800a550l.cfg"),
+	PROPERTY_ENTRY_U32("goodix,main-clk", 54),
+	{ }
+};
+
+static const struct software_node whitelabel_tm800a550l_goodix_node = {
+	.properties = whitelabel_tm800a550l_goodix_props,
+};
+
+static const struct x86_i2c_client_info whitelabel_tm800a550l_i2c_clients[] __initconst = {
+	{
+		/* goodix touchscreen */
+		.board_info = {
+			.type = "GDIX1001:00",
+			.addr = 0x14,
+			.dev_name = "goodix_ts",
+			.swnode = &whitelabel_tm800a550l_goodix_node,
+		},
+		.adapter_path = "\\_SB_.I2C2",
+		.irq_data = {
+			.type = X86_ACPI_IRQ_TYPE_APIC,
+			.index = 0x44,
+			.trigger = ACPI_EDGE_SENSITIVE,
+			.polarity = ACPI_ACTIVE_HIGH,
+		},
+	}, {
+		/* kxcj91008 accel */
+		.board_info = {
+			.type = "kxcj91008",
+			.addr = 0x0f,
+			.dev_name = "kxcj91008",
+			.swnode = &whitelabel_tm800a550l_accel_node,
+		},
+		.adapter_path = "\\_SB_.I2C3",
+	},
+};
+
+static struct gpiod_lookup_table whitelabel_tm800a550l_goodix_gpios = {
+	.dev_id = "i2c-goodix_ts",
+	.table = {
+		GPIO_LOOKUP("INT33FC:01", 26, "reset", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("INT33FC:02", 3, "irq", GPIO_ACTIVE_HIGH),
+		{ }
+	},
+};
+
+static struct gpiod_lookup_table *whitelabel_tm800a550l_gpios[] = {
+	&whitelabel_tm800a550l_goodix_gpios,
+	NULL
+};
+
+static const struct x86_dev_info whitelabel_tm800a550l_info __initconst = {
+	.i2c_client_info = whitelabel_tm800a550l_i2c_clients,
+	.i2c_client_count = ARRAY_SIZE(whitelabel_tm800a550l_i2c_clients),
+	.gpiod_lookup_tables = whitelabel_tm800a550l_gpios,
+};
+
 /*
  * If the EFI bootloader is not Xiaomi's own signed Android loader, then the
  * Xiaomi Mi Pad 2 X86 tablet sets OSID in the DSDT to 1 (Windows), causing
@@ -560,7 +640,18 @@ static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "S806"),
 		},
 		.driver_data = (void *)&chuwi_hi8_info,
-	}, {
+	},
+	{
+		/* Whitelabel (sold as various brands) TM800A550L */
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
+			DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
+			/* Above strings are too generic, also match on BIOS version */
+			DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
+		},
+		.driver_data = (void *)&whitelabel_tm800a550l_info,
+	},
+	{
 		/* Xiaomi Mi Pad 2 */
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),

From 0a6509b0926dea5ebbd2c86551b7681b00585961 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 26 Dec 2021 15:18:49 +0100
Subject: [PATCH 75/78] platform/x86: Add Asus TF103C dock driver
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a driver for the keyboard, touchpad and USB port of
the keyboard dock for the Asus TF103C 2-in-1 tablet.

This keyboard dock has its own I2C attached embedded controller
and the keyboard and touchpad are also connected over I2C,
instead of using the usual USB connection. This means that the
keyboard dock requires this special driver to function.

Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: Ion Agorria <ion@agorria.com>
Cc: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211226141849.156407-1-hdegoede@redhat.com
---
 MAINTAINERS                             |   7 +
 drivers/platform/x86/Kconfig            |  19 +
 drivers/platform/x86/Makefile           |   1 +
 drivers/platform/x86/asus-tf103c-dock.c | 945 ++++++++++++++++++++++++
 4 files changed, 972 insertions(+)
 create mode 100644 drivers/platform/x86/asus-tf103c-dock.c

diff --git a/MAINTAINERS b/MAINTAINERS
index d7d063667af0..1dd2cbff0c6b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2988,6 +2988,13 @@ W:	http://acpi4asus.sf.net
 F:	drivers/platform/x86/asus*.c
 F:	drivers/platform/x86/eeepc*.c
 
+ASUS TF103C DOCK DRIVER
+M:	Hans de Goede <hdegoede@redhat.com>
+L:	platform-driver-x86@vger.kernel.org
+S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
+F:	drivers/platform/x86/asus-tf103c-dock.c
+
 ASUS WIRELESS RADIO CONTROL DRIVER
 M:	João Paulo Rechi Vita <jprvita@gmail.com>
 L:	platform-driver-x86@vger.kernel.org
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 833abec54644..c23612d98126 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -309,6 +309,25 @@ config ASUS_NB_WMI
 	  If you have an ACPI-WMI compatible Asus Notebook, say Y or M
 	  here.
 
+config ASUS_TF103C_DOCK
+	tristate "Asus TF103C 2-in-1 keyboard dock"
+	depends on ACPI
+	depends on I2C
+	depends on INPUT
+	depends on HID
+	depends on GPIOLIB
+	help
+	  This is a driver for the keyboard, touchpad and USB port of the
+	  keyboard dock for the Asus TF103C 2-in-1 tablet.
+
+	  This keyboard dock has its own I2C attached embedded controller
+	  and the keyboard and touchpad are also connected over I2C,
+	  instead of using the usual USB connection. This means that the
+	  keyboard dock requires this special driver to function.
+
+	  If you have an Asus TF103C tablet say Y or M here, for a generic x86
+	  distro config say M here.
+
 config MERAKI_MX100
 	tristate "Cisco Meraki MX100 Platform Driver"
 	depends on GPIOLIB
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index dce8a0e40e1b..c12a9b044fd8 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_ASUS_LAPTOP)	+= asus-laptop.o
 obj-$(CONFIG_ASUS_WIRELESS)	+= asus-wireless.o
 obj-$(CONFIG_ASUS_WMI)		+= asus-wmi.o
 obj-$(CONFIG_ASUS_NB_WMI)	+= asus-nb-wmi.o
+obj-$(CONFIG_ASUS_TF103C_DOCK)	+= asus-tf103c-dock.o
 obj-$(CONFIG_EEEPC_LAPTOP)	+= eeepc-laptop.o
 obj-$(CONFIG_EEEPC_WMI)		+= eeepc-wmi.o
 
diff --git a/drivers/platform/x86/asus-tf103c-dock.c b/drivers/platform/x86/asus-tf103c-dock.c
new file mode 100644
index 000000000000..d4ef8f362ee6
--- /dev/null
+++ b/drivers/platform/x86/asus-tf103c-dock.c
@@ -0,0 +1,945 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * This is a driver for the keyboard, touchpad and USB port of the
+ * keyboard dock for the Asus TF103C 2-in-1 tablet.
+ *
+ * This keyboard dock has its own I2C attached embedded controller
+ * and the keyboard and touchpad are also connected over I2C,
+ * instead of using the usual USB connection. This means that the
+ * keyboard dock requires this special driver to function.
+ *
+ * Copyright (C) 2021 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/dmi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/hid.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mod_devicetable.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/workqueue.h>
+#include <asm/unaligned.h>
+
+static bool fnlock;
+module_param(fnlock, bool, 0644);
+MODULE_PARM_DESC(fnlock,
+		 "By default the kbd toprow sends multimedia key presses. AltGr "
+		 "can be pressed to change this to F1-F12. Set this to 1 to "
+		 "change the default. Press AltGr + Esc to toggle at runtime.");
+
+#define TF103C_DOCK_DEV_NAME				"NPCE69A:00"
+
+#define TF103C_DOCK_HPD_DEBOUNCE			msecs_to_jiffies(20)
+
+/*** Touchpad I2C device defines ***/
+#define TF103C_DOCK_TP_ADDR				0x15
+
+/*** Keyboard I2C device defines **A*/
+#define TF103C_DOCK_KBD_ADDR				0x16
+
+#define TF103C_DOCK_KBD_DATA_REG			0x73
+#define TF103C_DOCK_KBD_DATA_MIN_LENGTH			4
+#define TF103C_DOCK_KBD_DATA_MAX_LENGTH			11
+#define TF103C_DOCK_KBD_DATA_MODIFIERS			3
+#define TF103C_DOCK_KBD_DATA_KEYS			5
+#define TF103C_DOCK_KBD_CMD_REG				0x75
+
+#define TF103C_DOCK_KBD_CMD_ENABLE			0x0800
+
+/*** EC innterrupt data I2C device defines ***/
+#define TF103C_DOCK_INTR_ADDR				0x19
+#define TF103C_DOCK_INTR_DATA_REG			0x6a
+
+#define TF103C_DOCK_INTR_DATA1_OBF_MASK			0x01
+#define TF103C_DOCK_INTR_DATA1_KEY_MASK			0x04
+#define TF103C_DOCK_INTR_DATA1_KBC_MASK			0x08
+#define TF103C_DOCK_INTR_DATA1_AUX_MASK			0x20
+#define TF103C_DOCK_INTR_DATA1_SCI_MASK			0x40
+#define TF103C_DOCK_INTR_DATA1_SMI_MASK			0x80
+/* Special values for the OOB data on kbd_client / tp_client */
+#define TF103C_DOCK_INTR_DATA1_OOB_VALUE		0xc1
+#define TF103C_DOCK_INTR_DATA2_OOB_VALUE		0x04
+
+#define TF103C_DOCK_SMI_AC_EVENT			0x31
+#define TF103C_DOCK_SMI_HANDSHAKING			0x50
+#define TF103C_DOCK_SMI_EC_WAKEUP			0x53
+#define TF103C_DOCK_SMI_BOOTBLOCK_RESET			0x5e
+#define TF103C_DOCK_SMI_WATCHDOG_RESET			0x5f
+#define TF103C_DOCK_SMI_ADAPTER_CHANGE			0x60
+#define TF103C_DOCK_SMI_DOCK_INSERT			0x61
+#define TF103C_DOCK_SMI_DOCK_REMOVE			0x62
+#define TF103C_DOCK_SMI_PAD_BL_CHANGE			0x63
+#define TF103C_DOCK_SMI_HID_STATUS_CHANGED		0x64
+#define TF103C_DOCK_SMI_HID_WAKEUP			0x65
+#define TF103C_DOCK_SMI_S3				0x83
+#define TF103C_DOCK_SMI_S5				0x85
+#define TF103C_DOCK_SMI_NOTIFY_SHUTDOWN			0x90
+#define TF103C_DOCK_SMI_RESUME				0x91
+
+/*** EC (dockram) I2C device defines ***/
+#define TF103C_DOCK_EC_ADDR				0x1b
+
+#define TF103C_DOCK_EC_CMD_REG				0x0a
+#define TF103C_DOCK_EC_CMD_LEN				9
+
+enum {
+	TF103C_DOCK_FLAG_HID_OPEN,
+};
+
+struct tf103c_dock_data {
+	struct delayed_work hpd_work;
+	struct irq_chip tp_irqchip;
+	struct irq_domain *tp_irq_domain;
+	struct i2c_client *ec_client;
+	struct i2c_client *intr_client;
+	struct i2c_client *kbd_client;
+	struct i2c_client *tp_client;
+	struct gpio_desc *pwr_en;
+	struct gpio_desc *irq_gpio;
+	struct gpio_desc *hpd_gpio;
+	struct input_dev *input;
+	struct hid_device *hid;
+	unsigned long flags;
+	int board_rev;
+	int irq;
+	int hpd_irq;
+	int tp_irq;
+	int last_press_0x13;
+	int last_press_0x14;
+	bool enabled;
+	bool tp_enabled;
+	bool altgr_pressed;
+	bool esc_pressed;
+	bool filter_esc;
+	u8 kbd_buf[TF103C_DOCK_KBD_DATA_MAX_LENGTH];
+};
+
+static struct gpiod_lookup_table tf103c_dock_gpios = {
+	.dev_id = "i2c-" TF103C_DOCK_DEV_NAME,
+	.table = {
+		GPIO_LOOKUP("INT33FC:00",      55, "dock_pwr_en", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("INT33FC:02",       1, "dock_irq", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("INT33FC:02",      29, "dock_hpd", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("gpio_crystalcove", 2, "board_rev", GPIO_ACTIVE_HIGH),
+		{}
+	},
+};
+
+/* Byte 0 is the length of the rest of the packet */
+static const u8 tf103c_dock_enable_cmd[9] = { 8, 0x20, 0, 0, 0, 0, 0x20, 0, 0 };
+static const u8 tf103c_dock_usb_enable_cmd[9] = { 8, 0, 0, 0, 0, 0, 0, 0x40, 0 };
+static const u8 tf103c_dock_suspend_cmd[9] = { 8, 0, 0x20, 0, 0, 0x22, 0, 0, 0 };
+
+/*** keyboard related code ***/
+
+static u8 tf103c_dock_kbd_hid_desc[] = {
+	0x05, 0x01,         /*  Usage Page (Desktop),               */
+	0x09, 0x06,         /*  Usage (Keyboard),                   */
+	0xA1, 0x01,         /*  Collection (Application),           */
+	0x85, 0x11,         /*      Report ID (17),                 */
+	0x95, 0x08,         /*      Report Count (8),               */
+	0x75, 0x01,         /*      Report Size (1),                */
+	0x15, 0x00,         /*      Logical Minimum (0),            */
+	0x25, 0x01,         /*      Logical Maximum (1),            */
+	0x05, 0x07,         /*      Usage Page (Keyboard),          */
+	0x19, 0xE0,         /*      Usage Minimum (KB Leftcontrol), */
+	0x29, 0xE7,         /*      Usage Maximum (KB Right GUI),   */
+	0x81, 0x02,         /*      Input (Variable),               */
+	0x95, 0x01,         /*      Report Count (1),               */
+	0x75, 0x08,         /*      Report Size (8),                */
+	0x81, 0x01,         /*      Input (Constant),               */
+	0x95, 0x06,         /*      Report Count (6),               */
+	0x75, 0x08,         /*      Report Size (8),                */
+	0x15, 0x00,         /*      Logical Minimum (0),            */
+	0x26, 0xFF, 0x00,   /*      Logical Maximum (255),          */
+	0x05, 0x07,         /*      Usage Page (Keyboard),          */
+	0x19, 0x00,         /*      Usage Minimum (None),           */
+	0x2A, 0xFF, 0x00,   /*      Usage Maximum (FFh),            */
+	0x81, 0x00,         /*      Input,                          */
+	0xC0                /*  End Collection                      */
+};
+
+static int tf103c_dock_kbd_read(struct tf103c_dock_data *dock)
+{
+	struct i2c_client *client = dock->kbd_client;
+	struct device *dev = &dock->ec_client->dev;
+	struct i2c_msg msgs[2];
+	u8 reg[2];
+	int ret;
+
+	reg[0] = TF103C_DOCK_KBD_DATA_REG & 0xff;
+	reg[1] = TF103C_DOCK_KBD_DATA_REG >> 8;
+
+	msgs[0].addr = client->addr;
+	msgs[0].flags = 0;
+	msgs[0].len = sizeof(reg);
+	msgs[0].buf = reg;
+
+	msgs[1].addr = client->addr;
+	msgs[1].flags = I2C_M_RD;
+	msgs[1].len = TF103C_DOCK_KBD_DATA_MAX_LENGTH;
+	msgs[1].buf = dock->kbd_buf;
+
+	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (ret != ARRAY_SIZE(msgs)) {
+		dev_err(dev, "error %d reading kbd data\n", ret);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void tf103c_dock_kbd_write(struct tf103c_dock_data *dock, u16 cmd)
+{
+	struct device *dev = &dock->ec_client->dev;
+	u8 buf[4];
+	int ret;
+
+	put_unaligned_le16(TF103C_DOCK_KBD_CMD_REG, &buf[0]);
+	put_unaligned_le16(cmd, &buf[2]);
+
+	ret = i2c_master_send(dock->kbd_client, buf, sizeof(buf));
+	if (ret != sizeof(buf))
+		dev_err(dev, "error %d writing kbd cmd\n", ret);
+}
+
+/* HID ll_driver functions for forwarding input-reports from the kbd_client */
+static int tf103c_dock_hid_parse(struct hid_device *hid)
+{
+	return hid_parse_report(hid, tf103c_dock_kbd_hid_desc,
+				sizeof(tf103c_dock_kbd_hid_desc));
+}
+
+static int tf103c_dock_hid_start(struct hid_device *hid)
+{
+	return 0;
+}
+
+static void tf103c_dock_hid_stop(struct hid_device *hid)
+{
+	hid->claimed = 0;
+}
+
+static int tf103c_dock_hid_open(struct hid_device *hid)
+{
+	struct tf103c_dock_data *dock = hid->driver_data;
+
+	set_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags);
+	return 0;
+}
+
+static void tf103c_dock_hid_close(struct hid_device *hid)
+{
+	struct tf103c_dock_data *dock = hid->driver_data;
+
+	clear_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags);
+}
+
+/* Mandatory, but not used */
+static int tf103c_dock_hid_raw_request(struct hid_device *hid, u8 reportnum,
+				       u8 *buf, size_t len, u8 rtype, int reqtype)
+{
+	return 0;
+}
+
+struct hid_ll_driver tf103c_dock_hid_ll_driver = {
+	.parse = tf103c_dock_hid_parse,
+	.start = tf103c_dock_hid_start,
+	.stop = tf103c_dock_hid_stop,
+	.open = tf103c_dock_hid_open,
+	.close = tf103c_dock_hid_close,
+	.raw_request = tf103c_dock_hid_raw_request,
+};
+
+static int tf103c_dock_toprow_codes[13][2] = {
+	/* Normal,            AltGr pressed */
+	{ KEY_POWER,          KEY_F1 },
+	{ KEY_RFKILL,         KEY_F2 },
+	{ KEY_F21,            KEY_F3 }, /* Touchpad toggle, userspace expects F21 */
+	{ KEY_BRIGHTNESSDOWN, KEY_F4 },
+	{ KEY_BRIGHTNESSUP,   KEY_F5 },
+	{ KEY_CAMERA,         KEY_F6 },
+	{ KEY_CONFIG,         KEY_F7 },
+	{ KEY_PREVIOUSSONG,   KEY_F8 },
+	{ KEY_PLAYPAUSE,      KEY_F9 },
+	{ KEY_NEXTSONG,       KEY_F10 },
+	{ KEY_MUTE,           KEY_F11 },
+	{ KEY_VOLUMEDOWN,     KEY_F12 },
+	{ KEY_VOLUMEUP,       KEY_SYSRQ },
+};
+
+static void tf103c_dock_report_toprow_kbd_hook(struct tf103c_dock_data *dock)
+{
+	u8 *esc, *buf = dock->kbd_buf;
+	int size;
+
+	/*
+	 * Stop AltGr reports from getting reported on the "Asus TF103C Dock
+	 * Keyboard" input_dev, since this gets used as "Fn" key for the toprow
+	 * keys. Instead we report this on the "Asus TF103C Dock Top Row Keys"
+	 * input_dev, when not used to modify the toprow keys.
+	 */
+	dock->altgr_pressed = buf[TF103C_DOCK_KBD_DATA_MODIFIERS] & 0x40;
+	buf[TF103C_DOCK_KBD_DATA_MODIFIERS] &= ~0x40;
+
+	input_report_key(dock->input, KEY_RIGHTALT, dock->altgr_pressed);
+	input_sync(dock->input);
+
+	/* Toggle fnlock on AltGr + Esc press */
+	buf = buf + TF103C_DOCK_KBD_DATA_KEYS;
+	size = TF103C_DOCK_KBD_DATA_MAX_LENGTH - TF103C_DOCK_KBD_DATA_KEYS;
+	esc = memchr(buf, 0x29, size);
+	if (!dock->esc_pressed && esc) {
+		if (dock->altgr_pressed) {
+			fnlock = !fnlock;
+			dock->filter_esc = true;
+		}
+	}
+	if (esc && dock->filter_esc)
+		*esc = 0;
+	else
+		dock->filter_esc = false;
+
+	dock->esc_pressed = esc != NULL;
+}
+
+static void tf103c_dock_toprow_press(struct tf103c_dock_data *dock, int key_code)
+{
+	/*
+	 * Release AltGr before reporting the toprow key, so that userspace
+	 * sees e.g. just KEY_SUSPEND and not AltGr + KEY_SUSPEND.
+	 */
+	if (dock->altgr_pressed) {
+		input_report_key(dock->input, KEY_RIGHTALT, false);
+		input_sync(dock->input);
+	}
+
+	input_report_key(dock->input, key_code, true);
+	input_sync(dock->input);
+}
+
+static void tf103c_dock_toprow_release(struct tf103c_dock_data *dock, int key_code)
+{
+	input_report_key(dock->input, key_code, false);
+	input_sync(dock->input);
+
+	if (dock->altgr_pressed) {
+		input_report_key(dock->input, KEY_RIGHTALT, true);
+		input_sync(dock->input);
+	}
+}
+
+static void tf103c_dock_toprow_event(struct tf103c_dock_data *dock,
+					    int toprow_index, int *last_press)
+{
+	int key_code, fn = dock->altgr_pressed ^ fnlock;
+
+	if (last_press && *last_press) {
+		tf103c_dock_toprow_release(dock, *last_press);
+		*last_press = 0;
+	}
+
+	if (toprow_index < 0)
+		return;
+
+	key_code = tf103c_dock_toprow_codes[toprow_index][fn];
+	tf103c_dock_toprow_press(dock, key_code);
+
+	if (last_press)
+		*last_press = key_code;
+	else
+		tf103c_dock_toprow_release(dock, key_code);
+}
+
+/*
+ * The keyboard sends what appears to be standard I2C-HID input-reports,
+ * except that a 16 bit register address of where the I2C-HID format
+ * input-reports are stored must be send before reading it in a single
+ * (I2C repeated-start) I2C transaction.
+ *
+ * Its unknown how to get the HID descriptors but they are easy to reconstruct:
+ *
+ * Input report id 0x11 is 8 bytes long and contain standard USB HID intf-class,
+ * Boot Interface Subclass reports.
+ * Input report id 0x13 is 2 bytes long and sends Consumer Control events
+ * Input report id 0x14 is 1 byte long and sends System Control events
+ *
+ * However the top row keys (where a normal keyboard has F1-F12 + Print-Screen)
+ * are a mess, using a mix of the 0x13 and 0x14 input reports as well as EC SCI
+ * events; and these need special handling to allow actually sending F1-F12,
+ * since the Fn key on the keyboard only works on the cursor keys and the top
+ * row keys always send their special "Multimedia hotkey" codes.
+ *
+ * So only forward the 0x11 reports to HID and handle the top-row keys here.
+ */
+static void tf103c_dock_kbd_interrupt(struct tf103c_dock_data *dock)
+{
+	struct device *dev = &dock->ec_client->dev;
+	u8 *buf = dock->kbd_buf;
+	int size;
+
+	if (tf103c_dock_kbd_read(dock))
+		return;
+
+	size = buf[0] | buf[1] << 8;
+	if (size < TF103C_DOCK_KBD_DATA_MIN_LENGTH ||
+	    size > TF103C_DOCK_KBD_DATA_MAX_LENGTH) {
+		dev_err(dev, "error reported kbd pkt size %d is out of range %d-%d\n", size,
+			TF103C_DOCK_KBD_DATA_MIN_LENGTH,
+			TF103C_DOCK_KBD_DATA_MAX_LENGTH);
+		return;
+	}
+
+	switch (buf[2]) {
+	case 0x11:
+		if (size != 11)
+			break;
+
+		tf103c_dock_report_toprow_kbd_hook(dock);
+
+		if (test_bit(TF103C_DOCK_FLAG_HID_OPEN, &dock->flags))
+			hid_input_report(dock->hid, HID_INPUT_REPORT, buf + 2, size - 2, 1);
+		return;
+	case 0x13:
+		if (size != 5)
+			break;
+
+		switch (buf[3] | buf[4] << 8) {
+		case 0:
+			tf103c_dock_toprow_event(dock, -1, &dock->last_press_0x13);
+			return;
+		case 0x70:
+			tf103c_dock_toprow_event(dock, 3, &dock->last_press_0x13);
+			return;
+		case 0x6f:
+			tf103c_dock_toprow_event(dock, 4, &dock->last_press_0x13);
+			return;
+		case 0xb6:
+			tf103c_dock_toprow_event(dock, 7, &dock->last_press_0x13);
+			return;
+		case 0xcd:
+			tf103c_dock_toprow_event(dock, 8, &dock->last_press_0x13);
+			return;
+		case 0xb5:
+			tf103c_dock_toprow_event(dock, 9, &dock->last_press_0x13);
+			return;
+		case 0xe2:
+			tf103c_dock_toprow_event(dock, 10, &dock->last_press_0x13);
+			return;
+		case 0xea:
+			tf103c_dock_toprow_event(dock, 11, &dock->last_press_0x13);
+			return;
+		case 0xe9:
+			tf103c_dock_toprow_event(dock, 12, &dock->last_press_0x13);
+			return;
+		}
+		break;
+	case 0x14:
+		if (size != 4)
+			break;
+
+		switch (buf[3]) {
+		case 0:
+			tf103c_dock_toprow_event(dock, -1, &dock->last_press_0x14);
+			return;
+		case 1:
+			tf103c_dock_toprow_event(dock, 0, &dock->last_press_0x14);
+			return;
+		}
+		break;
+	}
+
+	dev_warn(dev, "warning unknown kbd data: %*ph\n", size, buf);
+}
+
+/*** touchpad related code ***/
+
+static const struct property_entry tf103c_dock_touchpad_props[] = {
+	PROPERTY_ENTRY_BOOL("elan,clickpad"),
+	{ }
+};
+
+static const struct software_node tf103c_dock_touchpad_sw_node = {
+	.properties = tf103c_dock_touchpad_props,
+};
+
+/*
+ * tf103c_enable_touchpad() is only called from the threaded interrupt handler
+ * and tf103c_disable_touchpad() is only called after the irq is disabled,
+ * so no locking is necessary.
+ */
+static void tf103c_dock_enable_touchpad(struct tf103c_dock_data *dock)
+{
+	struct i2c_board_info board_info = { };
+	struct device *dev = &dock->ec_client->dev;
+	int ret;
+
+	if (dock->tp_enabled) {
+		/* Happens after resume, the tp needs to be reinitialized */
+		ret = device_reprobe(&dock->tp_client->dev);
+		if (ret)
+			dev_err_probe(dev, ret, "reprobing tp-client\n");
+		return;
+	}
+
+	strscpy(board_info.type, "elan_i2c", I2C_NAME_SIZE);
+	board_info.addr = TF103C_DOCK_TP_ADDR;
+	board_info.dev_name = TF103C_DOCK_DEV_NAME "-tp";
+	board_info.irq = dock->tp_irq;
+	board_info.swnode = &tf103c_dock_touchpad_sw_node;
+
+	dock->tp_client = i2c_new_client_device(dock->ec_client->adapter, &board_info);
+	if (IS_ERR(dock->tp_client)) {
+		dev_err(dev, "error %ld creating tp client\n", PTR_ERR(dock->tp_client));
+		return;
+	}
+
+	dock->tp_enabled = true;
+}
+
+static void tf103c_dock_disable_touchpad(struct tf103c_dock_data *dock)
+{
+	if (!dock->tp_enabled)
+		return;
+
+	i2c_unregister_device(dock->tp_client);
+
+	dock->tp_enabled = false;
+}
+
+/*** interrupt handling code ***/
+static void tf103c_dock_ec_cmd(struct tf103c_dock_data *dock, const u8 *cmd)
+{
+	struct device *dev = &dock->ec_client->dev;
+	int ret;
+
+	ret = i2c_smbus_write_i2c_block_data(dock->ec_client, TF103C_DOCK_EC_CMD_REG,
+					     TF103C_DOCK_EC_CMD_LEN, cmd);
+	if (ret)
+		dev_err(dev, "error %d sending %*ph cmd\n", ret,
+			TF103C_DOCK_EC_CMD_LEN, cmd);
+}
+
+static void tf103c_dock_sci(struct tf103c_dock_data *dock, u8 val)
+{
+	struct device *dev = &dock->ec_client->dev;
+
+	switch (val) {
+	case 2:
+		tf103c_dock_toprow_event(dock, 1, NULL);
+		return;
+	case 4:
+		tf103c_dock_toprow_event(dock, 2, NULL);
+		return;
+	case 8:
+		tf103c_dock_toprow_event(dock, 5, NULL);
+		return;
+	case 17:
+		tf103c_dock_toprow_event(dock, 6, NULL);
+		return;
+	}
+
+	dev_warn(dev, "warning unknown SCI value: 0x%02x\n", val);
+}
+
+static void tf103c_dock_smi(struct tf103c_dock_data *dock, u8 val)
+{
+	struct device *dev = &dock->ec_client->dev;
+
+	switch (val) {
+	case TF103C_DOCK_SMI_EC_WAKEUP:
+		tf103c_dock_ec_cmd(dock, tf103c_dock_enable_cmd);
+		tf103c_dock_ec_cmd(dock, tf103c_dock_usb_enable_cmd);
+		tf103c_dock_kbd_write(dock, TF103C_DOCK_KBD_CMD_ENABLE);
+		break;
+	case TF103C_DOCK_SMI_PAD_BL_CHANGE:
+		/* There is no backlight, but the EC still sends this */
+		break;
+	case TF103C_DOCK_SMI_HID_STATUS_CHANGED:
+		tf103c_dock_enable_touchpad(dock);
+		break;
+	default:
+		dev_warn(dev, "warning unknown SMI value: 0x%02x\n", val);
+		break;
+	}
+}
+
+static irqreturn_t tf103c_dock_irq(int irq, void *data)
+{
+	struct tf103c_dock_data *dock = data;
+	struct device *dev = &dock->ec_client->dev;
+	u8 intr_data[8];
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(dock->intr_client, TF103C_DOCK_INTR_DATA_REG,
+					    sizeof(intr_data), intr_data);
+	if (ret != sizeof(intr_data)) {
+		dev_err(dev, "error %d reading intr data\n", ret);
+		return IRQ_NONE;
+	}
+
+	if (!(intr_data[1] & TF103C_DOCK_INTR_DATA1_OBF_MASK))
+		return IRQ_NONE;
+
+	/* intr_data[0] is the length of the rest of the packet */
+	if (intr_data[0] == 3 && intr_data[1] == TF103C_DOCK_INTR_DATA1_OOB_VALUE &&
+				 intr_data[2] == TF103C_DOCK_INTR_DATA2_OOB_VALUE) {
+		/* intr_data[3] seems to contain a HID input report id */
+		switch (intr_data[3]) {
+		case 0x01:
+			handle_nested_irq(dock->tp_irq);
+			break;
+		case 0x11:
+		case 0x13:
+		case 0x14:
+			tf103c_dock_kbd_interrupt(dock);
+			break;
+		default:
+			dev_warn(dev, "warning unknown intr_data[3]: 0x%02x\n", intr_data[3]);
+			break;
+		}
+		return IRQ_HANDLED;
+	}
+
+	if (intr_data[1] & TF103C_DOCK_INTR_DATA1_SCI_MASK) {
+		tf103c_dock_sci(dock, intr_data[2]);
+		return IRQ_HANDLED;
+	}
+
+	if (intr_data[1] & TF103C_DOCK_INTR_DATA1_SMI_MASK) {
+		tf103c_dock_smi(dock, intr_data[2]);
+		return IRQ_HANDLED;
+	}
+
+	dev_warn(dev, "warning unknown intr data: %*ph\n", 8, intr_data);
+	return IRQ_NONE;
+}
+
+/*
+ * tf103c_dock_[dis|en]able only run from hpd_work or at times when
+ * hpd_work cannot run (hpd_irq disabled), so no locking is necessary.
+ */
+static void tf103c_dock_enable(struct tf103c_dock_data *dock)
+{
+	if (dock->enabled)
+		return;
+
+	if (dock->board_rev != 2)
+		gpiod_set_value(dock->pwr_en, 1);
+
+	msleep(500);
+	enable_irq(dock->irq);
+
+	dock->enabled = true;
+}
+
+static void tf103c_dock_disable(struct tf103c_dock_data *dock)
+{
+	if (!dock->enabled)
+		return;
+
+	disable_irq(dock->irq);
+	tf103c_dock_disable_touchpad(dock);
+	if (dock->board_rev != 2)
+		gpiod_set_value(dock->pwr_en, 0);
+
+	dock->enabled = false;
+}
+
+static void tf103c_dock_hpd_work(struct work_struct *work)
+{
+	struct tf103c_dock_data *dock =
+		container_of(work, struct tf103c_dock_data, hpd_work.work);
+
+	if (gpiod_get_value(dock->hpd_gpio))
+		tf103c_dock_enable(dock);
+	else
+		tf103c_dock_disable(dock);
+}
+
+static irqreturn_t tf103c_dock_hpd_irq(int irq, void *data)
+{
+	struct tf103c_dock_data *dock = data;
+
+	mod_delayed_work(system_long_wq, &dock->hpd_work, TF103C_DOCK_HPD_DEBOUNCE);
+	return IRQ_HANDLED;
+}
+
+static void tf103c_dock_start_hpd(struct tf103c_dock_data *dock)
+{
+	enable_irq(dock->hpd_irq);
+	/* Sync current HPD status */
+	queue_delayed_work(system_long_wq, &dock->hpd_work, TF103C_DOCK_HPD_DEBOUNCE);
+}
+
+static void tf103c_dock_stop_hpd(struct tf103c_dock_data *dock)
+{
+	disable_irq(dock->hpd_irq);
+	cancel_delayed_work_sync(&dock->hpd_work);
+}
+
+/*** probe ***/
+
+static const struct dmi_system_id tf103c_dock_dmi_ids[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
+		},
+	},
+	{ }
+};
+
+static void tf103c_dock_non_devm_cleanup(void *data)
+{
+	struct tf103c_dock_data *dock = data;
+
+	if (dock->tp_irq_domain)
+		irq_domain_remove(dock->tp_irq_domain);
+
+	if (!IS_ERR_OR_NULL(dock->hid))
+		hid_destroy_device(dock->hid);
+
+	i2c_unregister_device(dock->kbd_client);
+	i2c_unregister_device(dock->intr_client);
+	gpiod_remove_lookup_table(&tf103c_dock_gpios);
+}
+
+static int tf103c_dock_probe(struct i2c_client *client)
+{
+	struct i2c_board_info board_info = { };
+	struct device *dev = &client->dev;
+	struct gpio_desc *board_rev_gpio;
+	struct tf103c_dock_data *dock;
+	enum gpiod_flags flags;
+	int i, ret;
+
+	/* GPIOs are hardcoded for the Asus TF103C, don't bind on other devs */
+	if (!dmi_check_system(tf103c_dock_dmi_ids))
+		return -ENODEV;
+
+	dock = devm_kzalloc(dev, sizeof(*dock), GFP_KERNEL);
+	if (!dock)
+		return -ENOMEM;
+
+	INIT_DELAYED_WORK(&dock->hpd_work, tf103c_dock_hpd_work);
+
+	/* 1. Get GPIOs and their IRQs */
+	gpiod_add_lookup_table(&tf103c_dock_gpios);
+
+	ret = devm_add_action_or_reset(dev, tf103c_dock_non_devm_cleanup, dock);
+	if (ret)
+		return ret;
+
+	/*
+	 * The pin is configured as input by default, use ASIS because otherwise
+	 * the gpio-crystalcove.c switches off the internal pull-down replacing
+	 * it with a pull-up.
+	 */
+	board_rev_gpio = gpiod_get(dev, "board_rev", GPIOD_ASIS);
+	if (IS_ERR(board_rev_gpio))
+		return dev_err_probe(dev, PTR_ERR(board_rev_gpio), "requesting board_rev GPIO\n");
+	dock->board_rev = gpiod_get_value_cansleep(board_rev_gpio) + 1;
+	gpiod_put(board_rev_gpio);
+
+	/*
+	 * The Android driver drives the dock-pwr-en pin high at probe for
+	 * revision 2 boards and then never touches it again?
+	 * This code has only been tested on a revision 1 board, so for now
+	 * just mimick what Android does on revision 2 boards.
+	 */
+	flags = (dock->board_rev == 2) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
+	dock->pwr_en = devm_gpiod_get(dev, "dock_pwr_en", flags);
+	if (IS_ERR(dock->pwr_en))
+		return dev_err_probe(dev, PTR_ERR(dock->pwr_en), "requesting pwr_en GPIO\n");
+
+	dock->irq_gpio = devm_gpiod_get(dev, "dock_irq", GPIOD_IN);
+	if (IS_ERR(dock->irq_gpio))
+		return dev_err_probe(dev, PTR_ERR(dock->irq_gpio), "requesting IRQ GPIO\n");
+
+	dock->irq = gpiod_to_irq(dock->irq_gpio);
+	if (dock->irq < 0)
+		return dev_err_probe(dev, dock->irq, "getting dock IRQ");
+
+	ret = devm_request_threaded_irq(dev, dock->irq, NULL, tf103c_dock_irq,
+					IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					"dock_irq", dock);
+	if (ret)
+		return dev_err_probe(dev, ret, "requesting dock IRQ");
+
+	dock->hpd_gpio = devm_gpiod_get(dev, "dock_hpd", GPIOD_IN);
+	if (IS_ERR(dock->hpd_gpio))
+		return dev_err_probe(dev, PTR_ERR(dock->hpd_gpio), "requesting HPD GPIO\n");
+
+	dock->hpd_irq = gpiod_to_irq(dock->hpd_gpio);
+	if (dock->hpd_irq < 0)
+		return dev_err_probe(dev, dock->hpd_irq, "getting HPD IRQ");
+
+	ret = devm_request_irq(dev, dock->hpd_irq, tf103c_dock_hpd_irq,
+			       IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN,
+			       "dock_hpd", dock);
+	if (ret)
+		return ret;
+
+	/*
+	 * 2. Create I2C clients. The dock uses 4 different i2c addresses,
+	 * the ACPI NPCE69A node being probed points to the EC address.
+	 */
+	dock->ec_client = client;
+
+	strscpy(board_info.type, "tf103c-dock-intr", I2C_NAME_SIZE);
+	board_info.addr = TF103C_DOCK_INTR_ADDR;
+	board_info.dev_name = TF103C_DOCK_DEV_NAME "-intr";
+
+	dock->intr_client = i2c_new_client_device(client->adapter, &board_info);
+	if (IS_ERR(dock->intr_client))
+		return dev_err_probe(dev, PTR_ERR(dock->intr_client), "creating intr client\n");
+
+	strscpy(board_info.type, "tf103c-dock-kbd", I2C_NAME_SIZE);
+	board_info.addr = TF103C_DOCK_KBD_ADDR;
+	board_info.dev_name = TF103C_DOCK_DEV_NAME "-kbd";
+
+	dock->kbd_client = i2c_new_client_device(client->adapter, &board_info);
+	if (IS_ERR(dock->kbd_client))
+		return dev_err_probe(dev, PTR_ERR(dock->kbd_client), "creating kbd client\n");
+
+	/* 3. Create input_dev for the top row of the keyboard */
+	dock->input = devm_input_allocate_device(dev);
+	if (!dock->input)
+		return -ENOMEM;
+
+	dock->input->name = "Asus TF103C Dock Top Row Keys";
+	dock->input->phys = dev_name(dev);
+	dock->input->dev.parent = dev;
+	dock->input->id.bustype = BUS_I2C;
+	dock->input->id.vendor = /* USB_VENDOR_ID_ASUSTEK */
+	dock->input->id.product = /* From TF-103-C */
+	dock->input->id.version = 0x0100;  /* 1.0 */
+
+	for (i = 0; i < ARRAY_SIZE(tf103c_dock_toprow_codes); i++) {
+		input_set_capability(dock->input, EV_KEY, tf103c_dock_toprow_codes[i][0]);
+		input_set_capability(dock->input, EV_KEY, tf103c_dock_toprow_codes[i][1]);
+	}
+	input_set_capability(dock->input, EV_KEY, KEY_RIGHTALT);
+
+	ret = input_register_device(dock->input);
+	if (ret)
+		return ret;
+
+	/* 4. Create HID device for the keyboard */
+	dock->hid = hid_allocate_device();
+	if (IS_ERR(dock->hid))
+		return dev_err_probe(dev, PTR_ERR(dock->hid), "allocating hid dev\n");
+
+	dock->hid->driver_data = dock;
+	dock->hid->ll_driver = &tf103c_dock_hid_ll_driver;
+	dock->hid->dev.parent = &client->dev;
+	dock->hid->bus = BUS_I2C;
+	dock->hid->vendor = 0x0b05;  /* USB_VENDOR_ID_ASUSTEK */
+	dock->hid->product = 0x0103; /* From TF-103-C */
+	dock->hid->version = 0x0100; /* 1.0 */
+	strscpy(dock->hid->name, "Asus TF103C Dock Keyboard", sizeof(dock->hid->name));
+	strscpy(dock->hid->phys, dev_name(dev), sizeof(dock->hid->phys));
+
+	ret = hid_add_device(dock->hid);
+	if (ret)
+		return dev_err_probe(dev, ret, "adding hid dev\n");
+
+	/* 5. Setup irqchip for touchpad IRQ pass-through */
+	dock->tp_irqchip.name = KBUILD_MODNAME;
+
+	dock->tp_irq_domain = irq_domain_add_linear(NULL, 1, &irq_domain_simple_ops, NULL);
+	if (!dock->tp_irq_domain)
+		return -ENOMEM;
+
+	dock->tp_irq = irq_create_mapping(dock->tp_irq_domain, 0);
+	if (!dock->tp_irq)
+		return -ENOMEM;
+
+	irq_set_chip_data(dock->tp_irq, dock);
+	irq_set_chip_and_handler(dock->tp_irq, &dock->tp_irqchip, handle_simple_irq);
+	irq_set_nested_thread(dock->tp_irq, true);
+	irq_set_noprobe(dock->tp_irq);
+
+	dev_info(dev, "Asus TF103C board-revision: %d\n", dock->board_rev);
+
+	tf103c_dock_start_hpd(dock);
+
+	device_init_wakeup(dev, true);
+	i2c_set_clientdata(client, dock);
+	return 0;
+}
+
+static int tf103c_dock_remove(struct i2c_client *client)
+{
+	struct tf103c_dock_data *dock = i2c_get_clientdata(client);
+
+	tf103c_dock_stop_hpd(dock);
+	tf103c_dock_disable(dock);
+
+	return 0;
+}
+
+static int __maybe_unused tf103c_dock_suspend(struct device *dev)
+{
+	struct tf103c_dock_data *dock = dev_get_drvdata(dev);
+
+	tf103c_dock_stop_hpd(dock);
+
+	if (dock->enabled) {
+		tf103c_dock_ec_cmd(dock, tf103c_dock_suspend_cmd);
+
+		if (device_may_wakeup(dev))
+			enable_irq_wake(dock->irq);
+	}
+
+	return 0;
+}
+
+static int __maybe_unused tf103c_dock_resume(struct device *dev)
+{
+	struct tf103c_dock_data *dock = dev_get_drvdata(dev);
+
+	if (dock->enabled) {
+		if (device_may_wakeup(dev))
+			disable_irq_wake(dock->irq);
+
+		/* Don't try to resume if the dock was unplugged during suspend */
+		if (gpiod_get_value(dock->hpd_gpio))
+			tf103c_dock_ec_cmd(dock, tf103c_dock_enable_cmd);
+	}
+
+	tf103c_dock_start_hpd(dock);
+	return 0;
+}
+
+SIMPLE_DEV_PM_OPS(tf103c_dock_pm_ops, tf103c_dock_suspend, tf103c_dock_resume);
+
+static const struct acpi_device_id tf103c_dock_acpi_match[] = {
+	{"NPCE69A"},
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, tf103c_dock_acpi_match);
+
+static struct i2c_driver tf103c_dock_driver = {
+	.driver = {
+		.name = "asus-tf103c-dock",
+		.pm = &tf103c_dock_pm_ops,
+		.acpi_match_table = tf103c_dock_acpi_match,
+	},
+	.probe_new = tf103c_dock_probe,
+	.remove	= tf103c_dock_remove,
+};
+module_i2c_driver(tf103c_dock_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com");
+MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver");
+MODULE_LICENSE("GPL");

From 62ac88a7b4619627ad2fc87f9910d63664805e85 Mon Sep 17 00:00:00 2001
From: Daniel Scally <djrscally@gmail.com>
Date: Thu, 6 Jan 2022 23:20:45 +0000
Subject: [PATCH 76/78] platform/x86: int3472: Add board data for Surface Go 3

The Surface Go 3 needs some board data in order to configure the
TPS68470 PMIC - add entries to the tables in tps68470_board_data.c
that define the configuration that's needed.

Signed-off-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20220106232045.41291-1-djrscally@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 .../x86/intel/int3472/tps68470_board_data.c         | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/platform/x86/intel/int3472/tps68470_board_data.c b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
index faa5570f6e6b..f93d437fd192 100644
--- a/drivers/platform/x86/intel/int3472/tps68470_board_data.c
+++ b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
@@ -110,6 +110,12 @@ static const struct int3472_tps68470_board_data surface_go_tps68470_board_data =
 	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
 };
 
+static const struct int3472_tps68470_board_data surface_go3_tps68470_board_data = {
+	.dev_name = "i2c-INT3472:01",
+	.tps68470_gpio_lookup_table = &surface_go_tps68470_gpios,
+	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
+};
+
 static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 	{
 		.matches = {
@@ -125,6 +131,13 @@ static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
 		},
 		.driver_data = (void *)&surface_go_tps68470_board_data,
 	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
+		},
+		.driver_data = (void *)&surface_go3_tps68470_board_data,
+	},
 	{ }
 };
 

From 02fb09459435add44bb00191ce9b040c6b4f3aae Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 8 Jan 2022 16:49:47 +0100
Subject: [PATCH 77/78] platform/x86: x86-android-tablets: Fix GPIO lookup leak
 on error-exit

Fix leaking the registered gpiod_lookup tables when the kcalloc() for the
i2c_clients array fails.

Fixes: ef2ac11493e2 ("platform/x86: x86-android-tablets: Add support for registering GPIO lookup tables")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220108154947.136593-1-hdegoede@redhat.com
---
 drivers/platform/x86/x86-android-tablets.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index d39da5fca6c5..3ba63ad91b28 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -815,8 +815,10 @@ static __init int x86_android_tablet_init(void)
 		gpiod_add_lookup_table(gpiod_lookup_tables[i]);
 
 	i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
-	if (!i2c_clients)
+	if (!i2c_clients) {
+		x86_android_tablet_cleanup();
 		return -ENOMEM;
+	}
 
 	i2c_client_count = dev_info->i2c_client_count;
 	for (i = 0; i < i2c_client_count; i++) {

From 3367d1bd738c01b2737eaab7d922bfe5f1a41f38 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Sat, 8 Jan 2022 16:31:58 +0100
Subject: [PATCH 78/78] power: supply: Provide stubs for charge_behaviour
 helpers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When CONFIG_SYSFS is not enabled provide stubs for the helper functions
to not break their callers.

Fixes: 539b9c94ac83 ("power: supply: add helpers for charge_behaviour sysfs")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20220108153158.189489-1-linux@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 include/linux/power_supply.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 71f0379c2af8..f6b9ed4630fa 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -553,6 +553,21 @@ ssize_t power_supply_charge_behaviour_show(struct device *dev,
 					   char *buf);
 
 int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf);
+#else
+static inline
+ssize_t power_supply_charge_behaviour_show(struct device *dev,
+					   unsigned int available_behaviours,
+					   enum power_supply_charge_behaviour behaviour,
+					   char *buf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int power_supply_charge_behaviour_parse(unsigned int available_behaviours,
+						      const char *buf)
+{
+	return -EOPNOTSUPP;
+}
 #endif
 
 #endif /* __LINUX_POWER_SUPPLY_H__ */