254 lines
6.5 KiB
C
254 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* dptf_power: DPTF platform power driver
|
|
* Copyright (c) 2016, Intel Corporation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
/*
|
|
* Presentation of attributes which are defined for INT3407 and INT3532.
|
|
* They are:
|
|
* PMAX : Maximum platform powe
|
|
* PSRC : Platform power source
|
|
* ARTG : Adapter rating
|
|
* CTYP : Charger type
|
|
* PBSS : Battery steady power
|
|
* PROP : Rest of worst case platform Power
|
|
* PBSS : Power Battery Steady State
|
|
* PBSS : Power Battery Steady State
|
|
* RBHF : High Frequency Impedance
|
|
* VBNL : Instantaneous No-Load Voltage
|
|
* CMPP : Current Discharge Capability
|
|
*/
|
|
#define DPTF_POWER_SHOW(name, object) \
|
|
static ssize_t name##_show(struct device *dev,\
|
|
struct device_attribute *attr,\
|
|
char *buf)\
|
|
{\
|
|
struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
|
|
unsigned long long val;\
|
|
acpi_status status;\
|
|
\
|
|
status = acpi_evaluate_integer(acpi_dev->handle, #object,\
|
|
NULL, &val);\
|
|
if (ACPI_SUCCESS(status))\
|
|
return sprintf(buf, "%d\n", (int)val);\
|
|
else \
|
|
return -EINVAL;\
|
|
}
|
|
|
|
DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
|
|
DPTF_POWER_SHOW(platform_power_source, PSRC)
|
|
DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
|
|
DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
|
|
DPTF_POWER_SHOW(charger_type, CTYP)
|
|
DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
|
|
DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
|
|
DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
|
|
DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
|
|
DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
|
|
|
|
static DEVICE_ATTR_RO(max_platform_power_mw);
|
|
static DEVICE_ATTR_RO(platform_power_source);
|
|
static DEVICE_ATTR_RO(adapter_rating_mw);
|
|
static DEVICE_ATTR_RO(battery_steady_power_mw);
|
|
static DEVICE_ATTR_RO(charger_type);
|
|
static DEVICE_ATTR_RO(rest_of_platform_power_mw);
|
|
static DEVICE_ATTR_RO(max_steady_state_power_mw);
|
|
static DEVICE_ATTR_RO(high_freq_impedance_mohm);
|
|
static DEVICE_ATTR_RO(no_load_voltage_mv);
|
|
static DEVICE_ATTR_RO(current_discharge_capbility_ma);
|
|
|
|
static ssize_t prochot_confirm_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct acpi_device *acpi_dev = dev_get_drvdata(dev);
|
|
acpi_status status;
|
|
int seq_no;
|
|
|
|
if (kstrtouint(buf, 0, &seq_no) < 0)
|
|
return -EINVAL;
|
|
|
|
status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
|
|
if (ACPI_SUCCESS(status))
|
|
return count;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static DEVICE_ATTR_WO(prochot_confirm);
|
|
|
|
static struct attribute *dptf_power_attrs[] = {
|
|
&dev_attr_max_platform_power_mw.attr,
|
|
&dev_attr_platform_power_source.attr,
|
|
&dev_attr_adapter_rating_mw.attr,
|
|
&dev_attr_battery_steady_power_mw.attr,
|
|
&dev_attr_charger_type.attr,
|
|
&dev_attr_rest_of_platform_power_mw.attr,
|
|
&dev_attr_prochot_confirm.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group dptf_power_attribute_group = {
|
|
.attrs = dptf_power_attrs,
|
|
.name = "dptf_power"
|
|
};
|
|
|
|
static struct attribute *dptf_battery_attrs[] = {
|
|
&dev_attr_max_platform_power_mw.attr,
|
|
&dev_attr_max_steady_state_power_mw.attr,
|
|
&dev_attr_high_freq_impedance_mohm.attr,
|
|
&dev_attr_no_load_voltage_mv.attr,
|
|
&dev_attr_current_discharge_capbility_ma.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group dptf_battery_attribute_group = {
|
|
.attrs = dptf_battery_attrs,
|
|
.name = "dptf_battery"
|
|
};
|
|
|
|
#define MAX_POWER_CHANGED 0x80
|
|
#define POWER_STATE_CHANGED 0x81
|
|
#define STEADY_STATE_POWER_CHANGED 0x83
|
|
#define POWER_PROP_CHANGE_EVENT 0x84
|
|
#define IMPEDANCED_CHNGED 0x85
|
|
#define VOLTAGE_CURRENT_CHANGED 0x86
|
|
|
|
static long long dptf_participant_type(acpi_handle handle)
|
|
{
|
|
unsigned long long ptype;
|
|
acpi_status status;
|
|
|
|
status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
return ptype;
|
|
}
|
|
|
|
static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct platform_device *pdev = data;
|
|
char *attr;
|
|
|
|
switch (event) {
|
|
case POWER_STATE_CHANGED:
|
|
attr = "platform_power_source";
|
|
break;
|
|
case POWER_PROP_CHANGE_EVENT:
|
|
attr = "rest_of_platform_power_mw";
|
|
break;
|
|
case MAX_POWER_CHANGED:
|
|
attr = "max_platform_power_mw";
|
|
break;
|
|
case STEADY_STATE_POWER_CHANGED:
|
|
attr = "max_steady_state_power_mw";
|
|
break;
|
|
case VOLTAGE_CURRENT_CHANGED:
|
|
attr = "no_load_voltage_mv";
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Notify that an attribute is changed, so that user space can read
|
|
* again.
|
|
*/
|
|
if (dptf_participant_type(handle) == 0x0CULL)
|
|
sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
|
|
else
|
|
sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
|
|
}
|
|
|
|
static int dptf_power_add(struct platform_device *pdev)
|
|
{
|
|
const struct attribute_group *attr_group;
|
|
struct acpi_device *acpi_dev;
|
|
unsigned long long ptype;
|
|
int result;
|
|
|
|
acpi_dev = ACPI_COMPANION(&(pdev->dev));
|
|
if (!acpi_dev)
|
|
return -ENODEV;
|
|
|
|
ptype = dptf_participant_type(acpi_dev->handle);
|
|
if (ptype == 0x11)
|
|
attr_group = &dptf_power_attribute_group;
|
|
else if (ptype == 0x0C)
|
|
attr_group = &dptf_battery_attribute_group;
|
|
else
|
|
return -ENODEV;
|
|
|
|
result = acpi_install_notify_handler(acpi_dev->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
dptf_power_notify,
|
|
(void *)pdev);
|
|
if (result)
|
|
return result;
|
|
|
|
result = sysfs_create_group(&pdev->dev.kobj,
|
|
attr_group);
|
|
if (result) {
|
|
acpi_remove_notify_handler(acpi_dev->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
dptf_power_notify);
|
|
return result;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, acpi_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dptf_power_remove(struct platform_device *pdev)
|
|
{
|
|
struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
|
|
|
|
acpi_remove_notify_handler(acpi_dev->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
dptf_power_notify);
|
|
|
|
if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
|
|
sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
|
|
else
|
|
sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct acpi_device_id int3407_device_ids[] = {
|
|
{"INT3407", 0},
|
|
{"INT3532", 0},
|
|
{"INTC1047", 0},
|
|
{"INTC1050", 0},
|
|
{"INTC1060", 0},
|
|
{"INTC1061", 0},
|
|
{"INTC10A4", 0},
|
|
{"INTC10A5", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
|
|
|
|
static struct platform_driver dptf_power_driver = {
|
|
.probe = dptf_power_add,
|
|
.remove = dptf_power_remove,
|
|
.driver = {
|
|
.name = "dptf_power",
|
|
.acpi_match_table = int3407_device_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(dptf_power_driver);
|
|
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("ACPI DPTF platform power driver");
|