Merge branches 'acpi-pm', 'acpi-enumeration' and 'acpi-sysfs'

* acpi-pm:
  ACPI / PM: Enable all wakeup GPEs in suspend-to-idle
  ACPI / sleep: Drop acpi_suspend() which is not used

* acpi-enumeration:
  ACPI: Add acpi_device_uid() for convenience
  ACPI: Update GPIO documentation to mention _DSD

* acpi-sysfs:
  ACPI / sysfs: Treat the count field of counter_show() as unsigned

Documentation/acpi/enumeration.txt

@@ -254,8 +254,13 @@ GPIO support
 ~~~~~~~~~~~~
 ACPI 5 introduced two new resources to describe GPIO connections: GpioIo
 and GpioInt. These resources are used be used to pass GPIO numbers used by
-the device to the driver. For example:
+the device to the driver. ACPI 5.1 extended this with _DSD (Device
+Specific Data) which made it possible to name the GPIOs among other things.
 
+For example:
+
+Device (DEV)
+{
 	Method (_CRS, 0, NotSerialized)
 	{
 		Name (SBUF, ResourceTemplate()
@@ -285,6 +290,18 @@ the device to the driver. For example:
 		Return (SBUF)
 	}
 
+	// ACPI 5.1 _DSD used for naming the GPIOs
+	Name (_DSD, Package ()
+	{
+		ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package ()
+		{
+			Package () {"power-gpios", Package() {^DEV, 0, 0, 0 }},
+			Package () {"irq-gpios", Package() {^DEV, 1, 0, 0 }},
+		}
+	})
+	...
+
 These GPIO numbers are controller relative and path "\\_SB.PCI0.GPI0"
 specifies the path to the controller. In order to use these GPIOs in Linux
 we need to translate them to the corresponding Linux GPIO descriptors.
@@ -300,11 +317,11 @@ a code like this:
 
 	struct gpio_desc *irq_desc, *power_desc;
 
-	irq_desc = gpiod_get_index(dev, NULL, 1);
+	irq_desc = gpiod_get(dev, "irq");
 	if (IS_ERR(irq_desc))
 		/* handle error */
 
-	power_desc = gpiod_get_index(dev, NULL, 0);
+	power_desc = gpiod_get(dev, "power");
 	if (IS_ERR(power_desc))
 		/* handle error */
 
@@ -313,6 +330,9 @@ a code like this:
 There are also devm_* versions of these functions which release the
 descriptors once the device is released.
 
+See Documentation/acpi/gpio-properties.txt for more information about the
+_DSD binding related to GPIOs.
+
 MFD devices
 ~~~~~~~~~~~
 The MFD devices register their children as platform devices. For the child

drivers/acpi/sleep.c

@@ -629,6 +629,7 @@ static int acpi_freeze_begin(void)
 
 static int acpi_freeze_prepare(void)
 {
+	acpi_enable_wakeup_devices(ACPI_STATE_S0);
 	acpi_enable_all_wakeup_gpes();
 	acpi_os_wait_events_complete();
 	enable_irq_wake(acpi_gbl_FADT.sci_interrupt);
@@ -637,6 +638,7 @@ static int acpi_freeze_prepare(void)
 
 static void acpi_freeze_restore(void)
 {
+	acpi_disable_wakeup_devices(ACPI_STATE_S0);
 	disable_irq_wake(acpi_gbl_FADT.sci_interrupt);
 	acpi_enable_all_runtime_gpes();
 }
@@ -806,21 +808,6 @@ static void acpi_sleep_hibernate_setup(void)
 static inline void acpi_sleep_hibernate_setup(void) {}
 #endif /* !CONFIG_HIBERNATION */
 
-int acpi_suspend(u32 acpi_state)
-{
-	suspend_state_t states[] = {
-		[1] = PM_SUSPEND_STANDBY,
-		[3] = PM_SUSPEND_MEM,
-		[5] = PM_SUSPEND_MAX
-	};
-
-	if (acpi_state < 6 && states[acpi_state])
-		return pm_suspend(states[acpi_state]);
-	if (acpi_state == 4)
-		return hibernate();
-	return -EINVAL;
-}
-
 static void acpi_power_off_prepare(void)
 {
 	/* Prepare to power off the system */

drivers/acpi/sleep.h

@@ -1,6 +1,4 @@
 
-extern int acpi_suspend(u32 state);
-
 extern void acpi_enable_wakeup_devices(u8 sleep_state);
 extern void acpi_disable_wakeup_devices(u8 sleep_state);
 

drivers/acpi/sysfs.c

@@ -527,7 +527,7 @@ static ssize_t counter_show(struct kobject *kobj,
 	    acpi_irq_not_handled;
 	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 	    acpi_gpe_count;
-	size = sprintf(buf, "%8d", all_counters[index].count);
+	size = sprintf(buf, "%8u", all_counters[index].count);
 
 	/* "gpe_all" or "sci" */
 	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)

include/acpi/acpi_bus.h

@@ -252,6 +252,7 @@ struct acpi_device_pnp {
 #define acpi_device_bid(d)	((d)->pnp.bus_id)
 #define acpi_device_adr(d)	((d)->pnp.bus_address)
 const char *acpi_device_hid(struct acpi_device *device);
+#define acpi_device_uid(d)	((d)->pnp.unique_id)
 #define acpi_device_name(d)	((d)->pnp.device_name)
 #define acpi_device_class(d)	((d)->pnp.device_class)