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Commit d5b4a3d0 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown
Browse files

ACPI: AC: Add sysfs interface 



Refer to Documentation/power_supply_class.txt for interface description.

Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 8bd95532

drivers/acpi/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -88,7 +88,7 @@ config ACPI_PROC_EVENT 


config ACPI_AC

	tristate "AC Adapter"

	depends on X86

	depends on X86 && POWER_SUPPLY

	default y

	help

	  This driver adds support for the AC Adapter object, which indicates

drivers/acpi/ac.c

+31 −2
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/types.h>

#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#include <linux/power_supply.h>

#include <acpi/acpi_bus.h>

#include <acpi/acpi_drivers.h>
@@ -72,16 +73,37 @@ static struct acpi_driver acpi_ac_driver = { 
};



struct acpi_ac {

	struct power_supply charger;

	struct acpi_device * device;

	unsigned long state;

};



#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);



static const struct file_operations acpi_ac_fops = {

	.open = acpi_ac_open_fs,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};

static int get_ac_property(struct power_supply *psy,

			   enum power_supply_property psp,

			   union power_supply_propval *val)

{

	struct acpi_ac *ac = to_acpi_ac(psy);

	switch (psp) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval = ac->state;

		break;

	default:

		return -EINVAL;

	}

	return 0;

}



static enum power_supply_property ac_props[] = {

	POWER_SUPPLY_PROP_ONLINE,

};



/* --------------------------------------------------------------------------

                               AC Adapter Management
@@ -208,6 +230,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) 
		acpi_bus_generate_netlink_event(device->pnp.device_class,

						  device->dev.bus_id, event,

						  (u32) ac->state);

		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);

		break;

	default:

		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -244,7 +267,12 @@ static int acpi_ac_add(struct acpi_device *device) 
	result = acpi_ac_add_fs(device);

	if (result)

		goto end;



	ac->charger.name = acpi_device_bid(device);

	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;

	ac->charger.properties = ac_props;

	ac->charger.num_properties = ARRAY_SIZE(ac_props);

	ac->charger.get_property = get_ac_property;

	power_supply_register(&ac->device->dev, &ac->charger);

	status = acpi_install_notify_handler(device->handle,

					     ACPI_ALL_NOTIFY, acpi_ac_notify,

					     ac);
@@ -279,7 +307,8 @@ static int acpi_ac_remove(struct acpi_device *device, int type) 


	status = acpi_remove_notify_handler(device->handle,

					    ACPI_ALL_NOTIFY, acpi_ac_notify);



	if (ac->charger.dev)

		power_supply_unregister(&ac->charger);

	acpi_ac_remove_fs(device);



	kfree(ac);