提交 d5b4a3d0 编写于 作者: A Alexey Starikovskiy 提交者: Len Brown

ACPI: AC: Add sysfs interface

Refer to Documentation/power_supply_class.txt for interface description.
Signed-off-by: NAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: NLen Brown <len.brown@intel.com>
上级 8bd95532
...@@ -88,7 +88,7 @@ config ACPI_PROC_EVENT ...@@ -88,7 +88,7 @@ config ACPI_PROC_EVENT
config ACPI_AC config ACPI_AC
tristate "AC Adapter" tristate "AC Adapter"
depends on X86 depends on X86 && POWER_SUPPLY
default y default y
help help
This driver adds support for the AC Adapter object, which indicates This driver adds support for the AC Adapter object, which indicates
......
...@@ -29,6 +29,7 @@ ...@@ -29,6 +29,7 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/power_supply.h>
#include <acpi/acpi_bus.h> #include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h> #include <acpi/acpi_drivers.h>
...@@ -72,16 +73,37 @@ static struct acpi_driver acpi_ac_driver = { ...@@ -72,16 +73,37 @@ static struct acpi_driver acpi_ac_driver = {
}; };
struct acpi_ac { struct acpi_ac {
struct power_supply charger;
struct acpi_device * device; struct acpi_device * device;
unsigned long state; unsigned long state;
}; };
#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
static const struct file_operations acpi_ac_fops = { static const struct file_operations acpi_ac_fops = {
.open = acpi_ac_open_fs, .open = acpi_ac_open_fs,
.read = seq_read, .read = seq_read,
.llseek = seq_lseek, .llseek = seq_lseek,
.release = single_release, .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 AC Adapter Management
...@@ -208,6 +230,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) ...@@ -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, acpi_bus_generate_netlink_event(device->pnp.device_class,
device->dev.bus_id, event, device->dev.bus_id, event,
(u32) ac->state); (u32) ac->state);
kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
break; break;
default: default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO, ACPI_DEBUG_PRINT((ACPI_DB_INFO,
...@@ -244,7 +267,12 @@ static int acpi_ac_add(struct acpi_device *device) ...@@ -244,7 +267,12 @@ static int acpi_ac_add(struct acpi_device *device)
result = acpi_ac_add_fs(device); result = acpi_ac_add_fs(device);
if (result) if (result)
goto end; 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, status = acpi_install_notify_handler(device->handle,
ACPI_ALL_NOTIFY, acpi_ac_notify, ACPI_ALL_NOTIFY, acpi_ac_notify,
ac); ac);
...@@ -279,7 +307,8 @@ static int acpi_ac_remove(struct acpi_device *device, int type) ...@@ -279,7 +307,8 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
status = acpi_remove_notify_handler(device->handle, status = acpi_remove_notify_handler(device->handle,
ACPI_ALL_NOTIFY, acpi_ac_notify); ACPI_ALL_NOTIFY, acpi_ac_notify);
if (ac->charger.dev)
power_supply_unregister(&ac->charger);
acpi_ac_remove_fs(device); acpi_ac_remove_fs(device);
kfree(ac); kfree(ac);
......
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