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authorAlexey Starikovskiy <astarikovskiy@suse.de>2007-09-26 17:44:06 +0200
committerLen Brown <len.brown@intel.com>2007-09-27 21:50:23 +0200
commitd5b4a3d0efa36de31b86d5677dad6c36cb8735d7 (patch)
treefc7029b7c7fbab943b1e226b955d974710948126 /drivers
parentACPI: SBS: Add sysfs alarm (diff)
downloadlinux-d5b4a3d0efa36de31b86d5677dad6c36cb8735d7.tar.xz
linux-d5b4a3d0efa36de31b86d5677dad6c36cb8735d7.zip
ACPI: AC: Add sysfs interface
Refer to Documentation/power_supply_class.txt for interface description. Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/Kconfig2
-rw-r--r--drivers/acpi/ac.c33
2 files changed, 32 insertions, 3 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index ba6a61f7aae7..a858bc528ec3 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -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
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 26d70702b313..e03de37a750d 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -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);