diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 6e7b2a12860d31ac533c730e97d080daaa6f1385..e48fc98e71c48379694bbbd76119dd1c222660ac 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -56,6 +56,10 @@
/* Battery power unit: 0 means mW, 1 means mA */
#define ACPI_BATTERY_POWER_UNIT_MA 1
+#define ACPI_BATTERY_STATE_DISCHARGING 0x1
+#define ACPI_BATTERY_STATE_CHARGING 0x2
+#define ACPI_BATTERY_STATE_CRITICAL 0x4
+
#define _COMPONENT ACPI_BATTERY_COMPONENT
ACPI_MODULE_NAME("battery");
@@ -169,7 +173,7 @@ static int acpi_battery_get_state(struct acpi_battery *battery);
static int acpi_battery_is_charged(struct acpi_battery *battery)
{
- /* either charging or discharging */
+ /* charging, discharging or critical low */
if (battery->state != 0)
return 0;
@@ -204,9 +208,9 @@ static int acpi_battery_get_property(struct power_supply *psy,
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
- if (battery->state & 0x01)
+ if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
- else if (battery->state & 0x02)
+ else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (acpi_battery_is_charged(battery))
val->intval = POWER_SUPPLY_STATUS_FULL;
@@ -269,6 +273,17 @@ static int acpi_battery_get_property(struct power_supply *psy,
else
val->intval = 0;
break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
+ (battery->capacity_now <= battery->alarm))
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else if (acpi_battery_is_charged(battery))
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = battery->model_number;
break;
@@ -296,6 +311,7 @@ static enum power_supply_property charge_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
@@ -313,6 +329,7 @@ static enum power_supply_property energy_battery_props[] = {
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
@@ -605,7 +622,8 @@ static int sysfs_add_battery(struct acpi_battery *battery)
battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
battery->bat.get_property = acpi_battery_get_property;
- result = power_supply_register(&battery->device->dev, &battery->bat);
+ result = power_supply_register_no_ws(&battery->device->dev, &battery->bat);
+
if (result)
return result;
return device_create_file(battery->bat.dev, &alarm_attr);
@@ -696,7 +714,7 @@ static void acpi_battery_quirks(struct acpi_battery *battery)
}
}
-static int acpi_battery_update(struct acpi_battery *battery)
+static int acpi_battery_update(struct acpi_battery *battery, bool resume)
{
int result, old_present = acpi_battery_present(battery);
result = acpi_battery_get_status(battery);
@@ -707,6 +725,10 @@ static int acpi_battery_update(struct acpi_battery *battery)
battery->update_time = 0;
return 0;
}
+
+ if (resume)
+ return 0;
+
if (!battery->update_time ||
old_present != acpi_battery_present(battery)) {
result = acpi_battery_get_info(battery);
@@ -720,7 +742,19 @@ static int acpi_battery_update(struct acpi_battery *battery)
return result;
}
result = acpi_battery_get_state(battery);
+ if (result)
+ return result;
acpi_battery_quirks(battery);
+
+ /*
+ * Wakeup the system if battery is critical low
+ * or lower than the alarm level
+ */
+ if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
+ (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
+ (battery->capacity_now <= battery->alarm)))
+ pm_wakeup_event(&battery->device->dev, 0);
+
return result;
}
@@ -915,7 +949,7 @@ static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
static int acpi_battery_read(int fid, struct seq_file *seq)
{
struct acpi_battery *battery = seq->private;
- int result = acpi_battery_update(battery);
+ int result = acpi_battery_update(battery, false);
return acpi_print_funcs[fid](seq, result);
}
@@ -1030,7 +1064,7 @@ static void acpi_battery_notify(struct acpi_device *device, u32 event)
old = battery->bat.dev;
if (event == ACPI_BATTERY_NOTIFY_INFO)
acpi_battery_refresh(battery);
- acpi_battery_update(battery);
+ acpi_battery_update(battery, false);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event,
acpi_battery_present(battery));
@@ -1045,13 +1079,27 @@ static int battery_notify(struct notifier_block *nb,
{
struct acpi_battery *battery = container_of(nb, struct acpi_battery,
pm_nb);
+ int result;
+
switch (mode) {
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
- if (battery->bat.dev) {
- sysfs_remove_battery(battery);
- sysfs_add_battery(battery);
- }
+ if (!acpi_battery_present(battery))
+ return 0;
+
+ if (!battery->bat.dev) {
+ result = acpi_battery_get_info(battery);
+ if (result)
+ return result;
+
+ result = sysfs_add_battery(battery);
+ if (result)
+ return result;
+ } else
+ acpi_battery_refresh(battery);
+
+ acpi_battery_init_alarm(battery);
+ acpi_battery_get_state(battery);
break;
}
@@ -1087,7 +1135,7 @@ static int acpi_battery_add(struct acpi_device *device)
mutex_init(&battery->sysfs_lock);
if (acpi_has_method(battery->device->handle, "_BIX"))
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
- result = acpi_battery_update(battery);
+ result = acpi_battery_update(battery, false);
if (result)
goto fail;
#ifdef CONFIG_ACPI_PROCFS_POWER
@@ -1107,6 +1155,8 @@ static int acpi_battery_add(struct acpi_device *device)
battery->pm_nb.notifier_call = battery_notify;
register_pm_notifier(&battery->pm_nb);
+ device_init_wakeup(&device->dev, 1);
+
return result;
fail:
@@ -1123,6 +1173,7 @@ static int acpi_battery_remove(struct acpi_device *device)
if (!device || !acpi_driver_data(device))
return -EINVAL;
+ device_init_wakeup(&device->dev, 0);
battery = acpi_driver_data(device);
unregister_pm_notifier(&battery->pm_nb);
#ifdef CONFIG_ACPI_PROCFS_POWER
@@ -1149,7 +1200,7 @@ static int acpi_battery_resume(struct device *dev)
return -EINVAL;
battery->update_time = 0;
- acpi_battery_update(battery);
+ acpi_battery_update(battery, true);
return 0;
}
#else
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 26606641fe44d5b250caaa8eccd972701c290737..5a5a24e7d43c25f6d23bbc686cf3fb27697ad2a9 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -537,7 +537,7 @@ static void psy_unregister_cooler(struct power_supply *psy)
}
#endif
-int power_supply_register(struct device *parent, struct power_supply *psy)
+int __power_supply_register(struct device *parent, struct power_supply *psy, bool ws)
{
struct device *dev;
int rc;
@@ -568,7 +568,7 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
}
spin_lock_init(&psy->changed_lock);
- rc = device_init_wakeup(dev, true);
+ rc = device_init_wakeup(dev, ws);
if (rc)
goto wakeup_init_failed;
@@ -606,8 +606,19 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
success:
return rc;
}
+
+int power_supply_register(struct device *parent, struct power_supply *psy)
+{
+ return __power_supply_register(parent, psy, true);
+}
EXPORT_SYMBOL_GPL(power_supply_register);
+int power_supply_register_no_ws(struct device *parent, struct power_supply *psy)
+{
+ return __power_supply_register(parent, psy, false);
+}
+EXPORT_SYMBOL_GPL(power_supply_register_no_ws);
+
void power_supply_unregister(struct power_supply *psy)
{
cancel_work_sync(&psy->changed_work);
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index c9dc4e09854cb87f728ad797d940ac4c8b1b4b14..f2b76aeaf4e45f167127876811121aecdee74300 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -264,6 +264,8 @@ static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
extern int power_supply_register(struct device *parent,
struct power_supply *psy);
+extern int power_supply_register_no_ws(struct device *parent,
+ struct power_supply *psy);
extern void power_supply_unregister(struct power_supply *psy);
extern int power_supply_powers(struct power_supply *psy, struct device *dev);