diff options
Diffstat (limited to 'drivers/acpi/battery.c')
-rw-r--r-- | drivers/acpi/battery.c | 77 |
1 files changed, 64 insertions, 13 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 6e7b2a12860d..e48fc98e71c4 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 |