diff options
| -rw-r--r-- | drivers/acpi/battery.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 057a5eb67cc..681e26b56b1 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -687,6 +687,34 @@ static void acpi_battery_remove_fs(struct acpi_device *device) } #endif + +static ssize_t acpi_battery_alarm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + return sprintf(buf, "%d\n", battery->alarm * 1000); +} + +static ssize_t acpi_battery_alarm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long x; + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + if (sscanf(buf, "%ld\n", &x) == 1) + battery->alarm = x/1000; + if (acpi_battery_present(battery)) + acpi_battery_set_alarm(battery); + return count; +} + +static struct device_attribute alarm_attr = { + .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, + .show = acpi_battery_alarm_show, + .store = acpi_battery_alarm_store, +}; + /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ @@ -732,6 +760,7 @@ static int acpi_battery_add(struct acpi_device *device) 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 = device_create_file(battery->bat.dev, &alarm_attr); status = acpi_install_notify_handler(device->handle, ACPI_ALL_NOTIFY, acpi_battery_notify, battery); @@ -767,8 +796,10 @@ static int acpi_battery_remove(struct acpi_device *device, int type) #ifdef CONFIG_ACPI_PROCFS acpi_battery_remove_fs(device); #endif - if (battery->bat.dev) + if (battery->bat.dev) { + device_remove_file(battery->bat.dev, &alarm_attr); power_supply_unregister(&battery->bat); + } mutex_destroy(&battery->lock); kfree(battery); return 0; |