ACPI: Battery: add sysfs alarm
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 057a5eb..681e26b 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -687,6 +687,34 @@
}
#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 @@
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 @@
#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;