Commit d2c54153 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Rafael J. Wysocki
Browse files

kernel/reboot: Add devm_register_power_off_handler() 



Add devm_register_power_off_handler() helper that registers sys-off
handler using power-off mode and with a default priority. Most drivers
will want to register power-off handler with a default priority, so this
helper will reduce the boilerplate code and make code easier to read and
follow.

Signed-off-by: default avatarDmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent eae813b7

include/linux/reboot.h

+4 −0
Original line number Diff line number Diff line
@@ -141,6 +141,10 @@ int devm_register_sys_off_handler(struct device *dev, 
				  int (*callback)(struct sys_off_data *data),

				  void *cb_data);



int devm_register_power_off_handler(struct device *dev,

				    int (*callback)(struct sys_off_data *data),

				    void *cb_data);



int register_platform_power_off(void (*power_off)(void));

void unregister_platform_power_off(void (*power_off)(void));

kernel/reboot.c

+22 −0
Original line number Diff line number Diff line
@@ -462,6 +462,28 @@ int devm_register_sys_off_handler(struct device *dev, 
}

EXPORT_SYMBOL_GPL(devm_register_sys_off_handler);



/**

 *	devm_register_power_off_handler - Register power-off handler

 *	@dev: Device that registers callback

 *	@callback: Callback function

 *	@cb_data: Callback's argument

 *

 *	Registers resource-managed sys-off handler with a default priority

 *	and using power-off mode.

 *

 *	Returns zero on success, or error code on failure.

 */

int devm_register_power_off_handler(struct device *dev,

				    int (*callback)(struct sys_off_data *data),

				    void *cb_data)

{

	return devm_register_sys_off_handler(dev,

					     SYS_OFF_MODE_POWER_OFF,

					     SYS_OFF_PRIO_DEFAULT,

					     callback, cb_data);

}

EXPORT_SYMBOL_GPL(devm_register_power_off_handler);



static struct sys_off_handler *platform_power_off_handler;



static int platform_power_off_notify(struct sys_off_data *data)