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Commit 9534cc31 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Jacek Anaszewski
Browse files

leds: core: add managed version of led_trigger_register 



Complementing devm_led_classdev_register add a managed version of
led_trigger_register.

I omit a managed version of led_classdev_unregister as the equivalent
devm_led_classdev_unregister isn't used in the kernel as of today.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarJacek Anaszewski <j.anaszewski@samsung.com>
parent 1259efaa

drivers/leds/led-triggers.c

+28 −0
Original line number Diff line number Diff line
@@ -249,6 +249,34 @@ void led_trigger_unregister(struct led_trigger *trig) 
}

EXPORT_SYMBOL_GPL(led_trigger_unregister);



static void devm_led_trigger_release(struct device *dev, void *res)

{

	led_trigger_unregister(*(struct led_trigger **)res);

}



int devm_led_trigger_register(struct device *dev,

			      struct led_trigger *trig)

{

	struct led_trigger **dr;

	int rc;



	dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),

			  GFP_KERNEL);

	if (!dr)

		return -ENOMEM;



	*dr = trig;



	rc = led_trigger_register(trig);

	if (rc)

		devres_free(dr);

	else

		devres_add(dev, dr);



	return rc;

}

EXPORT_SYMBOL_GPL(devm_led_trigger_register);



/* Simple LED Tigger Interface */



void led_trigger_event(struct led_trigger *trig,

include/linux/leds.h

+2 −0
Original line number Diff line number Diff line
@@ -246,6 +246,8 @@ ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 
/* Registration functions for complex triggers */

extern int led_trigger_register(struct led_trigger *trigger);

extern void led_trigger_unregister(struct led_trigger *trigger);

extern int devm_led_trigger_register(struct device *dev,

				     struct led_trigger *trigger);



extern void led_trigger_register_simple(const char *name,

				struct led_trigger **trigger);