mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
![Jacek Anaszewski](/assets/img/avatar_default.png)
This patch adds led_set_brightness_nosleep() and led_set_brightness_nopm() functions, that guarantee setting LED brightness in a non-blocking way. The latter is used from pm_ops context and doesn't modify the brightness cached in the struct led_classdev. Its execution always ends up with a call to brightness setting op - either directly or through a set_brightness_work, regardless of LED_SUSPENDED flag state. The patch also replaces led_set_brightness_async() with led_set_brightness_nosleep() in all places where the most vital was setting brightness in a non sleeping way but not necessarily asynchronously, which is not needed for non-blocking drivers. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
|
|
* LED Kernel Default ON Trigger
|
|
*
|
|
* Copyright 2008 Nick Forbes <nick.forbes@incepta.com>
|
|
*
|
|
* Based on Richard Purdie's ledtrig-timer.c.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/leds.h>
|
|
#include "../leds.h"
|
|
|
|
static void defon_trig_activate(struct led_classdev *led_cdev)
|
|
{
|
|
led_set_brightness_nosleep(led_cdev, led_cdev->max_brightness);
|
|
}
|
|
|
|
static struct led_trigger defon_led_trigger = {
|
|
.name = "default-on",
|
|
.activate = defon_trig_activate,
|
|
};
|
|
|
|
static int __init defon_trig_init(void)
|
|
{
|
|
return led_trigger_register(&defon_led_trigger);
|
|
}
|
|
|
|
static void __exit defon_trig_exit(void)
|
|
{
|
|
led_trigger_unregister(&defon_led_trigger);
|
|
}
|
|
|
|
module_init(defon_trig_init);
|
|
module_exit(defon_trig_exit);
|
|
|
|
MODULE_AUTHOR("Nick Forbes <nick.forbes@incepta.com>");
|
|
MODULE_DESCRIPTION("Default-ON LED trigger");
|
|
MODULE_LICENSE("GPL");
|