81fe8e5b73
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>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* LED Kernel Default ON Trigger
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*
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* Copyright 2008 Nick Forbes <nick.forbes@incepta.com>
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*
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* Based on Richard Purdie's ledtrig-timer.c.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#include "../leds.h"
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static void defon_trig_activate(struct led_classdev *led_cdev)
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{
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led_set_brightness_nosleep(led_cdev, led_cdev->max_brightness);
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}
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static struct led_trigger defon_led_trigger = {
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.name = "default-on",
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.activate = defon_trig_activate,
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};
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static int __init defon_trig_init(void)
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{
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return led_trigger_register(&defon_led_trigger);
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}
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static void __exit defon_trig_exit(void)
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{
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led_trigger_unregister(&defon_led_trigger);
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}
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module_init(defon_trig_init);
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module_exit(defon_trig_exit);
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MODULE_AUTHOR("Nick Forbes <nick.forbes@incepta.com>");
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MODULE_DESCRIPTION("Default-ON LED trigger");
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MODULE_LICENSE("GPL");
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