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>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* LED Core
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*
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* Copyright 2005 Openedhand Ltd.
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*
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* Author: Richard Purdie <rpurdie@openedhand.com>
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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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#ifndef __LEDS_H_INCLUDED
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#define __LEDS_H_INCLUDED
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#include <linux/rwsem.h>
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#include <linux/leds.h>
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static inline void led_set_brightness_async(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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value = min(value, led_cdev->max_brightness);
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led_cdev->brightness = value;
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if (!(led_cdev->flags & LED_SUSPENDED))
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led_cdev->brightness_set(led_cdev, value);
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}
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static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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int ret = 0;
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led_cdev->brightness = min(value, led_cdev->max_brightness);
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if (!(led_cdev->flags & LED_SUSPENDED))
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ret = led_cdev->brightness_set_blocking(led_cdev,
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led_cdev->brightness);
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return ret;
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}
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static inline int led_get_brightness(struct led_classdev *led_cdev)
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{
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return led_cdev->brightness;
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}
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void led_init_core(struct led_classdev *led_cdev);
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void led_stop_software_blink(struct led_classdev *led_cdev);
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void led_set_brightness_nopm(struct led_classdev *led_cdev,
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enum led_brightness value);
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void led_set_brightness_nosleep(struct led_classdev *led_cdev,
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enum led_brightness value);
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extern struct rw_semaphore leds_list_lock;
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extern struct list_head leds_list;
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#endif /* __LEDS_H_INCLUDED */
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