72f8da329e
Covert leds_list_lock to a rw_sempahore to match previous LED trigger locking fixes, fixing lock ordering. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
48 lines
1.3 KiB
C
48 lines
1.3 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/device.h>
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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(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value > LED_FULL)
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value = LED_FULL;
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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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extern struct rw_semaphore leds_list_lock;
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extern struct list_head leds_list;
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#ifdef CONFIG_LEDS_TRIGGERS
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void led_trigger_set_default(struct led_classdev *led_cdev);
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void led_trigger_set(struct led_classdev *led_cdev,
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struct led_trigger *trigger);
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#else
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#define led_trigger_set_default(x) do {} while(0)
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#define led_trigger_set(x, y) do {} while(0)
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#endif
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ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
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char *buf);
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#endif /* __LEDS_H_INCLUDED */
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