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Richard Purdiec72a1d62006-03-31 02:31:04 -08001/*
2 * LED Core
3 *
4 * Copyright 2005 Openedhand Ltd.
5 *
6 * Author: Richard Purdie <rpurdie@openedhand.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13#ifndef __LEDS_H_INCLUDED
14#define __LEDS_H_INCLUDED
15
Richard Purdief8a7c6f2007-07-08 23:19:31 +010016#include <linux/device.h>
Richard Purdie72f8da32007-12-31 23:09:44 +000017#include <linux/rwsem.h>
Richard Purdiec72a1d62006-03-31 02:31:04 -080018#include <linux/leds.h>
19
20static inline void led_set_brightness(struct led_classdev *led_cdev,
21 enum led_brightness value)
22{
Guennadi Liakhovetski1bd465e2009-01-10 18:54:39 +000023 if (value > led_cdev->max_brightness)
24 value = led_cdev->max_brightness;
Richard Purdiec72a1d62006-03-31 02:31:04 -080025 led_cdev->brightness = value;
26 if (!(led_cdev->flags & LED_SUSPENDED))
27 led_cdev->brightness_set(led_cdev, value);
28}
29
Németh Márton0013b232008-03-09 20:54:37 +000030static inline int led_get_brightness(struct led_classdev *led_cdev)
31{
32 return led_cdev->brightness;
33}
34
Richard Purdie72f8da32007-12-31 23:09:44 +000035extern struct rw_semaphore leds_list_lock;
Richard Purdiec72a1d62006-03-31 02:31:04 -080036extern struct list_head leds_list;
37
Richard Purdiec3bc9952006-03-31 02:31:05 -080038#ifdef CONFIG_LEDS_TRIGGERS
39void led_trigger_set_default(struct led_classdev *led_cdev);
40void led_trigger_set(struct led_classdev *led_cdev,
41 struct led_trigger *trigger);
Németh Márton0013b232008-03-09 20:54:37 +000042void led_trigger_remove(struct led_classdev *led_cdev);
Richard Purdiec3bc9952006-03-31 02:31:05 -080043#else
Németh Márton4d404fd2008-03-09 20:59:57 +000044#define led_trigger_set_default(x) do {} while (0)
45#define led_trigger_set(x, y) do {} while (0)
46#define led_trigger_remove(x) do {} while (0)
Richard Purdiec3bc9952006-03-31 02:31:05 -080047#endif
48
Richard Purdief8a7c6f2007-07-08 23:19:31 +010049ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
50 const char *buf, size_t count);
51ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
52 char *buf);
Richard Purdiec3bc9952006-03-31 02:31:05 -080053
Richard Purdiec72a1d62006-03-31 02:31:04 -080054#endif /* __LEDS_H_INCLUDED */