1 /*
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
16 #include <linux/device.h>
17 #include <linux/rwsem.h>
18 #include <linux/leds.h>
19
20 static inline void led_set_brightness(struct led_classdev *led_cdev,
21 enum led_brightness value)
22 {
23 if (value > led_cdev->max_brightness)
24 value = led_cdev->max_brightness;
25 led_cdev->brightness = value;
26 if (!(led_cdev->flags & LED_SUSPENDED))
27 led_cdev->brightness_set(led_cdev, value);
28 }
29
30 static inline int led_get_brightness(struct led_classdev *led_cdev)
31 {
32 return led_cdev->brightness;
33 }
34
35 extern struct rw_semaphore leds_list_lock;
36 extern struct list_head leds_list;
37
38 #ifdef CONFIG_LEDS_TRIGGERS
39 void led_trigger_set_default(struct led_classdev *led_cdev);
40 void led_trigger_set(struct led_classdev *led_cdev,
41 struct led_trigger *trigger);
42 void led_trigger_remove(struct led_classdev *led_cdev);
43 #else
44 #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)
47 #endif
48
49 ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
50 const char *buf, size_t count);
51 ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
52 char *buf);
53
54 #endif /* __LEDS_H_INCLUDED */
55
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