tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
20static inline void led_set_brightness_async(struct led_classdev *led_cdev,
21 enum led_brightness value)
22{
23 value = min(value, led_cdev->max_brightness);
24 led_cdev->brightness = value;
25
26 if (!(led_cdev->flags & LED_SUSPENDED))
27 led_cdev->brightness_set(led_cdev, value);
28}
29
30static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
31 enum led_brightness value)
32{
33 int ret = 0;
34
35 led_cdev->brightness = min(value, led_cdev->max_brightness);
36
37 if (!(led_cdev->flags & LED_SUSPENDED))
38 ret = led_cdev->brightness_set_sync(led_cdev,
39 led_cdev->brightness);
40 return ret;
41}
42
43static inline int led_get_brightness(struct led_classdev *led_cdev)
44{
45 return led_cdev->brightness;
46}
47
48void led_stop_software_blink(struct led_classdev *led_cdev);
49
50extern struct rw_semaphore leds_list_lock;
51extern struct list_head leds_list;
52
53#ifdef CONFIG_LEDS_TRIGGERS
54void led_trigger_set_default(struct led_classdev *led_cdev);
55void led_trigger_set(struct led_classdev *led_cdev,
56 struct led_trigger *trigger);
57void led_trigger_remove(struct led_classdev *led_cdev);
58
59static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
60{
61 return led_cdev->trigger_data;
62}
63
64#else
65#define led_trigger_set_default(x) do {} while (0)
66#define led_trigger_set(x, y) do {} while (0)
67#define led_trigger_remove(x) do {} while (0)
68#define led_get_trigger_data(x) (NULL)
69#endif
70
71ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
72 const char *buf, size_t count);
73ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
74 char *buf);
75
76#endif /* __LEDS_H_INCLUDED */