2 * Driver model for leds and led triggers
4 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
5 * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #ifndef __LINUX_LEDS_H_INCLUDED
13 #define __LINUX_LEDS_H_INCLUDED
15 #include <linux/list.h>
16 #include <linux/spinlock.h>
34 #define LED_SUSPENDED (1 << 0)
36 /* Set LED brightness level */
37 void (*brightness_set)(struct led_classdev *led_cdev,
38 enum led_brightness brightness);
41 struct list_head node; /* LED Device list */
42 char *default_trigger; /* Trigger to use */
44 #ifdef CONFIG_LEDS_TRIGGERS
45 /* Protects the trigger data below */
46 rwlock_t trigger_lock;
48 struct led_trigger *trigger;
49 struct list_head trig_list;
54 extern int led_classdev_register(struct device *parent,
55 struct led_classdev *led_cdev);
56 extern void led_classdev_unregister(struct led_classdev *led_cdev);
57 extern void led_classdev_suspend(struct led_classdev *led_cdev);
58 extern void led_classdev_resume(struct led_classdev *led_cdev);
63 #ifdef CONFIG_LEDS_TRIGGERS
65 #define TRIG_NAME_MAX 50
68 /* Trigger Properties */
70 void (*activate)(struct led_classdev *led_cdev);
71 void (*deactivate)(struct led_classdev *led_cdev);
73 /* LEDs under control by this trigger (for simple triggers) */
74 rwlock_t leddev_list_lock;
75 struct list_head led_cdevs;
77 /* Link to next registered trigger */
78 struct list_head next_trig;
81 /* Registration functions for complex triggers */
82 extern int led_trigger_register(struct led_trigger *trigger);
83 extern void led_trigger_unregister(struct led_trigger *trigger);
85 /* Registration functions for simple triggers */
86 #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
87 #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x;
88 extern void led_trigger_register_simple(const char *name,
89 struct led_trigger **trigger);
90 extern void led_trigger_unregister_simple(struct led_trigger *trigger);
91 extern void led_trigger_event(struct led_trigger *trigger,
92 enum led_brightness event);
96 /* Triggers aren't active - null macros */
97 #define DEFINE_LED_TRIGGER(x)
98 #define DEFINE_LED_TRIGGER_GLOBAL(x)
99 #define led_trigger_register_simple(x, y) do {} while(0)
100 #define led_trigger_unregister_simple(x) do {} while(0)
101 #define led_trigger_event(x, y) do {} while(0)
105 /* Trigger specific functions */
106 #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
107 extern void ledtrig_ide_activity(void);
109 #define ledtrig_ide_activity() do {} while(0)
112 /* For the leds-gpio driver */
115 char *default_trigger;
120 struct gpio_led_platform_data {
122 struct gpio_led *leds;
126 #endif /* __LINUX_LEDS_H_INCLUDED */