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
31 #define LED_SUSPENDED (1 << 0)
33 /* A function to set the brightness of the led */
34 void (*brightness_set)(struct led_classdev *led_cdev,
35 enum led_brightness brightness);
37 struct class_device *class_dev;
38 /* LED Device linked list */
39 struct list_head node;
42 char *default_trigger;
43 #ifdef CONFIG_LEDS_TRIGGERS
44 rwlock_t trigger_lock;
45 /* Protects the trigger data below */
47 struct led_trigger *trigger;
48 struct list_head trig_list;
53 extern int led_classdev_register(struct device *parent,
54 struct led_classdev *led_cdev);
55 extern void led_classdev_unregister(struct led_classdev *led_cdev);
56 extern void led_classdev_suspend(struct led_classdev *led_cdev);
57 extern void led_classdev_resume(struct led_classdev *led_cdev);
62 #ifdef CONFIG_LEDS_TRIGGERS
64 #define TRIG_NAME_MAX 50
67 /* Trigger Properties */
69 void (*activate)(struct led_classdev *led_cdev);
70 void (*deactivate)(struct led_classdev *led_cdev);
72 /* LEDs under control by this trigger (for simple triggers) */
73 rwlock_t leddev_list_lock;
74 struct list_head led_cdevs;
76 /* Link to next registered trigger */
77 struct list_head next_trig;
80 /* Registration functions for complex triggers */
81 extern int led_trigger_register(struct led_trigger *trigger);
82 extern void led_trigger_unregister(struct led_trigger *trigger);
84 /* Registration functions for simple triggers */
85 #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
86 #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x;
87 extern void led_trigger_register_simple(const char *name,
88 struct led_trigger **trigger);
89 extern void led_trigger_unregister_simple(struct led_trigger *trigger);
90 extern void led_trigger_event(struct led_trigger *trigger,
91 enum led_brightness event);
95 /* Triggers aren't active - null macros */
96 #define DEFINE_LED_TRIGGER(x)
97 #define DEFINE_LED_TRIGGER_GLOBAL(x)
98 #define led_trigger_register_simple(x, y) do {} while(0)
99 #define led_trigger_unregister_simple(x) do {} while(0)
100 #define led_trigger_event(x, y) do {} while(0)
104 /* Trigger specific functions */
105 #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
106 extern void ledtrig_ide_activity(void);
108 #define ledtrig_ide_activity() do {} while(0)
111 #endif /* __LINUX_LEDS_H_INCLUDED */