leds: Convert from struct class_device to struct device
[linux-2.6.git] / include / linux / leds.h
1 /*
2  * Driver model for leds and led triggers
3  *
4  * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
5  * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
6  *
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.
10  *
11  */
12 #ifndef __LINUX_LEDS_H_INCLUDED
13 #define __LINUX_LEDS_H_INCLUDED
14
15 #include <linux/list.h>
16 #include <linux/spinlock.h>
17
18 struct device;
19 /*
20  * LED Core
21  */
22
23 enum led_brightness {
24         LED_OFF         = 0,
25         LED_HALF        = 127,
26         LED_FULL        = 255,
27 };
28
29 struct led_classdev {
30         const char              *name;
31         int                      brightness;
32         int                      flags;
33
34 #define LED_SUSPENDED           (1 << 0)
35
36         /* Set LED brightness level */
37         void            (*brightness_set)(struct led_classdev *led_cdev,
38                                           enum led_brightness brightness);
39
40         struct device           *dev;
41         struct list_head         node;                  /* LED Device list */
42         char                    *default_trigger;       /* Trigger to use */
43
44 #ifdef CONFIG_LEDS_TRIGGERS
45         /* Protects the trigger data below */
46         rwlock_t                 trigger_lock;
47
48         struct led_trigger      *trigger;
49         struct list_head         trig_list;
50         void                    *trigger_data;
51 #endif
52 };
53
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);
59
60 /*
61  * LED Triggers
62  */
63 #ifdef CONFIG_LEDS_TRIGGERS
64
65 #define TRIG_NAME_MAX 50
66
67 struct led_trigger {
68         /* Trigger Properties */
69         const char       *name;
70         void            (*activate)(struct led_classdev *led_cdev);
71         void            (*deactivate)(struct led_classdev *led_cdev);
72
73         /* LEDs under control by this trigger (for simple triggers) */
74         rwlock_t          leddev_list_lock;
75         struct list_head  led_cdevs;
76
77         /* Link to next registered trigger */
78         struct list_head  next_trig;
79 };
80
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);
84
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);
93
94 #else
95
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)
102
103 #endif
104
105 /* Trigger specific functions */
106 #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
107 extern void ledtrig_ide_activity(void);
108 #else
109 #define ledtrig_ide_activity() do {} while(0)
110 #endif
111
112 /* For the leds-gpio driver */
113 struct gpio_led {
114         const char *name;
115         char *default_trigger;
116         unsigned        gpio;
117         u8              active_low;
118 };
119
120 struct gpio_led_platform_data {
121         int             num_leds;
122         struct gpio_led *leds;
123 };
124
125
126 #endif          /* __LINUX_LEDS_H_INCLUDED */