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c72a1d60 RP |
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 | ||
af410fc1 JB |
15 | #include <linux/list.h> |
16 | #include <linux/spinlock.h> | |
17 | ||
c72a1d60 RP |
18 | struct device; |
19 | struct class_device; | |
20 | /* | |
21 | * LED Core | |
22 | */ | |
23 | ||
24 | enum led_brightness { | |
fb5035db BD |
25 | LED_OFF = 0, |
26 | LED_HALF = 127, | |
27 | LED_FULL = 255, | |
c72a1d60 RP |
28 | }; |
29 | ||
30 | struct led_classdev { | |
fb5035db BD |
31 | const char *name; |
32 | int brightness; | |
33 | int flags; | |
c72a1d60 | 34 | |
fb5035db | 35 | #define LED_SUSPENDED (1 << 0) |
c72a1d60 | 36 | |
fb5035db BD |
37 | /* Set LED brightness level */ |
38 | void (*brightness_set)(struct led_classdev *led_cdev, | |
39 | enum led_brightness brightness); | |
40 | ||
41 | struct class_device *class_dev; | |
42 | struct list_head node; /* LED Device list */ | |
43 | char *default_trigger; /* Trigger to use */ | |
c72a1d60 | 44 | |
c3bc9956 | 45 | #ifdef CONFIG_LEDS_TRIGGERS |
c3bc9956 | 46 | /* Protects the trigger data below */ |
fb5035db | 47 | rwlock_t trigger_lock; |
c3bc9956 | 48 | |
fb5035db BD |
49 | struct led_trigger *trigger; |
50 | struct list_head trig_list; | |
51 | void *trigger_data; | |
c3bc9956 | 52 | #endif |
c72a1d60 RP |
53 | }; |
54 | ||
55 | extern int led_classdev_register(struct device *parent, | |
fb5035db | 56 | struct led_classdev *led_cdev); |
c72a1d60 RP |
57 | extern void led_classdev_unregister(struct led_classdev *led_cdev); |
58 | extern void led_classdev_suspend(struct led_classdev *led_cdev); | |
59 | extern void led_classdev_resume(struct led_classdev *led_cdev); | |
60 | ||
c3bc9956 RP |
61 | /* |
62 | * LED Triggers | |
63 | */ | |
64 | #ifdef CONFIG_LEDS_TRIGGERS | |
65 | ||
66 | #define TRIG_NAME_MAX 50 | |
67 | ||
68 | struct led_trigger { | |
69 | /* Trigger Properties */ | |
fb5035db BD |
70 | const char *name; |
71 | void (*activate)(struct led_classdev *led_cdev); | |
72 | void (*deactivate)(struct led_classdev *led_cdev); | |
c3bc9956 RP |
73 | |
74 | /* LEDs under control by this trigger (for simple triggers) */ | |
fb5035db BD |
75 | rwlock_t leddev_list_lock; |
76 | struct list_head led_cdevs; | |
c3bc9956 RP |
77 | |
78 | /* Link to next registered trigger */ | |
fb5035db | 79 | struct list_head next_trig; |
c3bc9956 RP |
80 | }; |
81 | ||
82 | /* Registration functions for complex triggers */ | |
83 | extern int led_trigger_register(struct led_trigger *trigger); | |
84 | extern void led_trigger_unregister(struct led_trigger *trigger); | |
85 | ||
86 | /* Registration functions for simple triggers */ | |
87 | #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; | |
88 | #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; | |
89 | extern void led_trigger_register_simple(const char *name, | |
90 | struct led_trigger **trigger); | |
91 | extern void led_trigger_unregister_simple(struct led_trigger *trigger); | |
92 | extern void led_trigger_event(struct led_trigger *trigger, | |
93 | enum led_brightness event); | |
94 | ||
95 | #else | |
96 | ||
97 | /* Triggers aren't active - null macros */ | |
98 | #define DEFINE_LED_TRIGGER(x) | |
99 | #define DEFINE_LED_TRIGGER_GLOBAL(x) | |
100 | #define led_trigger_register_simple(x, y) do {} while(0) | |
101 | #define led_trigger_unregister_simple(x) do {} while(0) | |
102 | #define led_trigger_event(x, y) do {} while(0) | |
103 | ||
104 | #endif | |
2bfb646c RP |
105 | |
106 | /* Trigger specific functions */ | |
107 | #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK | |
108 | extern void ledtrig_ide_activity(void); | |
109 | #else | |
110 | #define ledtrig_ide_activity() do {} while(0) | |
111 | #endif | |
112 | ||
c72a1d60 | 113 | #endif /* __LINUX_LEDS_H_INCLUDED */ |