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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 | 15 | #include <linux/list.h> |
df96efd7 | 16 | #include <linux/spinlock.h> |
af410fc1 | 17 | |
c72a1d60 | 18 | struct device; |
c72a1d60 RP |
19 | /* |
20 | * LED Core | |
21 | */ | |
22 | ||
23 | enum led_brightness { | |
fb5035db BD |
24 | LED_OFF = 0, |
25 | LED_HALF = 127, | |
26 | LED_FULL = 255, | |
c72a1d60 RP |
27 | }; |
28 | ||
29 | struct led_classdev { | |
fb5035db BD |
30 | const char *name; |
31 | int brightness; | |
32 | int flags; | |
c72a1d60 | 33 | |
fb5035db | 34 | #define LED_SUSPENDED (1 << 0) |
c72a1d60 | 35 | |
fb5035db BD |
36 | /* Set LED brightness level */ |
37 | void (*brightness_set)(struct led_classdev *led_cdev, | |
38 | enum led_brightness brightness); | |
39 | ||
f8a7c6fe | 40 | struct device *dev; |
fb5035db BD |
41 | struct list_head node; /* LED Device list */ |
42 | char *default_trigger; /* Trigger to use */ | |
c72a1d60 | 43 | |
c3bc9956 | 44 | #ifdef CONFIG_LEDS_TRIGGERS |
c3bc9956 | 45 | /* Protects the trigger data below */ |
fb5035db | 46 | rwlock_t trigger_lock; |
c3bc9956 | 47 | |
fb5035db BD |
48 | struct led_trigger *trigger; |
49 | struct list_head trig_list; | |
50 | void *trigger_data; | |
c3bc9956 | 51 | #endif |
c72a1d60 RP |
52 | }; |
53 | ||
54 | extern int led_classdev_register(struct device *parent, | |
fb5035db | 55 | struct led_classdev *led_cdev); |
c72a1d60 RP |
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 | ||
c3bc9956 RP |
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 */ | |
fb5035db BD |
69 | const char *name; |
70 | void (*activate)(struct led_classdev *led_cdev); | |
71 | void (*deactivate)(struct led_classdev *led_cdev); | |
c3bc9956 RP |
72 | |
73 | /* LEDs under control by this trigger (for simple triggers) */ | |
fb5035db BD |
74 | rwlock_t leddev_list_lock; |
75 | struct list_head led_cdevs; | |
c3bc9956 RP |
76 | |
77 | /* Link to next registered trigger */ | |
fb5035db | 78 | struct list_head next_trig; |
c3bc9956 RP |
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 | |
2bfb646c RP |
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 | ||
22e03f3b RA |
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 | ||
c72a1d60 | 126 | #endif /* __LINUX_LEDS_H_INCLUDED */ |