Commit | Line | Data |
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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> |
dc47206e | 17 | #include <linux/rwsem.h> |
af410fc1 | 18 | |
c72a1d60 | 19 | struct device; |
c72a1d60 RP |
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 | |
859cb7f2 | 35 | /* Lower 16 bits reflect status */ |
fb5035db | 36 | #define LED_SUSPENDED (1 << 0) |
859cb7f2 RP |
37 | /* Upper 16 bits reflect control information */ |
38 | #define LED_CORE_SUSPENDRESUME (1 << 16) | |
c72a1d60 | 39 | |
fb5035db | 40 | /* Set LED brightness level */ |
2e214e0f | 41 | /* Must not sleep, use a workqueue if needed */ |
fb5035db BD |
42 | void (*brightness_set)(struct led_classdev *led_cdev, |
43 | enum led_brightness brightness); | |
29d76dfa HMH |
44 | /* Get LED brightness level */ |
45 | enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); | |
fb5035db | 46 | |
4c79141d MN |
47 | /* Activate hardware accelerated blink */ |
48 | int (*blink_set)(struct led_classdev *led_cdev, | |
49 | unsigned long *delay_on, | |
50 | unsigned long *delay_off); | |
51 | ||
f8a7c6fe | 52 | struct device *dev; |
fb5035db | 53 | struct list_head node; /* LED Device list */ |
781a54e7 | 54 | const char *default_trigger; /* Trigger to use */ |
c72a1d60 | 55 | |
c3bc9956 | 56 | #ifdef CONFIG_LEDS_TRIGGERS |
c3bc9956 | 57 | /* Protects the trigger data below */ |
dc47206e | 58 | struct rw_semaphore trigger_lock; |
c3bc9956 | 59 | |
fb5035db BD |
60 | struct led_trigger *trigger; |
61 | struct list_head trig_list; | |
62 | void *trigger_data; | |
c3bc9956 | 63 | #endif |
c72a1d60 RP |
64 | }; |
65 | ||
66 | extern int led_classdev_register(struct device *parent, | |
fb5035db | 67 | struct led_classdev *led_cdev); |
e2387d6c | 68 | extern void led_classdev_unregister(struct led_classdev *led_cdev); |
c72a1d60 RP |
69 | extern void led_classdev_suspend(struct led_classdev *led_cdev); |
70 | extern void led_classdev_resume(struct led_classdev *led_cdev); | |
71 | ||
c3bc9956 RP |
72 | /* |
73 | * LED Triggers | |
74 | */ | |
75 | #ifdef CONFIG_LEDS_TRIGGERS | |
76 | ||
77 | #define TRIG_NAME_MAX 50 | |
78 | ||
79 | struct led_trigger { | |
80 | /* Trigger Properties */ | |
fb5035db BD |
81 | const char *name; |
82 | void (*activate)(struct led_classdev *led_cdev); | |
83 | void (*deactivate)(struct led_classdev *led_cdev); | |
c3bc9956 RP |
84 | |
85 | /* LEDs under control by this trigger (for simple triggers) */ | |
fb5035db BD |
86 | rwlock_t leddev_list_lock; |
87 | struct list_head led_cdevs; | |
c3bc9956 RP |
88 | |
89 | /* Link to next registered trigger */ | |
fb5035db | 90 | struct list_head next_trig; |
c3bc9956 RP |
91 | }; |
92 | ||
93 | /* Registration functions for complex triggers */ | |
94 | extern int led_trigger_register(struct led_trigger *trigger); | |
95 | extern void led_trigger_unregister(struct led_trigger *trigger); | |
96 | ||
97 | /* Registration functions for simple triggers */ | |
98 | #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; | |
99 | #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; | |
100 | extern void led_trigger_register_simple(const char *name, | |
101 | struct led_trigger **trigger); | |
102 | extern void led_trigger_unregister_simple(struct led_trigger *trigger); | |
103 | extern void led_trigger_event(struct led_trigger *trigger, | |
104 | enum led_brightness event); | |
105 | ||
106 | #else | |
107 | ||
108 | /* Triggers aren't active - null macros */ | |
109 | #define DEFINE_LED_TRIGGER(x) | |
110 | #define DEFINE_LED_TRIGGER_GLOBAL(x) | |
111 | #define led_trigger_register_simple(x, y) do {} while(0) | |
112 | #define led_trigger_unregister_simple(x) do {} while(0) | |
113 | #define led_trigger_event(x, y) do {} while(0) | |
114 | ||
115 | #endif | |
2bfb646c RP |
116 | |
117 | /* Trigger specific functions */ | |
118 | #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK | |
119 | extern void ledtrig_ide_activity(void); | |
120 | #else | |
121 | #define ledtrig_ide_activity() do {} while(0) | |
122 | #endif | |
123 | ||
f46e9203 NC |
124 | /* |
125 | * Generic LED platform data for describing LED names and default triggers. | |
126 | */ | |
127 | struct led_info { | |
128 | const char *name; | |
326bb8a5 | 129 | const char *default_trigger; |
f46e9203 NC |
130 | int flags; |
131 | }; | |
132 | ||
133 | struct led_platform_data { | |
134 | int num_leds; | |
135 | struct led_info *leds; | |
136 | }; | |
137 | ||
22e03f3b RA |
138 | /* For the leds-gpio driver */ |
139 | struct gpio_led { | |
140 | const char *name; | |
326bb8a5 | 141 | const char *default_trigger; |
22e03f3b RA |
142 | unsigned gpio; |
143 | u8 active_low; | |
144 | }; | |
145 | ||
146 | struct gpio_led_platform_data { | |
147 | int num_leds; | |
148 | struct gpio_led *leds; | |
ca3259b3 HVR |
149 | int (*gpio_blink_set)(unsigned gpio, |
150 | unsigned long *delay_on, | |
151 | unsigned long *delay_off); | |
22e03f3b RA |
152 | }; |
153 | ||
154 | ||
c72a1d60 | 155 | #endif /* __LINUX_LEDS_H_INCLUDED */ |