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12#ifndef __LINUX_LEDS_H_INCLUDED
13#define __LINUX_LEDS_H_INCLUDED
14
15#include <linux/list.h>
16#include <linux/spinlock.h>
17#include <linux/rwsem.h>
18#include <linux/timer.h>
19
20struct device;
21
22
23
24
25enum led_brightness {
26 LED_OFF = 0,
27 LED_HALF = 127,
28 LED_FULL = 255,
29};
30
31struct led_classdev {
32 const char *name;
33 int brightness;
34 int max_brightness;
35 int flags;
36
37
38#define LED_SUSPENDED (1 << 0)
39
40#define LED_CORE_SUSPENDRESUME (1 << 16)
41
42
43
44 void (*brightness_set)(struct led_classdev *led_cdev,
45 enum led_brightness brightness);
46
47 enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
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56
57 int (*blink_set)(struct led_classdev *led_cdev,
58 unsigned long *delay_on,
59 unsigned long *delay_off);
60
61 struct device *dev;
62 struct list_head node;
63 const char *default_trigger;
64
65 unsigned long blink_delay_on, blink_delay_off;
66 struct timer_list blink_timer;
67 int blink_brightness;
68
69#ifdef CONFIG_LEDS_TRIGGERS
70
71 struct rw_semaphore trigger_lock;
72
73 struct led_trigger *trigger;
74 struct list_head trig_list;
75 void *trigger_data;
76#endif
77};
78
79extern int led_classdev_register(struct device *parent,
80 struct led_classdev *led_cdev);
81extern void led_classdev_unregister(struct led_classdev *led_cdev);
82extern void led_classdev_suspend(struct led_classdev *led_cdev);
83extern void led_classdev_resume(struct led_classdev *led_cdev);
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100extern void led_blink_set(struct led_classdev *led_cdev,
101 unsigned long *delay_on,
102 unsigned long *delay_off);
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111
112extern void led_brightness_set(struct led_classdev *led_cdev,
113 enum led_brightness brightness);
114
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116
117
118#ifdef CONFIG_LEDS_TRIGGERS
119
120#define TRIG_NAME_MAX 50
121
122struct led_trigger {
123
124 const char *name;
125 void (*activate)(struct led_classdev *led_cdev);
126 void (*deactivate)(struct led_classdev *led_cdev);
127
128
129 rwlock_t leddev_list_lock;
130 struct list_head led_cdevs;
131
132
133 struct list_head next_trig;
134};
135
136
137extern int led_trigger_register(struct led_trigger *trigger);
138extern void led_trigger_unregister(struct led_trigger *trigger);
139
140
141#define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
142#define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x;
143extern void led_trigger_register_simple(const char *name,
144 struct led_trigger **trigger);
145extern void led_trigger_unregister_simple(struct led_trigger *trigger);
146extern void led_trigger_event(struct led_trigger *trigger,
147 enum led_brightness event);
148extern void led_trigger_blink(struct led_trigger *trigger,
149 unsigned long *delay_on,
150 unsigned long *delay_off);
151
152#else
153
154
155#define DEFINE_LED_TRIGGER(x)
156#define DEFINE_LED_TRIGGER_GLOBAL(x)
157#define led_trigger_register_simple(x, y) do {} while(0)
158#define led_trigger_unregister_simple(x) do {} while(0)
159#define led_trigger_event(x, y) do {} while(0)
160
161#endif
162
163
164#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
165extern void ledtrig_ide_activity(void);
166#else
167#define ledtrig_ide_activity() do {} while(0)
168#endif
169
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171
172
173struct led_info {
174 const char *name;
175 const char *default_trigger;
176 int flags;
177};
178
179struct led_platform_data {
180 int num_leds;
181 struct led_info *leds;
182};
183
184
185struct gpio_led {
186 const char *name;
187 const char *default_trigger;
188 unsigned gpio;
189 unsigned active_low : 1;
190 unsigned retain_state_suspended : 1;
191 unsigned default_state : 2;
192
193};
194#define LEDS_GPIO_DEFSTATE_OFF 0
195#define LEDS_GPIO_DEFSTATE_ON 1
196#define LEDS_GPIO_DEFSTATE_KEEP 2
197
198struct gpio_led_platform_data {
199 int num_leds;
200 const struct gpio_led *leds;
201
202#define GPIO_LED_NO_BLINK_LOW 0
203#define GPIO_LED_NO_BLINK_HIGH 1
204#define GPIO_LED_BLINK 2
205 int (*gpio_blink_set)(unsigned gpio, int state,
206 unsigned long *delay_on,
207 unsigned long *delay_off);
208};
209
210
211#endif
212