1
2
3
4
5
6
7
8
9
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#include <linux/rwsem.h>
18#include <linux/timer.h>
19#include <linux/workqueue.h>
20
21struct device;
22
23
24
25
26enum led_brightness {
27 LED_OFF = 0,
28 LED_HALF = 127,
29 LED_FULL = 255,
30};
31
32struct led_classdev {
33 const char *name;
34 int brightness;
35 int max_brightness;
36 int flags;
37
38
39#define LED_SUSPENDED (1 << 0)
40
41#define LED_CORE_SUSPENDRESUME (1 << 16)
42#define LED_BLINK_ONESHOT (1 << 17)
43#define LED_BLINK_ONESHOT_STOP (1 << 18)
44#define LED_BLINK_INVERT (1 << 19)
45
46
47
48 void (*brightness_set)(struct led_classdev *led_cdev,
49 enum led_brightness brightness);
50
51 enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
52
53
54
55
56
57
58
59
60
61 int (*blink_set)(struct led_classdev *led_cdev,
62 unsigned long *delay_on,
63 unsigned long *delay_off);
64
65 struct device *dev;
66 struct list_head node;
67 const char *default_trigger;
68
69 unsigned long blink_delay_on, blink_delay_off;
70 struct timer_list blink_timer;
71 int blink_brightness;
72
73 struct work_struct set_brightness_work;
74 int delayed_set_value;
75
76#ifdef CONFIG_LEDS_TRIGGERS
77
78 struct rw_semaphore trigger_lock;
79
80 struct led_trigger *trigger;
81 struct list_head trig_list;
82 void *trigger_data;
83
84 bool activated;
85#endif
86};
87
88extern int led_classdev_register(struct device *parent,
89 struct led_classdev *led_cdev);
90extern void led_classdev_unregister(struct led_classdev *led_cdev);
91extern void led_classdev_suspend(struct led_classdev *led_cdev);
92extern void led_classdev_resume(struct led_classdev *led_cdev);
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109extern void led_blink_set(struct led_classdev *led_cdev,
110 unsigned long *delay_on,
111 unsigned long *delay_off);
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126extern void led_blink_set_oneshot(struct led_classdev *led_cdev,
127 unsigned long *delay_on,
128 unsigned long *delay_off,
129 int invert);
130
131
132
133
134
135
136
137
138
139extern void led_set_brightness(struct led_classdev *led_cdev,
140 enum led_brightness brightness);
141
142
143
144
145
146#define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
147#define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x;
148
149#ifdef CONFIG_LEDS_TRIGGERS
150
151#define TRIG_NAME_MAX 50
152
153struct led_trigger {
154
155 const char *name;
156 void (*activate)(struct led_classdev *led_cdev);
157 void (*deactivate)(struct led_classdev *led_cdev);
158
159
160 rwlock_t leddev_list_lock;
161 struct list_head led_cdevs;
162
163
164 struct list_head next_trig;
165};
166
167
168extern int led_trigger_register(struct led_trigger *trigger);
169extern void led_trigger_unregister(struct led_trigger *trigger);
170
171extern void led_trigger_register_simple(const char *name,
172 struct led_trigger **trigger);
173extern void led_trigger_unregister_simple(struct led_trigger *trigger);
174extern void led_trigger_event(struct led_trigger *trigger,
175 enum led_brightness event);
176extern void led_trigger_blink(struct led_trigger *trigger,
177 unsigned long *delay_on,
178 unsigned long *delay_off);
179extern void led_trigger_blink_oneshot(struct led_trigger *trigger,
180 unsigned long *delay_on,
181 unsigned long *delay_off,
182 int invert);
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198extern void led_trigger_rename_static(const char *name,
199 struct led_trigger *trig);
200
201#else
202
203
204struct led_trigger {};
205
206
207static inline void led_trigger_register_simple(const char *name,
208 struct led_trigger **trigger) {}
209static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
210static inline void led_trigger_event(struct led_trigger *trigger,
211 enum led_brightness event) {}
212#endif
213
214
215#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
216extern void ledtrig_ide_activity(void);
217#else
218static inline void ledtrig_ide_activity(void) {}
219#endif
220
221#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
222extern void ledtrig_flash_ctrl(bool on);
223extern void ledtrig_torch_ctrl(bool on);
224#else
225static inline void ledtrig_flash_ctrl(bool on) {}
226static inline void ledtrig_torch_ctrl(bool on) {}
227#endif
228
229
230
231
232struct led_info {
233 const char *name;
234 const char *default_trigger;
235 int flags;
236};
237
238struct led_platform_data {
239 int num_leds;
240 struct led_info *leds;
241};
242
243
244struct gpio_led {
245 const char *name;
246 const char *default_trigger;
247 unsigned gpio;
248 unsigned active_low : 1;
249 unsigned retain_state_suspended : 1;
250 unsigned default_state : 2;
251
252};
253#define LEDS_GPIO_DEFSTATE_OFF 0
254#define LEDS_GPIO_DEFSTATE_ON 1
255#define LEDS_GPIO_DEFSTATE_KEEP 2
256
257struct gpio_led_platform_data {
258 int num_leds;
259 const struct gpio_led *leds;
260
261#define GPIO_LED_NO_BLINK_LOW 0
262#define GPIO_LED_NO_BLINK_HIGH 1
263#define GPIO_LED_BLINK 2
264 int (*gpio_blink_set)(unsigned gpio, int state,
265 unsigned long *delay_on,
266 unsigned long *delay_off);
267};
268
269struct platform_device *gpio_led_register_device(
270 int id, const struct gpio_led_platform_data *pdata);
271
272enum cpu_led_event {
273 CPU_LED_IDLE_START,
274 CPU_LED_IDLE_END,
275 CPU_LED_START,
276 CPU_LED_STOP,
277 CPU_LED_HALTED,
278};
279#ifdef CONFIG_LEDS_TRIGGER_CPU
280extern void ledtrig_cpu(enum cpu_led_event evt);
281#else
282static inline void ledtrig_cpu(enum cpu_led_event evt)
283{
284 return;
285}
286#endif
287
288#endif
289