summaryrefslogtreecommitdiff
path: root/include/linux/leds.h
blob: 6300313c46b79957a2febfc5a312eab8d7fd9a05 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Driver model for leds and led triggers
 *
 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
 * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
 */
#ifndef __LINUX_LEDS_H_INCLUDED
#define __LINUX_LEDS_H_INCLUDED

#include <dt-bindings/leds/common.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

struct attribute_group;
struct device_node;
struct fwnode_handle;
struct gpio_desc;
struct kernfs_node;
struct led_pattern;
struct platform_device;

/*
 * LED Core
 */

/* This is obsolete/useless. We now support variable maximum brightness. */
enum led_brightness {
	LED_OFF		= 0,
	LED_ON		= 1,
	LED_HALF	= 127,
	LED_FULL	= 255,
};

enum led_default_state {
	LEDS_DEFSTATE_OFF	= 0,
	LEDS_DEFSTATE_ON	= 1,
	LEDS_DEFSTATE_KEEP	= 2,
};

/**
 * struct led_lookup_data - represents a single LED lookup entry
 *
 * @list: internal list of all LED lookup entries
 * @provider: name of led_classdev providing the LED
 * @dev_id: name of the device associated with this LED
 * @con_id: name of the LED from the device's point of view
 */
struct led_lookup_data {
	struct list_head list;
	const char *provider;
	const char *dev_id;
	const char *con_id;
};

struct led_init_data {
	/* device fwnode handle */
	struct fwnode_handle *fwnode;
	/*
	 * default <color:function> tuple, for backward compatibility
	 * with in-driver hard-coded LED names used as a fallback when
	 * DT "label" property is absent; it should be set to NULL
	 * in new LED class drivers.
	 */
	const char *default_label;
	/*
	 * string to be used for devicename section of LED class device
	 * either for label based LED name composition path or for fwnode
	 * based when devname_mandatory is true
	 */
	const char *devicename;
	/*
	 * indicates if LED name should always comprise devicename section;
	 * only LEDs exposed by drivers of hot-pluggable devices should
	 * set it to true
	 */
	bool devname_mandatory;
};

enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode);

struct led_hw_trigger_type {
	int dummy;
};

struct led_classdev {
	const char		*name;
	unsigned int brightness;
	unsigned int max_brightness;
	unsigned int color;
	int			 flags;

	/* Lower 16 bits reflect status */
#define LED_SUSPENDED		BIT(0)
#define LED_UNREGISTERING	BIT(1)
	/* Upper 16 bits reflect control information */
#define LED_CORE_SUSPENDRESUME	BIT(16)
#define LED_SYSFS_DISABLE	BIT(17)
#define LED_DEV_CAP_FLASH	BIT(18)
#define LED_HW_PLUGGABLE	BIT(19)
#define LED_PANIC_INDICATOR	BIT(20)
#define LED_BRIGHT_HW_CHANGED	BIT(21)
#define LED_RETAIN_AT_SHUTDOWN	BIT(22)
#define LED_INIT_DEFAULT_TRIGGER BIT(23)

	/* set_brightness_work / blink_timer flags, atomic, private. */
	unsigned long		work_flags;

#define LED_BLINK_SW			0
#define LED_BLINK_ONESHOT		1
#define LED_BLINK_ONESHOT_STOP		2
#define LED_BLINK_INVERT		3
#define LED_BLINK_BRIGHTNESS_CHANGE 	4
#define LED_BLINK_DISABLE		5
	/* Brightness off also disables hw-blinking so it is a separate action */
#define LED_SET_BRIGHTNESS_OFF		6
#define LED_SET_BRIGHTNESS		7
#define LED_SET_BLINK			8

	/* Set LED brightness level
	 * Must not sleep. Use brightness_set_blocking for drivers
	 * that can sleep while setting brightness.
	 */
	void		(*brightness_set)(struct led_classdev *led_cdev,
					  enum led_brightness brightness);
	/*
	 * Set LED brightness level immediately - it can block the caller for
	 * the time required for accessing a LED device register.
	 */
	int (*brightness_set_blocking)(struct led_classdev *led_cdev,
				       enum led_brightness brightness);
	/* Get LED brightness level */
	enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);

	/*
	 * Activate hardware accelerated blink, delays are in milliseconds
	 * and if both are zero then a sensible default should be chosen.
	 * The call should adjust the timings in that case and if it can't
	 * match the values specified exactly.
	 * Deactivate blinking again when the brightness is set to LED_OFF
	 * via the brightness_set() callback.
	 * For led_blink_set_nosleep() the LED core assumes that blink_set
	 * implementations, of drivers which do not use brightness_set_blocking,
	 * will not sleep. Therefor if brightness_set_blocking is not set
	 * this function must not sleep!
	 */
	int		(*blink_set)(struct led_classdev *led_cdev,
				     unsigned long *delay_on,
				     unsigned long *delay_off);

	int (*pattern_set)(struct led_classdev *led_cdev,
			   struct led_pattern *pattern, u32 len, int repeat);
	int (*pattern_clear)(struct led_classdev *led_cdev);

	struct device		*dev;
	const struct attribute_group	**groups;

	struct list_head	 node;			/* LED Device list */
	const char		*default_trigger;	/* Trigger to use */

	unsigned long		 blink_delay_on, blink_delay_off;
	struct timer_list	 blink_timer;
	int			 blink_brightness;
	int			 new_blink_brightness;
	void			(*flash_resume)(struct led_classdev *led_cdev);

	struct work_struct	set_brightness_work;
	int			delayed_set_value;
	unsigned long		delayed_delay_on;
	unsigned long		delayed_delay_off;

#ifdef CONFIG_LEDS_TRIGGERS
	/* Protects the trigger data below */
	struct rw_semaphore	 trigger_lock;

	struct led_trigger	*trigger;
	struct list_head	 trig_list;
	void			*trigger_data;
	/* true if activated - deactivate routine uses it to do cleanup */
	bool			activated;

	/* LEDs that have private triggers have this set */
	struct led_hw_trigger_type	*trigger_type;

	/* Unique trigger name supported by LED set in hw control mode */
	const char		*hw_control_trigger;
	/*
	 * Check if the LED driver supports the requested mode provided by the
	 * defined supported trigger to setup the LED to hw control mode.
	 *
	 * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not
	 * supported and software fallback needs to be used.
	 * Return a negative error number on any other case  for check fail due
	 * to various reason like device not ready or timeouts.
	 */
	int			(*hw_control_is_supported)(struct led_classdev *led_cdev,
							   unsigned long flags);
	/*
	 * Activate hardware control, LED driver will use the provided flags
	 * from the supported trigger and setup the LED to be driven by hardware
	 * following the requested mode from the trigger flags.
	 * Deactivate hardware blink control by setting brightness to LED_OFF via
	 * the brightness_set() callback.
	 *
	 * Return 0 on success, a negative error number on flags apply fail.
	 */
	int			(*hw_control_set)(struct led_classdev *led_cdev,
						  unsigned long flags);
	/*
	 * Get from the LED driver the current mode that the LED is set in hw
	 * control mode and put them in flags.
	 * Trigger can use this to get the initial state of a LED already set in
	 * hardware blink control.
	 *
	 * Return 0 on success, a negative error number on failing parsing the
	 * initial mode. Error from this function is NOT FATAL as the device
	 * may be in a not supported initial state by the attached LED trigger.
	 */
	int			(*hw_control_get)(struct led_classdev *led_cdev,
						  unsigned long *flags);
	/*
	 * Get the device this LED blinks in response to.
	 * e.g. for a PHY LED, it is the network device. If the LED is
	 * not yet associated to a device, return NULL.
	 */
	struct device		*(*hw_control_get_device)(struct led_classdev *led_cdev);
#endif

#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
	int			 brightness_hw_changed;
	struct kernfs_node	*brightness_hw_changed_kn;
#endif

	/* Ensures consistent access to the LED Flash Class device */
	struct mutex		led_access;
};

/**
 * led_classdev_register_ext - register a new object of LED class with
 *			       init data
 * @parent: LED controller device this LED is driven by
 * @led_cdev: the led_classdev structure for this device
 * @init_data: the LED class device initialization data
 *
 * Register a new object of LED class, with name derived from init_data.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_classdev_register_ext(struct device *parent,
				     struct led_classdev *led_cdev,
				     struct led_init_data *init_data);

/**
 * led_classdev_register - register a new object of LED class
 * @parent: LED controller device this LED is driven by
 * @led_cdev: the led_classdev structure for this device
 *
 * Register a new object of LED class, with name derived from the name property
 * of passed led_cdev argument.
 *
 * Returns: 0 on success or negative error value on failure
 */
static inline int led_classdev_register(struct device *parent,
					struct led_classdev *led_cdev)
{
	return led_classdev_register_ext(parent, led_cdev, NULL);
}

int devm_led_classdev_register_ext(struct device *parent,
					  struct led_classdev *led_cdev,
					  struct led_init_data *init_data);
static inline int devm_led_classdev_register(struct device *parent,
					     struct led_classdev *led_cdev)
{
	return devm_led_classdev_register_ext(parent, led_cdev, NULL);
}
void led_classdev_unregister(struct led_classdev *led_cdev);
void devm_led_classdev_unregister(struct device *parent,
				  struct led_classdev *led_cdev);
void led_classdev_suspend(struct led_classdev *led_cdev);
void led_classdev_resume(struct led_classdev *led_cdev);

void led_add_lookup(struct led_lookup_data *led_lookup);
void led_remove_lookup(struct led_lookup_data *led_lookup);

struct led_classdev *__must_check led_get(struct device *dev, char *con_id);
struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id);

extern struct led_classdev *of_led_get(struct device_node *np, int index);
extern void led_put(struct led_classdev *led_cdev);
struct led_classdev *__must_check devm_of_led_get(struct device *dev,
						  int index);
struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev,
						  int index);

/**
 * led_blink_set - set blinking with software fallback
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 *
 * This function makes the LED blink, attempting to use the
 * hardware acceleration if possible, but falling back to
 * software blinking if there is no hardware blinking or if
 * the LED refuses the passed values.
 *
 * This function may sleep!
 *
 * Note that if software blinking is active, simply calling
 * led_cdev->brightness_set() will not stop the blinking,
 * use led_set_brightness() instead.
 */
void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
		   unsigned long *delay_off);

/**
 * led_blink_set_nosleep - set blinking, guaranteed to not sleep
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 *
 * This function makes the LED blink and is guaranteed to not sleep. Otherwise
 * this is the same as led_blink_set(), see led_blink_set() for details.
 */
void led_blink_set_nosleep(struct led_classdev *led_cdev, unsigned long delay_on,
			   unsigned long delay_off);

/**
 * led_blink_set_oneshot - do a oneshot software blink
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 * @invert: blink off, then on, leaving the led on
 *
 * This function makes the LED blink one time for delay_on +
 * delay_off time, ignoring the request if another one-shot
 * blink is already in progress.
 *
 * If invert is set, led blinks for delay_off first, then for
 * delay_on and leave the led on after the on-off cycle.
 *
 * This function is guaranteed not to sleep.
 */
void led_blink_set_oneshot(struct led_classdev *led_cdev,
			   unsigned long *delay_on, unsigned long *delay_off,
			   int invert);
/**
 * led_set_brightness - set LED brightness
 * @led_cdev: the LED to set
 * @brightness: the brightness to set it to
 *
 * Set an LED's brightness, and, if necessary, cancel the
 * software blink timer that implements blinking when the
 * hardware doesn't. This function is guaranteed not to sleep.
 */
void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness);

/**
 * led_set_brightness_sync - set LED brightness synchronously
 * @led_cdev: the LED to set
 * @value: the brightness to set it to
 *
 * Set an LED's brightness immediately. This function will block
 * the caller for the time required for accessing device registers,
 * and it can sleep.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value);

/**
 * led_update_brightness - update LED brightness
 * @led_cdev: the LED to query
 *
 * Get an LED's current brightness and update led_cdev->brightness
 * member with the obtained value.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_update_brightness(struct led_classdev *led_cdev);

/**
 * led_get_default_pattern - return default pattern
 *
 * @led_cdev: the LED to get default pattern for
 * @size:     pointer for storing the number of elements in returned array,
 *            modified only if return != NULL
 *
 * Return:    Allocated array of integers with default pattern from device tree
 *            or NULL.  Caller is responsible for kfree().
 */
u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size);

/**
 * led_sysfs_disable - disable LED sysfs interface
 * @led_cdev: the LED to set
 *
 * Disable the led_cdev's sysfs interface.
 */
void led_sysfs_disable(struct led_classdev *led_cdev);

/**
 * led_sysfs_enable - enable LED sysfs interface
 * @led_cdev: the LED to set
 *
 * Enable the led_cdev's sysfs interface.
 */
void led_sysfs_enable(struct led_classdev *led_cdev);

/**
 * led_compose_name - compose LED class device name
 * @dev: LED controller device object
 * @init_data: the LED class device initialization data
 * @led_classdev_name: composed LED class device name
 *
 * Create LED class device name basing on the provided init_data argument.
 * The name can have <devicename:color:function> or <color:function>.
 * form, depending on the init_data configuration.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_compose_name(struct device *dev, struct led_init_data *init_data,
		     char *led_classdev_name);

/**
 * led_sysfs_is_disabled - check if LED sysfs interface is disabled
 * @led_cdev: the LED to query
 *
 * Returns: true if the led_cdev's sysfs interface is disabled.
 */
static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
{
	return led_cdev->flags & LED_SYSFS_DISABLE;
}

/*
 * LED Triggers
 */
/* Registration functions for simple triggers */
#define DEFINE_LED_TRIGGER(x)		static struct led_trigger *x;
#define DEFINE_LED_TRIGGER_GLOBAL(x)	struct led_trigger *x;

#ifdef CONFIG_LEDS_TRIGGERS

#define TRIG_NAME_MAX 50

struct led_trigger {
	/* Trigger Properties */
	const char	 *name;
	int		(*activate)(struct led_classdev *led_cdev);
	void		(*deactivate)(struct led_classdev *led_cdev);

	/* Brightness set by led_trigger_event */
	enum led_brightness brightness;

	/* LED-private triggers have this set */
	struct led_hw_trigger_type *trigger_type;

	/* LEDs under control by this trigger (for simple triggers) */
	spinlock_t	  leddev_list_lock;
	struct list_head  led_cdevs;

	/* Link to next registered trigger */
	struct list_head  next_trig;

	const struct attribute_group **groups;
};

/*
 * Currently the attributes in struct led_trigger::groups are added directly to
 * the LED device. As this might change in the future, the following
 * macros abstract getting the LED device and its trigger_data from the dev
 * parameter passed to the attribute accessor functions.
 */
#define led_trigger_get_led(dev)	((struct led_classdev *)dev_get_drvdata((dev)))
#define led_trigger_get_drvdata(dev)	(led_get_trigger_data(led_trigger_get_led(dev)))

/* Registration functions for complex triggers */
int led_trigger_register(struct led_trigger *trigger);
void led_trigger_unregister(struct led_trigger *trigger);
int devm_led_trigger_register(struct device *dev,
				     struct led_trigger *trigger);

void led_trigger_register_simple(const char *name,
				struct led_trigger **trigger);
void led_trigger_unregister_simple(struct led_trigger *trigger);
void led_trigger_event(struct led_trigger *trigger,  enum led_brightness event);
void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on,
		       unsigned long delay_off);
void led_trigger_blink_oneshot(struct led_trigger *trigger,
			       unsigned long delay_on,
			       unsigned long delay_off,
			       int invert);
void led_trigger_set_default(struct led_classdev *led_cdev);
int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger);
void led_trigger_remove(struct led_classdev *led_cdev);

static inline void led_set_trigger_data(struct led_classdev *led_cdev,
					void *trigger_data)
{
	led_cdev->trigger_data = trigger_data;
}

static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
{
	return led_cdev->trigger_data;
}

static inline enum led_brightness
led_trigger_get_brightness(const struct led_trigger *trigger)
{
	return trigger ? trigger->brightness : LED_OFF;
}

#define module_led_trigger(__led_trigger) \
	module_driver(__led_trigger, led_trigger_register, \
		      led_trigger_unregister)

#else

/* Trigger has no members */
struct led_trigger {};

/* Trigger inline empty functions */
static inline void led_trigger_register_simple(const char *name,
					struct led_trigger **trigger) {}
static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
static inline void led_trigger_event(struct led_trigger *trigger,
				enum led_brightness event) {}
static inline void led_trigger_blink(struct led_trigger *trigger,
				      unsigned long delay_on,
				      unsigned long delay_off) {}
static inline void led_trigger_blink_oneshot(struct led_trigger *trigger,
				      unsigned long delay_on,
				      unsigned long delay_off,
				      int invert) {}
static inline void led_trigger_set_default(struct led_classdev *led_cdev) {}
static inline int led_trigger_set(struct led_classdev *led_cdev,
				  struct led_trigger *trigger)
{
	return 0;
}

static inline void led_trigger_remove(struct led_classdev *led_cdev) {}
static inline void led_set_trigger_data(struct led_classdev *led_cdev) {}
static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
{
	return NULL;
}

static inline enum led_brightness
led_trigger_get_brightness(const struct led_trigger *trigger)
{
	return LED_OFF;
}

#endif /* CONFIG_LEDS_TRIGGERS */

/* Trigger specific enum */
enum led_trigger_netdev_modes {
	TRIGGER_NETDEV_LINK = 0,
	TRIGGER_NETDEV_LINK_10,
	TRIGGER_NETDEV_LINK_100,
	TRIGGER_NETDEV_LINK_1000,
	TRIGGER_NETDEV_LINK_2500,
	TRIGGER_NETDEV_LINK_5000,
	TRIGGER_NETDEV_LINK_10000,
	TRIGGER_NETDEV_HALF_DUPLEX,
	TRIGGER_NETDEV_FULL_DUPLEX,
	TRIGGER_NETDEV_TX,
	TRIGGER_NETDEV_RX,

	/* Keep last */
	__TRIGGER_NETDEV_MAX,
};

/* Trigger specific functions */
#ifdef CONFIG_LEDS_TRIGGER_DISK
void ledtrig_disk_activity(bool write);
#else
static inline void ledtrig_disk_activity(bool write) {}
#endif

#ifdef CONFIG_LEDS_TRIGGER_MTD
void ledtrig_mtd_activity(void);
#else
static inline void ledtrig_mtd_activity(void) {}
#endif

#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
void ledtrig_flash_ctrl(bool on);
void ledtrig_torch_ctrl(bool on);
#else
static inline void ledtrig_flash_ctrl(bool on) {}
static inline void ledtrig_torch_ctrl(bool on) {}
#endif

/*
 * Generic LED platform data for describing LED names and default triggers.
 */
struct led_info {
	const char	*name;
	const char	*default_trigger;
	int		flags;
};

struct led_platform_data {
	int		num_leds;
	struct led_info	*leds;
};

struct led_properties {
	u32		color;
	bool		color_present;
	const char	*function;
	u32		func_enum;
	bool		func_enum_present;
	const char	*label;
};

typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state,
				unsigned long *delay_on,
				unsigned long *delay_off);

/* For the leds-gpio driver */
struct gpio_led {
	const char *name;
	const char *default_trigger;
	unsigned 	gpio;
	unsigned	active_low : 1;
	unsigned	retain_state_suspended : 1;
	unsigned	panic_indicator : 1;
	unsigned	default_state : 2;
	unsigned	retain_state_shutdown : 1;
	/* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
	struct gpio_desc *gpiod;
};
#define LEDS_GPIO_DEFSTATE_OFF		LEDS_DEFSTATE_OFF
#define LEDS_GPIO_DEFSTATE_ON		LEDS_DEFSTATE_ON
#define LEDS_GPIO_DEFSTATE_KEEP		LEDS_DEFSTATE_KEEP

struct gpio_led_platform_data {
	int 		num_leds;
	const struct gpio_led *leds;

#define GPIO_LED_NO_BLINK_LOW	0	/* No blink GPIO state low */
#define GPIO_LED_NO_BLINK_HIGH	1	/* No blink GPIO state high */
#define GPIO_LED_BLINK		2	/* Please, blink */
	gpio_blink_set_t	gpio_blink_set;
};

#ifdef CONFIG_LEDS_GPIO_REGISTER
struct platform_device *gpio_led_register_device(
		int id, const struct gpio_led_platform_data *pdata);
#else
static inline struct platform_device *gpio_led_register_device(
		int id, const struct gpio_led_platform_data *pdata)
{
	return 0;
}
#endif

enum cpu_led_event {
	CPU_LED_IDLE_START,	/* CPU enters idle */
	CPU_LED_IDLE_END,	/* CPU idle ends */
	CPU_LED_START,		/* Machine starts, especially resume */
	CPU_LED_STOP,		/* Machine stops, especially suspend */
	CPU_LED_HALTED,		/* Machine shutdown */
};
#ifdef CONFIG_LEDS_TRIGGER_CPU
void ledtrig_cpu(enum cpu_led_event evt);
#else
static inline void ledtrig_cpu(enum cpu_led_event evt)
{
	return;
}
#endif

#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
void led_classdev_notify_brightness_hw_changed(
	struct led_classdev *led_cdev, unsigned int brightness);
#else
static inline void led_classdev_notify_brightness_hw_changed(
	struct led_classdev *led_cdev, enum led_brightness brightness) { }
#endif

/**
 * struct led_pattern - pattern interval settings
 * @delta_t: pattern interval delay, in milliseconds
 * @brightness: pattern interval brightness
 */
struct led_pattern {
	u32 delta_t;
	int brightness;
};

enum led_audio {
	LED_AUDIO_MUTE,		/* master mute LED */
	LED_AUDIO_MICMUTE,	/* mic mute LED */
	NUM_AUDIO_LEDS
};

#endif		/* __LINUX_LEDS_H_INCLUDED */