[mirror_ubuntu-zesty-kernel.git] / drivers / leds / led-triggers.c

/*
 * LED Triggers Core
 *
 * Copyright 2005-2007 Openedhand Ltd.
 *
 * Author: Richard Purdie <rpurdie@openedhand.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/timer.h>
#include <linux/rwsem.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include "leds.h"

/*
 * Nests outside led_cdev->trigger_lock
 */
static DECLARE_RWSEM(triggers_list_lock);
LIST_HEAD(trigger_list);

 /* Used by LED Class */

ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_trigger *trig;
	int ret = count;

	mutex_lock(&led_cdev->led_access);

	if (led_sysfs_is_disabled(led_cdev)) {
		ret = -EBUSY;
		goto unlock;
	}

	if (sysfs_streq(buf, "none")) {
		led_trigger_remove(led_cdev);
		goto unlock;
	}

	down_read(&triggers_list_lock);
	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (sysfs_streq(buf, trig->name)) {
			down_write(&led_cdev->trigger_lock);
			led_trigger_set(led_cdev, trig);
			up_write(&led_cdev->trigger_lock);

			up_read(&triggers_list_lock);
			goto unlock;
		}
	}
	/* we come here only if buf matches no trigger */
	ret = -EINVAL;
	up_read(&triggers_list_lock);

unlock:
	mutex_unlock(&led_cdev->led_access);
	return ret;
}
EXPORT_SYMBOL_GPL(led_trigger_store);

ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_trigger *trig;
	int len = 0;

	down_read(&triggers_list_lock);
	down_read(&led_cdev->trigger_lock);

	if (!led_cdev->trigger)
		len += sprintf(buf+len, "[none] ");
	else
		len += sprintf(buf+len, "none ");

	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (led_cdev->trigger && !strcmp(led_cdev->trigger->name,
							trig->name))
			len += sprintf(buf+len, "[%s] ", trig->name);
		else
			len += sprintf(buf+len, "%s ", trig->name);
	}
	up_read(&led_cdev->trigger_lock);
	up_read(&triggers_list_lock);

	len += sprintf(len+buf, "\n");
	return len;
}
EXPORT_SYMBOL_GPL(led_trigger_show);

/* Caller must ensure led_cdev->trigger_lock held */
void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
{
	unsigned long flags;
	char *event = NULL;
	char *envp[2];
	const char *name;

	name = trig ? trig->name : "none";
	event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);

	/* Remove any existing trigger */
	if (led_cdev->trigger) {
		write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
		list_del(&led_cdev->trig_list);
		write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
			flags);
		cancel_work_sync(&led_cdev->set_brightness_work);
		led_stop_software_blink(led_cdev);
		if (led_cdev->trigger->deactivate)
			led_cdev->trigger->deactivate(led_cdev);
		led_cdev->trigger = NULL;
		led_set_brightness(led_cdev, LED_OFF);
	}
	if (trig) {
		write_lock_irqsave(&trig->leddev_list_lock, flags);
		list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
		write_unlock_irqrestore(&trig->leddev_list_lock, flags);
		led_cdev->trigger = trig;
		if (trig->activate)
			trig->activate(led_cdev);
	}

	if (event) {
		envp[0] = event;
		envp[1] = NULL;
		kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
		kfree(event);
	}
}
EXPORT_SYMBOL_GPL(led_trigger_set);

void led_trigger_remove(struct led_classdev *led_cdev)
{
	down_write(&led_cdev->trigger_lock);
	led_trigger_set(led_cdev, NULL);
	up_write(&led_cdev->trigger_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_remove);

void led_trigger_set_default(struct led_classdev *led_cdev)
{
	struct led_trigger *trig;

	if (!led_cdev->default_trigger)
		return;

	down_read(&triggers_list_lock);
	down_write(&led_cdev->trigger_lock);
	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (!strcmp(led_cdev->default_trigger, trig->name))
			led_trigger_set(led_cdev, trig);
	}
	up_write(&led_cdev->trigger_lock);
	up_read(&triggers_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_set_default);

void led_trigger_rename_static(const char *name, struct led_trigger *trig)
{
	/* new name must be on a temporary string to prevent races */
	BUG_ON(name == trig->name);

	down_write(&triggers_list_lock);
	/* this assumes that trig->name was originaly allocated to
	 * non constant storage */
	strcpy((char *)trig->name, name);
	up_write(&triggers_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_rename_static);

/* LED Trigger Interface */

int led_trigger_register(struct led_trigger *trig)
{
	struct led_classdev *led_cdev;
	struct led_trigger *_trig;

	rwlock_init(&trig->leddev_list_lock);
	INIT_LIST_HEAD(&trig->led_cdevs);

	down_write(&triggers_list_lock);
	/* Make sure the trigger's name isn't already in use */
	list_for_each_entry(_trig, &trigger_list, next_trig) {
		if (!strcmp(_trig->name, trig->name)) {
			up_write(&triggers_list_lock);
			return -EEXIST;
		}
	}
	/* Add to the list of led triggers */
	list_add_tail(&trig->next_trig, &trigger_list);
	up_write(&triggers_list_lock);

	/* Register with any LEDs that have this as a default trigger */
	down_read(&leds_list_lock);
	list_for_each_entry(led_cdev, &leds_list, node) {
		down_write(&led_cdev->trigger_lock);
		if (!led_cdev->trigger && led_cdev->default_trigger &&
			    !strcmp(led_cdev->default_trigger, trig->name))
			led_trigger_set(led_cdev, trig);
		up_write(&led_cdev->trigger_lock);
	}
	up_read(&leds_list_lock);

	return 0;
}
EXPORT_SYMBOL_GPL(led_trigger_register);

void led_trigger_unregister(struct led_trigger *trig)
{
	struct led_classdev *led_cdev;

	if (list_empty_careful(&trig->next_trig))
		return;

	/* Remove from the list of led triggers */
	down_write(&triggers_list_lock);
	list_del_init(&trig->next_trig);
	up_write(&triggers_list_lock);

	/* Remove anyone actively using this trigger */
	down_read(&leds_list_lock);
	list_for_each_entry(led_cdev, &leds_list, node) {
		down_write(&led_cdev->trigger_lock);
		if (led_cdev->trigger == trig)
			led_trigger_set(led_cdev, NULL);
		up_write(&led_cdev->trigger_lock);
	}
	up_read(&leds_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_unregister);

static void devm_led_trigger_release(struct device *dev, void *res)
{
	led_trigger_unregister(*(struct led_trigger **)res);
}

int devm_led_trigger_register(struct device *dev,
			      struct led_trigger *trig)
{
	struct led_trigger **dr;
	int rc;

	dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
			  GFP_KERNEL);
	if (!dr)
		return -ENOMEM;

	*dr = trig;

	rc = led_trigger_register(trig);
	if (rc)
		devres_free(dr);
	else
		devres_add(dev, dr);

	return rc;
}
EXPORT_SYMBOL_GPL(devm_led_trigger_register);

/* Simple LED Tigger Interface */

void led_trigger_event(struct led_trigger *trig,
			enum led_brightness brightness)
{
	struct led_classdev *led_cdev;

	if (!trig)
		return;

	read_lock(&trig->leddev_list_lock);
	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
		led_set_brightness(led_cdev, brightness);
	read_unlock(&trig->leddev_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_event);

static void led_trigger_blink_setup(struct led_trigger *trig,
			     unsigned long *delay_on,
			     unsigned long *delay_off,
			     int oneshot,
			     int invert)
{
	struct led_classdev *led_cdev;

	if (!trig)
		return;

	read_lock(&trig->leddev_list_lock);
	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
		if (oneshot)
			led_blink_set_oneshot(led_cdev, delay_on, delay_off,
					      invert);
		else
			led_blink_set(led_cdev, delay_on, delay_off);
	}
	read_unlock(&trig->leddev_list_lock);
}

void led_trigger_blink(struct led_trigger *trig,
		       unsigned long *delay_on,
		       unsigned long *delay_off)
{
	led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
}
EXPORT_SYMBOL_GPL(led_trigger_blink);

void led_trigger_blink_oneshot(struct led_trigger *trig,
			       unsigned long *delay_on,
			       unsigned long *delay_off,
			       int invert)
{
	led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
}
EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);

void led_trigger_register_simple(const char *name, struct led_trigger **tp)
{
	struct led_trigger *trig;
	int err;

	trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);

	if (trig) {
		trig->name = name;
		err = led_trigger_register(trig);
		if (err < 0) {
			kfree(trig);
			trig = NULL;
			pr_warn("LED trigger %s failed to register (%d)\n",
				name, err);
		}
	} else {
		pr_warn("LED trigger %s failed to register (no memory)\n",
			name);
	}
	*tp = trig;
}
EXPORT_SYMBOL_GPL(led_trigger_register_simple);

void led_trigger_unregister_simple(struct led_trigger *trig)
{
	if (trig)
		led_trigger_unregister(trig);
	kfree(trig);
}
EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);

MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("LED Triggers Core");
Commit	Line	Data
c3bc9956 RP	1	/*
	2	* LED Triggers Core
	3	*
f8a7c6fe	4	* Copyright 2005-2007 Openedhand Ltd.
c3bc9956 RP	5	*
	6	* Author: Richard Purdie <rpurdie@openedhand.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13
c3bc9956 RP	14	#include <linux/module.h>
c3bc9956 RP	15	#include <linux/kernel.h>
c3bc9956 RP	16	#include <linux/list.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/device.h>
c3bc9956	19	#include <linux/timer.h>
dc47206e	20	#include <linux/rwsem.h>
c3bc9956	21	#include <linux/leds.h>
5a0e3ad6	22	#include <linux/slab.h>
c3bc9956 RP	23	#include "leds.h"
	24
	25	/*
	26	* Nests outside led_cdev->trigger_lock
	27	*/
dc47206e	28	static DECLARE_RWSEM(triggers_list_lock);
ba93cdce	29	LIST_HEAD(trigger_list);
c3bc9956	30
4d404fd5 NM	31	/* Used by LED Class */
4d404fd5 NM	32
f8a7c6fe RP	33	ssize_t led_trigger_store(struct device dev, struct device_attribute attr,
f8a7c6fe RP	34	const char *buf, size_t count)
c3bc9956	35	{
f8a7c6fe	36	struct led_classdev *led_cdev = dev_get_drvdata(dev);
c3bc9956	37	struct led_trigger *trig;
acd899e4 JA	38	int ret = count;
	39
	40	mutex_lock(&led_cdev->led_access);
	41
	42	if (led_sysfs_is_disabled(led_cdev)) {
	43	ret = -EBUSY;
	44	goto unlock;
	45	}
c3bc9956	46
7296c33e	47	if (sysfs_streq(buf, "none")) {
0013b23d	48	led_trigger_remove(led_cdev);
acd899e4	49	goto unlock;
c3bc9956 RP	50	}
c3bc9956 RP	51
dc47206e	52	down_read(&triggers_list_lock);
c3bc9956	53	list_for_each_entry(trig, &trigger_list, next_trig) {
7296c33e	54	if (sysfs_streq(buf, trig->name)) {
dc47206e	55	down_write(&led_cdev->trigger_lock);
c3bc9956	56	led_trigger_set(led_cdev, trig);
dc47206e	57	up_write(&led_cdev->trigger_lock);
c3bc9956	58
dc47206e	59	up_read(&triggers_list_lock);
acd899e4	60	goto unlock;
c3bc9956 RP	61	}
c3bc9956 RP	62	}
a3eac76c HK	63	/* we come here only if buf matches no trigger */
a3eac76c HK	64	ret = -EINVAL;
dc47206e	65	up_read(&triggers_list_lock);
c3bc9956	66
acd899e4 JA	67	unlock:
	68	mutex_unlock(&led_cdev->led_access);
	69	return ret;
c3bc9956	70	}
4d404fd5	71	EXPORT_SYMBOL_GPL(led_trigger_store);
c3bc9956	72
f8a7c6fe RP	73	ssize_t led_trigger_show(struct device dev, struct device_attribute attr,
f8a7c6fe RP	74	char *buf)
c3bc9956	75	{
f8a7c6fe	76	struct led_classdev *led_cdev = dev_get_drvdata(dev);
c3bc9956 RP	77	struct led_trigger *trig;
	78	int len = 0;
	79
dc47206e RP	80	down_read(&triggers_list_lock);
dc47206e RP	81	down_read(&led_cdev->trigger_lock);
c3bc9956 RP	82
	83	if (!led_cdev->trigger)
	84	len += sprintf(buf+len, "[none] ");
	85	else
	86	len += sprintf(buf+len, "none ");
	87
	88	list_for_each_entry(trig, &trigger_list, next_trig) {
	89	if (led_cdev->trigger && !strcmp(led_cdev->trigger->name,
	90	trig->name))
	91	len += sprintf(buf+len, "[%s] ", trig->name);
	92	else
	93	len += sprintf(buf+len, "%s ", trig->name);
	94	}
dc47206e RP	95	up_read(&led_cdev->trigger_lock);
dc47206e RP	96	up_read(&triggers_list_lock);
c3bc9956 RP	97
	98	len += sprintf(len+buf, "\n");
	99	return len;
	100	}
4d404fd5	101	EXPORT_SYMBOL_GPL(led_trigger_show);
c3bc9956 RP	102
c3bc9956 RP	103	/* Caller must ensure led_cdev->trigger_lock held */
eb202621	104	void led_trigger_set(struct led_classdev led_cdev, struct led_trigger trig)
c3bc9956 RP	105	{
c3bc9956 RP	106	unsigned long flags;
52c47742 CC	107	char *event = NULL;
	108	char *envp[2];
	109	const char *name;
	110
	111	name = trig ? trig->name : "none";
	112	event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);
c3bc9956 RP	113
	114	/* Remove any existing trigger */
	115	if (led_cdev->trigger) {
	116	write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
	117	list_del(&led_cdev->trig_list);
4d404fd5 NM	118	write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
4d404fd5 NM	119	flags);
d23a22a7 FB	120	cancel_work_sync(&led_cdev->set_brightness_work);
d23a22a7 FB	121	led_stop_software_blink(led_cdev);
c3bc9956 RP	122	if (led_cdev->trigger->deactivate)
c3bc9956 RP	123	led_cdev->trigger->deactivate(led_cdev);
fe3025b5	124	led_cdev->trigger = NULL;
19cd67e2	125	led_set_brightness(led_cdev, LED_OFF);
c3bc9956	126	}
eb202621 BW	127	if (trig) {
	128	write_lock_irqsave(&trig->leddev_list_lock, flags);
	129	list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
	130	write_unlock_irqrestore(&trig->leddev_list_lock, flags);
	131	led_cdev->trigger = trig;
	132	if (trig->activate)
	133	trig->activate(led_cdev);
c3bc9956	134	}
52c47742 CC	135
	136	if (event) {
	137	envp[0] = event;
	138	envp[1] = NULL;
	139	kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
	140	kfree(event);
	141	}
c3bc9956	142	}
4d404fd5	143	EXPORT_SYMBOL_GPL(led_trigger_set);
c3bc9956	144
0013b23d NM	145	void led_trigger_remove(struct led_classdev *led_cdev)
	146	{
	147	down_write(&led_cdev->trigger_lock);
	148	led_trigger_set(led_cdev, NULL);
	149	up_write(&led_cdev->trigger_lock);
	150	}
4d404fd5	151	EXPORT_SYMBOL_GPL(led_trigger_remove);
0013b23d	152
c3bc9956 RP	153	void led_trigger_set_default(struct led_classdev *led_cdev)
	154	{
	155	struct led_trigger *trig;
	156
	157	if (!led_cdev->default_trigger)
	158	return;
	159
dc47206e RP	160	down_read(&triggers_list_lock);
dc47206e RP	161	down_write(&led_cdev->trigger_lock);
c3bc9956 RP	162	list_for_each_entry(trig, &trigger_list, next_trig) {
	163	if (!strcmp(led_cdev->default_trigger, trig->name))
	164	led_trigger_set(led_cdev, trig);
	165	}
dc47206e RP	166	up_write(&led_cdev->trigger_lock);
dc47206e RP	167	up_read(&triggers_list_lock);
c3bc9956	168	}
4d404fd5 NM	169	EXPORT_SYMBOL_GPL(led_trigger_set_default);
4d404fd5 NM	170
a8df7b1a FB	171	void led_trigger_rename_static(const char name, struct led_trigger trig)
	172	{
	173	/* new name must be on a temporary string to prevent races */
	174	BUG_ON(name == trig->name);
	175
	176	down_write(&triggers_list_lock);
	177	/* this assumes that trig->name was originaly allocated to
	178	* non constant storage */
	179	strcpy((char *)trig->name, name);
	180	up_write(&triggers_list_lock);
	181	}
	182	EXPORT_SYMBOL_GPL(led_trigger_rename_static);
	183
4d404fd5	184	/* LED Trigger Interface */
c3bc9956	185
eb202621	186	int led_trigger_register(struct led_trigger *trig)
c3bc9956 RP	187	{
c3bc9956 RP	188	struct led_classdev *led_cdev;
eb202621	189	struct led_trigger *_trig;
c3bc9956	190
eb202621 BW	191	rwlock_init(&trig->leddev_list_lock);
eb202621 BW	192	INIT_LIST_HEAD(&trig->led_cdevs);
c3bc9956	193
dc47206e	194	down_write(&triggers_list_lock);
700c6ea2	195	/* Make sure the trigger's name isn't already in use */
eb202621 BW	196	list_for_each_entry(_trig, &trigger_list, next_trig) {
eb202621 BW	197	if (!strcmp(_trig->name, trig->name)) {
700c6ea2 AN	198	up_write(&triggers_list_lock);
	199	return -EEXIST;
	200	}
	201	}
	202	/* Add to the list of led triggers */
eb202621	203	list_add_tail(&trig->next_trig, &trigger_list);
dc47206e	204	up_write(&triggers_list_lock);
c3bc9956 RP	205
c3bc9956 RP	206	/* Register with any LEDs that have this as a default trigger */
72f8da32	207	down_read(&leds_list_lock);
c3bc9956	208	list_for_each_entry(led_cdev, &leds_list, node) {
dc47206e	209	down_write(&led_cdev->trigger_lock);
c3bc9956	210	if (!led_cdev->trigger && led_cdev->default_trigger &&
eb202621 BW	211	!strcmp(led_cdev->default_trigger, trig->name))
eb202621 BW	212	led_trigger_set(led_cdev, trig);
dc47206e	213	up_write(&led_cdev->trigger_lock);
c3bc9956	214	}
72f8da32	215	up_read(&leds_list_lock);
c3bc9956 RP	216
	217	return 0;
	218	}
4d404fd5	219	EXPORT_SYMBOL_GPL(led_trigger_register);
c3bc9956	220
eb202621	221	void led_trigger_unregister(struct led_trigger *trig)
c3bc9956 RP	222	{
	223	struct led_classdev *led_cdev;
	224
14f5716b SL	225	if (list_empty_careful(&trig->next_trig))
	226	return;
	227
c3bc9956	228	/* Remove from the list of led triggers */
dc47206e	229	down_write(&triggers_list_lock);
14f5716b	230	list_del_init(&trig->next_trig);
dc47206e	231	up_write(&triggers_list_lock);
c3bc9956 RP	232
c3bc9956 RP	233	/* Remove anyone actively using this trigger */
72f8da32	234	down_read(&leds_list_lock);
c3bc9956	235	list_for_each_entry(led_cdev, &leds_list, node) {
dc47206e	236	down_write(&led_cdev->trigger_lock);
eb202621	237	if (led_cdev->trigger == trig)
c3bc9956	238	led_trigger_set(led_cdev, NULL);
dc47206e	239	up_write(&led_cdev->trigger_lock);
c3bc9956	240	}
72f8da32	241	up_read(&leds_list_lock);
c3bc9956	242	}
4d404fd5	243	EXPORT_SYMBOL_GPL(led_trigger_unregister);
c3bc9956	244
9534cc31 HK	245	static void devm_led_trigger_release(struct device dev, void res)
	246	{
	247	led_trigger_unregister((struct led_trigger *)res);
	248	}
	249
	250	int devm_led_trigger_register(struct device *dev,
	251	struct led_trigger *trig)
	252	{
	253	struct led_trigger **dr;
	254	int rc;
	255
	256	dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
	257	GFP_KERNEL);
	258	if (!dr)
	259	return -ENOMEM;
	260
	261	*dr = trig;
	262
	263	rc = led_trigger_register(trig);
	264	if (rc)
	265	devres_free(dr);
	266	else
	267	devres_add(dev, dr);
	268
	269	return rc;
	270	}
	271	EXPORT_SYMBOL_GPL(devm_led_trigger_register);
	272
4d404fd5 NM	273	/* Simple LED Tigger Interface */
4d404fd5 NM	274
eb202621	275	void led_trigger_event(struct led_trigger *trig,
4d404fd5	276	enum led_brightness brightness)
c3bc9956	277	{
11e043b5	278	struct led_classdev *led_cdev;
4d404fd5	279
eb202621	280	if (!trig)
4d404fd5 NM	281	return;
4d404fd5 NM	282
eb202621	283	read_lock(&trig->leddev_list_lock);
11e043b5	284	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
d23a22a7	285	led_set_brightness(led_cdev, brightness);
eb202621	286	read_unlock(&trig->leddev_list_lock);
c3bc9956	287	}
4d404fd5	288	EXPORT_SYMBOL_GPL(led_trigger_event);
c3bc9956	289
20c0e6b8	290	static void led_trigger_blink_setup(struct led_trigger *trig,
5bb629c5 FB	291	unsigned long *delay_on,
	292	unsigned long *delay_off,
	293	int oneshot,
	294	int invert)
0b9536c9	295	{
11e043b5	296	struct led_classdev *led_cdev;
0b9536c9	297
eb202621	298	if (!trig)
0b9536c9 VK	299	return;
0b9536c9 VK	300
eb202621	301	read_lock(&trig->leddev_list_lock);
11e043b5	302	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
5bb629c5 FB	303	if (oneshot)
	304	led_blink_set_oneshot(led_cdev, delay_on, delay_off,
	305	invert);
	306	else
	307	led_blink_set(led_cdev, delay_on, delay_off);
0b9536c9	308	}
eb202621	309	read_unlock(&trig->leddev_list_lock);
0b9536c9	310	}
5bb629c5 FB	311
	312	void led_trigger_blink(struct led_trigger *trig,
	313	unsigned long *delay_on,
	314	unsigned long *delay_off)
	315	{
	316	led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
	317	}
0b9536c9 VK	318	EXPORT_SYMBOL_GPL(led_trigger_blink);
0b9536c9 VK	319
5bb629c5 FB	320	void led_trigger_blink_oneshot(struct led_trigger *trig,
	321	unsigned long *delay_on,
	322	unsigned long *delay_off,
	323	int invert)
	324	{
	325	led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
	326	}
	327	EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);
	328
4d404fd5 NM	329	void led_trigger_register_simple(const char name, struct led_trigger *tp)
4d404fd5 NM	330	{
eb202621	331	struct led_trigger *trig;
4d404fd5	332	int err;
c3bc9956	333
eb202621	334	trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
c3bc9956	335
eb202621 BW	336	if (trig) {
	337	trig->name = name;
	338	err = led_trigger_register(trig);
cba4c2ac	339	if (err < 0) {
eb202621 BW	340	kfree(trig);
eb202621 BW	341	trig = NULL;
09f5fe75 SK	342	pr_warn("LED trigger %s failed to register (%d)\n",
09f5fe75 SK	343	name, err);
cba4c2ac	344	}
09f5fe75 SK	345	} else {
	346	pr_warn("LED trigger %s failed to register (no memory)\n",
	347	name);
	348	}
eb202621	349	*tp = trig;
4d404fd5	350	}
c3bc9956	351	EXPORT_SYMBOL_GPL(led_trigger_register_simple);
4d404fd5	352
eb202621	353	void led_trigger_unregister_simple(struct led_trigger *trig)
4d404fd5	354	{
eb202621 BW	355	if (trig)
	356	led_trigger_unregister(trig);
	357	kfree(trig);
4d404fd5	358	}
c3bc9956	359	EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);
c3bc9956 RP	360
	361	MODULE_AUTHOR("Richard Purdie");
	362	MODULE_LICENSE("GPL");
	363	MODULE_DESCRIPTION("LED Triggers Core");