[linux-2.6-block.git] / sound / soc / soc-jack.c

/*
 * soc-jack.c  --  ALSA SoC jack handling
 *
 * Copyright 2008 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <sound/jack.h>
#include <sound/soc.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <trace/events/asoc.h>

/**
 * snd_soc_jack_new - Create a new jack
 * @codec: ASoC codec
 * @id:    an identifying string for this jack
 * @type:  a bitmask of enum snd_jack_type values that can be detected by
 *         this jack
 * @jack:  structure to use for the jack
 *
 * Creates a new jack object.
 *
 * Returns zero if successful, or a negative error code on failure.
 * On success jack will be initialised.
 */
int snd_soc_jack_new(struct snd_soc_codec *codec, const char *id, int type,
		     struct snd_soc_jack *jack)
{
	mutex_init(&jack->mutex);
	jack->codec = codec;
	INIT_LIST_HEAD(&jack->pins);
	INIT_LIST_HEAD(&jack->jack_zones);
	BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);

	return snd_jack_new(codec->card->snd_card, id, type, &jack->jack);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_new);

/**
 * snd_soc_jack_report - Report the current status for a jack
 *
 * @jack:   the jack
 * @status: a bitmask of enum snd_jack_type values that are currently detected.
 * @mask:   a bitmask of enum snd_jack_type values that being reported.
 *
 * If configured using snd_soc_jack_add_pins() then the associated
 * DAPM pins will be enabled or disabled as appropriate and DAPM
 * synchronised.
 *
 * Note: This function uses mutexes and should be called from a
 * context which can sleep (such as a workqueue).
 */
void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
{
	struct snd_soc_codec *codec;
	struct snd_soc_dapm_context *dapm;
	struct snd_soc_jack_pin *pin;
	int enable;
	int oldstatus;

	trace_snd_soc_jack_report(jack, mask, status);

	if (!jack)
		return;

	codec = jack->codec;
	dapm =  &codec->dapm;

	mutex_lock(&jack->mutex);

	oldstatus = jack->status;

	jack->status &= ~mask;
	jack->status |= status & mask;

	trace_snd_soc_jack_notify(jack, status);

	list_for_each_entry(pin, &jack->pins, list) {
		enable = pin->mask & jack->status;

		if (pin->invert)
			enable = !enable;

		if (enable)
			snd_soc_dapm_enable_pin(dapm, pin->pin);
		else
			snd_soc_dapm_disable_pin(dapm, pin->pin);
	}

	/* Report before the DAPM sync to help users updating micbias status */
	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);

	snd_soc_dapm_sync(dapm);

	snd_jack_report(jack->jack, jack->status);

	mutex_unlock(&jack->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_report);

/**
 * snd_soc_jack_add_zones - Associate voltage zones with jack
 *
 * @jack:  ASoC jack
 * @count: Number of zones
 * @zone:  Array of zones
 *
 * After this function has been called the zones specified in the
 * array will be associated with the jack.
 */
int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
			  struct snd_soc_jack_zone *zones)
{
	int i;

	for (i = 0; i < count; i++) {
		INIT_LIST_HEAD(&zones[i].list);
		list_add(&(zones[i].list), &jack->jack_zones);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);

/**
 * snd_soc_jack_get_type - Based on the mic bias value, this function returns
 * the type of jack from the zones declared in the jack type
 *
 * @jack:  ASoC jack
 * @micbias_voltage:  mic bias voltage at adc channel when jack is plugged in
 *
 * Based on the mic bias value passed, this function helps identify
 * the type of jack from the already declared jack zones
 */
int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
{
	struct snd_soc_jack_zone *zone;

	list_for_each_entry(zone, &jack->jack_zones, list) {
		if (micbias_voltage >= zone->min_mv &&
			micbias_voltage < zone->max_mv)
				return zone->jack_type;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);

/**
 * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
 *
 * @jack:  ASoC jack
 * @count: Number of pins
 * @pins:  Array of pins
 *
 * After this function has been called the DAPM pins specified in the
 * pins array will have their status updated to reflect the current
 * state of the jack whenever the jack status is updated.
 */
int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
			  struct snd_soc_jack_pin *pins)
{
	int i;

	for (i = 0; i < count; i++) {
		if (!pins[i].pin) {
			printk(KERN_ERR "No name for pin %d\n", i);
			return -EINVAL;
		}
		if (!pins[i].mask) {
			printk(KERN_ERR "No mask for pin %d (%s)\n", i,
			       pins[i].pin);
			return -EINVAL;
		}

		INIT_LIST_HEAD(&pins[i].list);
		list_add(&(pins[i].list), &jack->pins);
	}

	snd_soc_dapm_new_widgets(&jack->codec->card->dapm);

	/* Update to reflect the last reported status; canned jack
	 * implementations are likely to set their state before the
	 * card has an opportunity to associate pins.
	 */
	snd_soc_jack_report(jack, 0, 0);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);

/**
 * snd_soc_jack_notifier_register - Register a notifier for jack status
 *
 * @jack:  ASoC jack
 * @nb:    Notifier block to register
 *
 * Register for notification of the current status of the jack.  Note
 * that it is not possible to report additional jack events in the
 * callback from the notifier, this is intended to support
 * applications such as enabling electrical detection only when a
 * mechanical detection event has occurred.
 */
void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
				    struct notifier_block *nb)
{
	blocking_notifier_chain_register(&jack->notifier, nb);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);

/**
 * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
 *
 * @jack:  ASoC jack
 * @nb:    Notifier block to unregister
 *
 * Stop notifying for status changes.
 */
void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
				      struct notifier_block *nb)
{
	blocking_notifier_chain_unregister(&jack->notifier, nb);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);

#ifdef CONFIG_GPIOLIB
/* gpio detect */
static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
{
	struct snd_soc_jack *jack = gpio->jack;
	int enable;
	int report;

	enable = gpio_get_value_cansleep(gpio->gpio);
	if (gpio->invert)
		enable = !enable;

	if (enable)
		report = gpio->report;
	else
		report = 0;

	if (gpio->jack_status_check)
		report = gpio->jack_status_check();

	snd_soc_jack_report(jack, report, gpio->report);
}

/* irq handler for gpio pin */
static irqreturn_t gpio_handler(int irq, void *data)
{
	struct snd_soc_jack_gpio *gpio = data;
	struct device *dev = gpio->jack->codec->card->dev;

	trace_snd_soc_jack_irq(gpio->name);

	if (device_may_wakeup(dev))
		pm_wakeup_event(dev, gpio->debounce_time + 50);

	schedule_delayed_work(&gpio->work,
			      msecs_to_jiffies(gpio->debounce_time));

	return IRQ_HANDLED;
}

/* gpio work */
static void gpio_work(struct work_struct *work)
{
	struct snd_soc_jack_gpio *gpio;

	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
	snd_soc_jack_gpio_detect(gpio);
}

/**
 * snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
 *
 * @jack:  ASoC jack
 * @count: number of pins
 * @gpios: array of gpio pins
 *
 * This function will request gpio, set data direction and request irq
 * for each gpio in the array.
 */
int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
			struct snd_soc_jack_gpio *gpios)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		if (!gpio_is_valid(gpios[i].gpio)) {
			printk(KERN_ERR "Invalid gpio %d\n",
				gpios[i].gpio);
			ret = -EINVAL;
			goto undo;
		}
		if (!gpios[i].name) {
			printk(KERN_ERR "No name for gpio %d\n",
				gpios[i].gpio);
			ret = -EINVAL;
			goto undo;
		}

		ret = gpio_request(gpios[i].gpio, gpios[i].name);
		if (ret)
			goto undo;

		ret = gpio_direction_input(gpios[i].gpio);
		if (ret)
			goto err;

		INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
		gpios[i].jack = jack;

		ret = request_any_context_irq(gpio_to_irq(gpios[i].gpio),
					      gpio_handler,
					      IRQF_TRIGGER_RISING |
					      IRQF_TRIGGER_FALLING,
					      gpios[i].name,
					      &gpios[i]);
		if (ret < 0)
			goto err;

		if (gpios[i].wake) {
			ret = irq_set_irq_wake(gpio_to_irq(gpios[i].gpio), 1);
			if (ret != 0)
				printk(KERN_ERR
				  "Failed to mark GPIO %d as wake source: %d\n",
					gpios[i].gpio, ret);
		}

		/* Expose GPIO value over sysfs for diagnostic purposes */
		gpio_export(gpios[i].gpio, false);

		/* Update initial jack status */
		snd_soc_jack_gpio_detect(&gpios[i]);
	}

	return 0;

err:
	gpio_free(gpios[i].gpio);
undo:
	snd_soc_jack_free_gpios(jack, i, gpios);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);

/**
 * snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
 *
 * @jack:  ASoC jack
 * @count: number of pins
 * @gpios: array of gpio pins
 *
 * Release gpio and irq resources for gpio pins associated with an ASoC jack.
 */
void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
			struct snd_soc_jack_gpio *gpios)
{
	int i;

	for (i = 0; i < count; i++) {
		gpio_unexport(gpios[i].gpio);
		free_irq(gpio_to_irq(gpios[i].gpio), &gpios[i]);
		cancel_delayed_work_sync(&gpios[i].work);
		gpio_free(gpios[i].gpio);
		gpios[i].jack = NULL;
	}
}
EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
#endif	/* CONFIG_GPIOLIB */
Commit	Line	Data
8a2cd618 MB	1	/*
	2	* soc-jack.c -- ALSA SoC jack handling
	3	*
	4	* Copyright 2008 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <sound/jack.h>
	15	#include <sound/soc.h>
ec67624d LCM	16	#include <linux/gpio.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/workqueue.h>
	19	#include <linux/delay.h>
d81a6d71	20	#include <linux/export.h>
3028eb8c	21	#include <trace/events/asoc.h>
8a2cd618 MB	22
	23	/**
	24	* snd_soc_jack_new - Create a new jack
a92b078e	25	* @codec: ASoC codec
8a2cd618 MB	26	* @id: an identifying string for this jack
	27	* @type: a bitmask of enum snd_jack_type values that can be detected by
	28	* this jack
	29	* @jack: structure to use for the jack
	30	*
	31	* Creates a new jack object.
	32	*
	33	* Returns zero if successful, or a negative error code on failure.
	34	* On success jack will be initialised.
	35	*/
f0fba2ad	36	int snd_soc_jack_new(struct snd_soc_codec codec, const char id, int type,
8a2cd618 MB	37	struct snd_soc_jack *jack)
8a2cd618 MB	38	{
2667b4b8	39	mutex_init(&jack->mutex);
f0fba2ad	40	jack->codec = codec;
8a2cd618	41	INIT_LIST_HEAD(&jack->pins);
fa9879ed	42	INIT_LIST_HEAD(&jack->jack_zones);
d5021ec9	43	BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
8a2cd618	44
f0fba2ad	45	return snd_jack_new(codec->card->snd_card, id, type, &jack->jack);
8a2cd618 MB	46	}
	47	EXPORT_SYMBOL_GPL(snd_soc_jack_new);
	48
	49	/**
	50	* snd_soc_jack_report - Report the current status for a jack
	51	*
	52	* @jack: the jack
	53	* @status: a bitmask of enum snd_jack_type values that are currently detected.
	54	* @mask: a bitmask of enum snd_jack_type values that being reported.
	55	*
	56	* If configured using snd_soc_jack_add_pins() then the associated
	57	* DAPM pins will be enabled or disabled as appropriate and DAPM
	58	* synchronised.
	59	*
	60	* Note: This function uses mutexes and should be called from a
	61	* context which can sleep (such as a workqueue).
	62	*/
	63	void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
	64	{
4f066173	65	struct snd_soc_codec *codec;
ce6120cc	66	struct snd_soc_dapm_context *dapm;
8a2cd618 MB	67	struct snd_soc_jack_pin *pin;
	68	int enable;
	69	int oldstatus;
	70
3028eb8c MB	71	trace_snd_soc_jack_report(jack, mask, status);
3028eb8c MB	72
3a278a0c	73	if (!jack)
8a2cd618	74	return;
3a278a0c	75
f0fba2ad	76	codec = jack->codec;
ce6120cc	77	dapm = &codec->dapm;
8a2cd618	78
2667b4b8	79	mutex_lock(&jack->mutex);
8a2cd618 MB	80
	81	oldstatus = jack->status;
	82
	83	jack->status &= ~mask;
178b699c	84	jack->status \|= status & mask;
8a2cd618	85
3028eb8c MB	86	trace_snd_soc_jack_notify(jack, status);
3028eb8c MB	87
8a2cd618	88	list_for_each_entry(pin, &jack->pins, list) {
178b699c	89	enable = pin->mask & jack->status;
8a2cd618 MB	90
	91	if (pin->invert)
	92	enable = !enable;
	93
	94	if (enable)
ce6120cc	95	snd_soc_dapm_enable_pin(dapm, pin->pin);
8a2cd618	96	else
ce6120cc	97	snd_soc_dapm_disable_pin(dapm, pin->pin);
8a2cd618 MB	98	}
8a2cd618 MB	99
d5021ec9	100	/* Report before the DAPM sync to help users updating micbias status */
12022a78	101	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);
d5021ec9	102
ce6120cc	103	snd_soc_dapm_sync(dapm);
8a2cd618	104
747da0f8	105	snd_jack_report(jack->jack, jack->status);
8a2cd618	106
2667b4b8	107	mutex_unlock(&jack->mutex);
8a2cd618 MB	108	}
	109	EXPORT_SYMBOL_GPL(snd_soc_jack_report);
	110
fa9879ed VK	111	/**
	112	* snd_soc_jack_add_zones - Associate voltage zones with jack
	113	*
	114	* @jack: ASoC jack
	115	* @count: Number of zones
	116	* @zone: Array of zones
	117	*
	118	* After this function has been called the zones specified in the
	119	* array will be associated with the jack.
	120	*/
	121	int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
	122	struct snd_soc_jack_zone *zones)
	123	{
	124	int i;
	125
	126	for (i = 0; i < count; i++) {
	127	INIT_LIST_HEAD(&zones[i].list);
	128	list_add(&(zones[i].list), &jack->jack_zones);
	129	}
	130	return 0;
	131	}
	132	EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);
	133
	134	/**
	135	* snd_soc_jack_get_type - Based on the mic bias value, this function returns
a92b078e	136	* the type of jack from the zones declared in the jack type
fa9879ed	137	*
a92b078e	138	* @jack: ASoC jack
fa9879ed VK	139	* @micbias_voltage: mic bias voltage at adc channel when jack is plugged in
	140	*
	141	* Based on the mic bias value passed, this function helps identify
a92b078e	142	* the type of jack from the already declared jack zones
fa9879ed VK	143	*/
	144	int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
	145	{
	146	struct snd_soc_jack_zone *zone;
	147
	148	list_for_each_entry(zone, &jack->jack_zones, list) {
	149	if (micbias_voltage >= zone->min_mv &&
	150	micbias_voltage < zone->max_mv)
	151	return zone->jack_type;
	152	}
	153	return 0;
	154	}
	155	EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);
	156
8a2cd618 MB	157	/**
	158	* snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
	159	*
	160	* @jack: ASoC jack
	161	* @count: Number of pins
	162	* @pins: Array of pins
	163	*
	164	* After this function has been called the DAPM pins specified in the
	165	* pins array will have their status updated to reflect the current
	166	* state of the jack whenever the jack status is updated.
	167	*/
	168	int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
	169	struct snd_soc_jack_pin *pins)
	170	{
	171	int i;
	172
	173	for (i = 0; i < count; i++) {
	174	if (!pins[i].pin) {
	175	printk(KERN_ERR "No name for pin %d\n", i);
	176	return -EINVAL;
	177	}
	178	if (!pins[i].mask) {
	179	printk(KERN_ERR "No mask for pin %d (%s)\n", i,
	180	pins[i].pin);
	181	return -EINVAL;
	182	}
	183
	184	INIT_LIST_HEAD(&pins[i].list);
	185	list_add(&(pins[i].list), &jack->pins);
	186	}
	187
143d62a4 MB	188	snd_soc_dapm_new_widgets(&jack->codec->card->dapm);
143d62a4 MB	189
8a2cd618 MB	190	/* Update to reflect the last reported status; canned jack
	191	* implementations are likely to set their state before the
	192	* card has an opportunity to associate pins.
	193	*/
	194	snd_soc_jack_report(jack, 0, 0);
	195
	196	return 0;
	197	}
	198	EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
ec67624d	199
d5021ec9 MB	200	/**
	201	* snd_soc_jack_notifier_register - Register a notifier for jack status
	202	*
	203	* @jack: ASoC jack
	204	* @nb: Notifier block to register
	205	*
	206	* Register for notification of the current status of the jack. Note
	207	* that it is not possible to report additional jack events in the
	208	* callback from the notifier, this is intended to support
	209	* applications such as enabling electrical detection only when a
	210	* mechanical detection event has occurred.
	211	*/
	212	void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
	213	struct notifier_block *nb)
	214	{
	215	blocking_notifier_chain_register(&jack->notifier, nb);
	216	}
	217	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
	218
	219	/**
	220	* snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
	221	*
	222	* @jack: ASoC jack
	223	* @nb: Notifier block to unregister
	224	*
	225	* Stop notifying for status changes.
	226	*/
	227	void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
	228	struct notifier_block *nb)
	229	{
	230	blocking_notifier_chain_unregister(&jack->notifier, nb);
	231	}
	232	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
	233
ec67624d LCM	234	#ifdef CONFIG_GPIOLIB
ec67624d LCM	235	/* gpio detect */
26bd7b49	236	static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
ec67624d LCM	237	{
	238	struct snd_soc_jack *jack = gpio->jack;
	239	int enable;
	240	int report;
	241
535787b6	242	enable = gpio_get_value_cansleep(gpio->gpio);
ec67624d LCM	243	if (gpio->invert)
	244	enable = !enable;
	245
	246	if (enable)
	247	report = gpio->report;
	248	else
	249	report = 0;
	250
c871a053 JS	251	if (gpio->jack_status_check)
	252	report = gpio->jack_status_check();
	253
ec67624d LCM	254	snd_soc_jack_report(jack, report, gpio->report);
	255	}
	256
	257	/* irq handler for gpio pin */
	258	static irqreturn_t gpio_handler(int irq, void *data)
	259	{
	260	struct snd_soc_jack_gpio *gpio = data;
f9a67059 MB	261	struct device *dev = gpio->jack->codec->card->dev;
f9a67059 MB	262
3028eb8c MB	263	trace_snd_soc_jack_irq(gpio->name);
3028eb8c MB	264
f9a67059 MB	265	if (device_may_wakeup(dev))
f9a67059 MB	266	pm_wakeup_event(dev, gpio->debounce_time + 50);
ec67624d	267
4c14d78e MB	268	schedule_delayed_work(&gpio->work,
4c14d78e MB	269	msecs_to_jiffies(gpio->debounce_time));
ec67624d LCM	270
	271	return IRQ_HANDLED;
	272	}
	273
	274	/* gpio work */
	275	static void gpio_work(struct work_struct *work)
	276	{
	277	struct snd_soc_jack_gpio *gpio;
	278
4c14d78e	279	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
ec67624d LCM	280	snd_soc_jack_gpio_detect(gpio);
	281	}
	282
	283	/**
	284	* snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
	285	*
	286	* @jack: ASoC jack
	287	* @count: number of pins
	288	* @gpios: array of gpio pins
	289	*
	290	* This function will request gpio, set data direction and request irq
	291	* for each gpio in the array.
	292	*/
	293	int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
	294	struct snd_soc_jack_gpio *gpios)
	295	{
	296	int i, ret;
	297
	298	for (i = 0; i < count; i++) {
	299	if (!gpio_is_valid(gpios[i].gpio)) {
	300	printk(KERN_ERR "Invalid gpio %d\n",
	301	gpios[i].gpio);
	302	ret = -EINVAL;
	303	goto undo;
	304	}
	305	if (!gpios[i].name) {
	306	printk(KERN_ERR "No name for gpio %d\n",
	307	gpios[i].gpio);
	308	ret = -EINVAL;
	309	goto undo;
	310	}
	311
	312	ret = gpio_request(gpios[i].gpio, gpios[i].name);
	313	if (ret)
	314	goto undo;
	315
	316	ret = gpio_direction_input(gpios[i].gpio);
	317	if (ret)
	318	goto err;
	319
4c14d78e	320	INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
b8e22c1f LPC	321	gpios[i].jack = jack;
b8e22c1f LPC	322
3f58fd84 MB	323	ret = request_any_context_irq(gpio_to_irq(gpios[i].gpio),
	324	gpio_handler,
	325	IRQF_TRIGGER_RISING \|
	326	IRQF_TRIGGER_FALLING,
363618f0	327	gpios[i].name,
3f58fd84	328	&gpios[i]);
d2b4c7bd	329	if (ret < 0)
ec67624d LCM	330	goto err;
ec67624d LCM	331
7887ab3a	332	if (gpios[i].wake) {
458f7f8f	333	ret = irq_set_irq_wake(gpio_to_irq(gpios[i].gpio), 1);
7887ab3a MB	334	if (ret != 0)
	335	printk(KERN_ERR
	336	"Failed to mark GPIO %d as wake source: %d\n",
	337	gpios[i].gpio, ret);
	338	}
	339
178b699c JK	340	/* Expose GPIO value over sysfs for diagnostic purposes */
178b699c JK	341	gpio_export(gpios[i].gpio, false);
178b699c	342
178b699c JK	343	/* Update initial jack status */
178b699c JK	344	snd_soc_jack_gpio_detect(&gpios[i]);
ec67624d LCM	345	}
	346
	347	return 0;
	348
	349	err:
	350	gpio_free(gpios[i].gpio);
	351	undo:
	352	snd_soc_jack_free_gpios(jack, i, gpios);
	353
	354	return ret;
	355	}
	356	EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);
	357
	358	/**
	359	* snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
	360	*
	361	* @jack: ASoC jack
	362	* @count: number of pins
	363	* @gpios: array of gpio pins
	364	*
	365	* Release gpio and irq resources for gpio pins associated with an ASoC jack.
	366	*/
	367	void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
	368	struct snd_soc_jack_gpio *gpios)
	369	{
	370	int i;
	371
	372	for (i = 0; i < count; i++) {
178b699c	373	gpio_unexport(gpios[i].gpio);
ec67624d	374	free_irq(gpio_to_irq(gpios[i].gpio), &gpios[i]);
4c14d78e	375	cancel_delayed_work_sync(&gpios[i].work);
ec67624d LCM	376	gpio_free(gpios[i].gpio);
	377	gpios[i].jack = NULL;
	378	}
	379	}
	380	EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
	381	#endif /* CONFIG_GPIOLIB */