[deliverable/linux.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 <trace/events/asoc.h>

/**
 * snd_soc_jack_new - Create a new jack
 * @card:  ASoC card
 * @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)
{
	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(&codec->mutex);

	oldstatus = jack->status;

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

	/* The DAPM sync is expensive enough to be worth skipping.
	 * However, empty mask means pin synchronization is desired. */
	if (mask && (jack->status == oldstatus))
		goto out;

	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, status, jack);

	snd_soc_dapm_sync(dapm);

	snd_jack_report(jack->jack, status);

out:
	mutex_unlock(&codec->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 delcared in the jack type
 *
 * @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 delcared 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);
	}

	/* 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,
					      jack->codec->dev->driver->name,
					      &gpios[i]);
		if (ret)
			goto err;

		if (gpios[i].wake) {
			ret = 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);
		}

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

		/* 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++) {
#ifdef CONFIG_GPIO_SYSFS
		gpio_unexport(gpios[i].gpio);
#endif
		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>
3028eb8c	20	#include <trace/events/asoc.h>
8a2cd618 MB	21
	22	/**
	23	* snd_soc_jack_new - Create a new jack
	24	* @card: ASoC card
	25	* @id: an identifying string for this jack
	26	* @type: a bitmask of enum snd_jack_type values that can be detected by
	27	* this jack
	28	* @jack: structure to use for the jack
	29	*
	30	* Creates a new jack object.
	31	*
	32	* Returns zero if successful, or a negative error code on failure.
	33	* On success jack will be initialised.
	34	*/
f0fba2ad	35	int snd_soc_jack_new(struct snd_soc_codec codec, const char id, int type,
8a2cd618 MB	36	struct snd_soc_jack *jack)
8a2cd618 MB	37	{
f0fba2ad	38	jack->codec = codec;
8a2cd618	39	INIT_LIST_HEAD(&jack->pins);
fa9879ed	40	INIT_LIST_HEAD(&jack->jack_zones);
d5021ec9	41	BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
8a2cd618	42
f0fba2ad	43	return snd_jack_new(codec->card->snd_card, id, type, &jack->jack);
8a2cd618 MB	44	}
	45	EXPORT_SYMBOL_GPL(snd_soc_jack_new);
	46
	47	/**
	48	* snd_soc_jack_report - Report the current status for a jack
	49	*
	50	* @jack: the jack
	51	* @status: a bitmask of enum snd_jack_type values that are currently detected.
	52	* @mask: a bitmask of enum snd_jack_type values that being reported.
	53	*
	54	* If configured using snd_soc_jack_add_pins() then the associated
	55	* DAPM pins will be enabled or disabled as appropriate and DAPM
	56	* synchronised.
	57	*
	58	* Note: This function uses mutexes and should be called from a
	59	* context which can sleep (such as a workqueue).
	60	*/
	61	void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
	62	{
4f066173	63	struct snd_soc_codec *codec;
ce6120cc	64	struct snd_soc_dapm_context *dapm;
8a2cd618 MB	65	struct snd_soc_jack_pin *pin;
	66	int enable;
	67	int oldstatus;
	68
3028eb8c MB	69	trace_snd_soc_jack_report(jack, mask, status);
3028eb8c MB	70
3a278a0c	71	if (!jack)
8a2cd618	72	return;
3a278a0c	73
f0fba2ad	74	codec = jack->codec;
ce6120cc	75	dapm = &codec->dapm;
8a2cd618 MB	76
	77	mutex_lock(&codec->mutex);
	78
	79	oldstatus = jack->status;
	80
	81	jack->status &= ~mask;
178b699c	82	jack->status \|= status & mask;
8a2cd618	83
178b699c JK	84	/* The DAPM sync is expensive enough to be worth skipping.
	85	* However, empty mask means pin synchronization is desired. */
	86	if (mask && (jack->status == oldstatus))
8a2cd618 MB	87	goto out;
8a2cd618 MB	88
3028eb8c MB	89	trace_snd_soc_jack_notify(jack, status);
3028eb8c MB	90
8a2cd618	91	list_for_each_entry(pin, &jack->pins, list) {
178b699c	92	enable = pin->mask & jack->status;
8a2cd618 MB	93
	94	if (pin->invert)
	95	enable = !enable;
	96
	97	if (enable)
ce6120cc	98	snd_soc_dapm_enable_pin(dapm, pin->pin);
8a2cd618	99	else
ce6120cc	100	snd_soc_dapm_disable_pin(dapm, pin->pin);
8a2cd618 MB	101	}
8a2cd618 MB	102
d5021ec9	103	/* Report before the DAPM sync to help users updating micbias status */
1d2c27f9	104	blocking_notifier_call_chain(&jack->notifier, status, jack);
d5021ec9	105
ce6120cc	106	snd_soc_dapm_sync(dapm);
8a2cd618 MB	107
	108	snd_jack_report(jack->jack, status);
	109
	110	out:
	111	mutex_unlock(&codec->mutex);
	112	}
	113	EXPORT_SYMBOL_GPL(snd_soc_jack_report);
	114
fa9879ed VK	115	/**
	116	* snd_soc_jack_add_zones - Associate voltage zones with jack
	117	*
	118	* @jack: ASoC jack
	119	* @count: Number of zones
	120	* @zone: Array of zones
	121	*
	122	* After this function has been called the zones specified in the
	123	* array will be associated with the jack.
	124	*/
	125	int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
	126	struct snd_soc_jack_zone *zones)
	127	{
	128	int i;
	129
	130	for (i = 0; i < count; i++) {
	131	INIT_LIST_HEAD(&zones[i].list);
	132	list_add(&(zones[i].list), &jack->jack_zones);
	133	}
	134	return 0;
	135	}
	136	EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);
	137
	138	/**
	139	* snd_soc_jack_get_type - Based on the mic bias value, this function returns
	140	* the type of jack from the zones delcared in the jack type
	141	*
	142	* @micbias_voltage: mic bias voltage at adc channel when jack is plugged in
	143	*
	144	* Based on the mic bias value passed, this function helps identify
	145	* the type of jack from the already delcared jack zones
	146	*/
	147	int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
	148	{
	149	struct snd_soc_jack_zone *zone;
	150
	151	list_for_each_entry(zone, &jack->jack_zones, list) {
	152	if (micbias_voltage >= zone->min_mv &&
	153	micbias_voltage < zone->max_mv)
	154	return zone->jack_type;
	155	}
	156	return 0;
	157	}
	158	EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);
	159
8a2cd618 MB	160	/**
	161	* snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
	162	*
	163	* @jack: ASoC jack
	164	* @count: Number of pins
	165	* @pins: Array of pins
	166	*
	167	* After this function has been called the DAPM pins specified in the
	168	* pins array will have their status updated to reflect the current
	169	* state of the jack whenever the jack status is updated.
	170	*/
	171	int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
	172	struct snd_soc_jack_pin *pins)
	173	{
	174	int i;
	175
	176	for (i = 0; i < count; i++) {
	177	if (!pins[i].pin) {
	178	printk(KERN_ERR "No name for pin %d\n", i);
	179	return -EINVAL;
	180	}
	181	if (!pins[i].mask) {
	182	printk(KERN_ERR "No mask for pin %d (%s)\n", i,
	183	pins[i].pin);
	184	return -EINVAL;
	185	}
	186
	187	INIT_LIST_HEAD(&pins[i].list);
	188	list_add(&(pins[i].list), &jack->pins);
	189	}
	190
	191	/* Update to reflect the last reported status; canned jack
	192	* implementations are likely to set their state before the
	193	* card has an opportunity to associate pins.
	194	*/
	195	snd_soc_jack_report(jack, 0, 0);
	196
	197	return 0;
	198	}
	199	EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
ec67624d	200
d5021ec9 MB	201	/**
	202	* snd_soc_jack_notifier_register - Register a notifier for jack status
	203	*
	204	* @jack: ASoC jack
	205	* @nb: Notifier block to register
	206	*
	207	* Register for notification of the current status of the jack. Note
	208	* that it is not possible to report additional jack events in the
	209	* callback from the notifier, this is intended to support
	210	* applications such as enabling electrical detection only when a
	211	* mechanical detection event has occurred.
	212	*/
	213	void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
	214	struct notifier_block *nb)
	215	{
	216	blocking_notifier_chain_register(&jack->notifier, nb);
	217	}
	218	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
	219
	220	/**
	221	* snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
	222	*
	223	* @jack: ASoC jack
	224	* @nb: Notifier block to unregister
	225	*
	226	* Stop notifying for status changes.
	227	*/
	228	void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
	229	struct notifier_block *nb)
	230	{
	231	blocking_notifier_chain_unregister(&jack->notifier, nb);
	232	}
	233	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
	234
ec67624d LCM	235	#ifdef CONFIG_GPIOLIB
ec67624d LCM	236	/* gpio detect */
26bd7b49	237	static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
ec67624d LCM	238	{
	239	struct snd_soc_jack *jack = gpio->jack;
	240	int enable;
	241	int report;
	242
535787b6	243	enable = gpio_get_value_cansleep(gpio->gpio);
ec67624d LCM	244	if (gpio->invert)
	245	enable = !enable;
	246
	247	if (enable)
	248	report = gpio->report;
	249	else
	250	report = 0;
	251
c871a053 JS	252	if (gpio->jack_status_check)
	253	report = gpio->jack_status_check();
	254
ec67624d LCM	255	snd_soc_jack_report(jack, report, gpio->report);
	256	}
	257
	258	/* irq handler for gpio pin */
	259	static irqreturn_t gpio_handler(int irq, void *data)
	260	{
	261	struct snd_soc_jack_gpio *gpio = data;
f9a67059 MB	262	struct device *dev = gpio->jack->codec->card->dev;
f9a67059 MB	263
3028eb8c MB	264	trace_snd_soc_jack_irq(gpio->name);
3028eb8c MB	265
f9a67059 MB	266	if (device_may_wakeup(dev))
f9a67059 MB	267	pm_wakeup_event(dev, gpio->debounce_time + 50);
ec67624d	268
4c14d78e MB	269	schedule_delayed_work(&gpio->work,
4c14d78e MB	270	msecs_to_jiffies(gpio->debounce_time));
ec67624d LCM	271
	272	return IRQ_HANDLED;
	273	}
	274
	275	/* gpio work */
	276	static void gpio_work(struct work_struct *work)
	277	{
	278	struct snd_soc_jack_gpio *gpio;
	279
4c14d78e	280	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
ec67624d LCM	281	snd_soc_jack_gpio_detect(gpio);
	282	}
	283
	284	/**
	285	* snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
	286	*
	287	* @jack: ASoC jack
	288	* @count: number of pins
	289	* @gpios: array of gpio pins
	290	*
	291	* This function will request gpio, set data direction and request irq
	292	* for each gpio in the array.
	293	*/
	294	int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
	295	struct snd_soc_jack_gpio *gpios)
	296	{
	297	int i, ret;
	298
	299	for (i = 0; i < count; i++) {
	300	if (!gpio_is_valid(gpios[i].gpio)) {
	301	printk(KERN_ERR "Invalid gpio %d\n",
	302	gpios[i].gpio);
	303	ret = -EINVAL;
	304	goto undo;
	305	}
	306	if (!gpios[i].name) {
	307	printk(KERN_ERR "No name for gpio %d\n",
	308	gpios[i].gpio);
	309	ret = -EINVAL;
	310	goto undo;
	311	}
	312
	313	ret = gpio_request(gpios[i].gpio, gpios[i].name);
	314	if (ret)
	315	goto undo;
	316
	317	ret = gpio_direction_input(gpios[i].gpio);
	318	if (ret)
	319	goto err;
	320
4c14d78e	321	INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
b8e22c1f LPC	322	gpios[i].jack = jack;
b8e22c1f LPC	323
3f58fd84 MB	324	ret = request_any_context_irq(gpio_to_irq(gpios[i].gpio),
	325	gpio_handler,
	326	IRQF_TRIGGER_RISING \|
	327	IRQF_TRIGGER_FALLING,
	328	jack->codec->dev->driver->name,
	329	&gpios[i]);
ec67624d LCM	330	if (ret)
	331	goto err;
	332
7887ab3a MB	333	if (gpios[i].wake) {
	334	ret = set_irq_wake(gpio_to_irq(gpios[i].gpio), 1);
	335	if (ret != 0)
	336	printk(KERN_ERR
	337	"Failed to mark GPIO %d as wake source: %d\n",
	338	gpios[i].gpio, ret);
	339	}
	340
178b699c JK	341	#ifdef CONFIG_GPIO_SYSFS
	342	/* Expose GPIO value over sysfs for diagnostic purposes */
	343	gpio_export(gpios[i].gpio, false);
	344	#endif
	345
178b699c JK	346	/* Update initial jack status */
178b699c JK	347	snd_soc_jack_gpio_detect(&gpios[i]);
ec67624d LCM	348	}
	349
	350	return 0;
	351
	352	err:
	353	gpio_free(gpios[i].gpio);
	354	undo:
	355	snd_soc_jack_free_gpios(jack, i, gpios);
	356
	357	return ret;
	358	}
	359	EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);
	360
	361	/**
	362	* snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
	363	*
	364	* @jack: ASoC jack
	365	* @count: number of pins
	366	* @gpios: array of gpio pins
	367	*
	368	* Release gpio and irq resources for gpio pins associated with an ASoC jack.
	369	*/
	370	void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
	371	struct snd_soc_jack_gpio *gpios)
	372	{
	373	int i;
	374
	375	for (i = 0; i < count; i++) {
178b699c JK	376	#ifdef CONFIG_GPIO_SYSFS
	377	gpio_unexport(gpios[i].gpio);
	378	#endif
ec67624d	379	free_irq(gpio_to_irq(gpios[i].gpio), &gpios[i]);
4c14d78e	380	cancel_delayed_work_sync(&gpios[i].work);
ec67624d LCM	381	gpio_free(gpios[i].gpio);
	382	gpios[i].jack = NULL;
	383	}
	384	}
	385	EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
	386	#endif /* CONFIG_GPIOLIB */