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