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Commit 336b8423 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Mark Brown
Browse files

ASoC: Move AC'97 support to its own file 



Currently the AC'97 support is splattered all throughout soc-core.c. Some
parts are #ifdef'd some parts are not. This patch moves the AC'97 support to
its own file, this should make the code a bit more clearer and also makes it
possible to easily not compile it into the kernel when not needed.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 70f3af3c

include/sound/soc.h

+26 −2
Original line number Diff line number Diff line
@@ -366,8 +366,6 @@ struct snd_soc_jack_gpio; 


typedef int (*hw_write_t)(void *,const char* ,int);



extern struct snd_ac97_bus_ops *soc_ac97_ops;



enum snd_soc_pcm_subclass {

	SND_SOC_PCM_CLASS_PCM	= 0,

	SND_SOC_PCM_CLASS_BE	= 1,
@@ -500,6 +498,7 @@ int snd_soc_update_bits_locked(struct snd_soc_codec *codec, 
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned int reg,

				unsigned int mask, unsigned int value);



#ifdef CONFIG_SND_SOC_AC97_BUS

int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,

	struct snd_ac97_bus_ops *ops, int num);

void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
@@ -508,6 +507,31 @@ int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops); 
int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,

		struct platform_device *pdev);



extern struct snd_ac97_bus_ops *soc_ac97_ops;



int snd_soc_ac97_register_dai_links(struct snd_soc_card *card);

void snd_soc_ac97_add_pdata(struct snd_soc_pcm_runtime *rtd);

#else



static inline int snd_soc_ac97_register_dai_links(struct snd_soc_card *card)

{

	return 0;

}



static inline void snd_soc_ac97_add_pdata(struct snd_soc_pcm_runtime *rtd) {}



static inline int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,

	struct platform_device *pdev)

{

	return 0;

}



static inline int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)

{

	return 0;

}

#endif



/*

 *Controls

 */

sound/soc/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -5,6 +5,10 @@ ifneq ($(CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM),) 
snd-soc-core-objs += soc-generic-dmaengine-pcm.o

endif



ifneq ($(CONFIG_SND_SOC_AC97_BUS),)

snd-soc-core-objs += soc-ac97.o

endif



obj-$(CONFIG_SND_SOC)	+= snd-soc-core.o

obj-$(CONFIG_SND_SOC)	+= codecs/

obj-$(CONFIG_SND_SOC)	+= generic/

sound/soc/soc-ac97.c

0 → 100644
+382 −0
Original line number Diff line number Diff line 
/*

 * soc-ac97.c  --  ALSA SoC Audio Layer AC97 support

 *

 * Copyright 2005 Wolfson Microelectronics PLC.

 * Copyright 2005 Openedhand Ltd.

 * Copyright (C) 2010 Slimlogic Ltd.

 * Copyright (C) 2010 Texas Instruments Inc.

 *

 * Author: Liam Girdwood <lrg@slimlogic.co.uk>

 *         with code, comments and ideas from :-

 *         Richard Purdie <richard@openedhand.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 <linux/ctype.h>

#include <linux/delay.h>

#include <linux/export.h>

#include <linux/gpio.h>

#include <linux/init.h>

#include <linux/of_gpio.h>

#include <linux/of.h>

#include <linux/pinctrl/consumer.h>

#include <linux/slab.h>

#include <sound/ac97_codec.h>

#include <sound/soc.h>



struct snd_ac97_reset_cfg {

	struct pinctrl *pctl;

	struct pinctrl_state *pstate_reset;

	struct pinctrl_state *pstate_warm_reset;

	struct pinctrl_state *pstate_run;

	int gpio_sdata;

	int gpio_sync;

	int gpio_reset;

};



/* unregister ac97 codec */

static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)

{

	if (codec->ac97->dev.bus)

		device_del(&codec->ac97->dev);

	return 0;

}



/* register ac97 codec to bus */

static int soc_ac97_dev_register(struct snd_soc_codec *codec)

{

	int err;



	codec->ac97->dev.bus = &ac97_bus_type;

	codec->ac97->dev.parent = codec->component.card->dev;



	dev_set_name(&codec->ac97->dev, "%d-%d:%s",

		     codec->component.card->snd_card->number, 0,

		     codec->component.name);

	err = device_add(&codec->ac97->dev);

	if (err < 0) {

		dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");

		codec->ac97->dev.bus = NULL;

		return err;

	}

	return 0;

}



static int soc_register_ac97_codec(struct snd_soc_codec *codec,

				   struct snd_soc_dai *codec_dai)

{

	int ret;



	/* Only instantiate AC97 if not already done by the adaptor

	 * for the generic AC97 subsystem.

	 */

	if (codec_dai->driver->ac97_control && !codec->ac97_registered) {

		/*

		 * It is possible that the AC97 device is already registered to

		 * the device subsystem. This happens when the device is created

		 * via snd_ac97_mixer(). Currently only SoC codec that does so

		 * is the generic AC97 glue but others migh emerge.

		 *

		 * In those cases we don't try to register the device again.

		 */

		if (!codec->ac97_created)

			return 0;



		ret = soc_ac97_dev_register(codec);

		if (ret < 0) {

			dev_err(codec->dev,

				"ASoC: AC97 device register failed: %d\n", ret);

			return ret;

		}



		codec->ac97_registered = 1;

	}

	return 0;

}



static void soc_unregister_ac97_codec(struct snd_soc_codec *codec)

{

	if (codec->ac97_registered) {

		soc_ac97_dev_unregister(codec);

		codec->ac97_registered = 0;

	}

}



static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)

{

	int i, ret;



	for (i = 0; i < rtd->num_codecs; i++) {

		struct snd_soc_dai *codec_dai = rtd->codec_dais[i];



		ret = soc_register_ac97_codec(codec_dai->codec, codec_dai);

		if (ret) {

			while (--i >= 0)

				soc_unregister_ac97_codec(codec_dai->codec);

			return ret;

		}

	}



	return 0;

}



static void soc_unregister_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)

{

	int i;



	for (i = 0; i < rtd->num_codecs; i++)

		soc_unregister_ac97_codec(rtd->codec_dais[i]->codec);

}



static void soc_ac97_device_release(struct device *dev)

{

	kfree(to_ac97_t(dev));

}



/**

 * snd_soc_new_ac97_codec - initailise AC97 device

 * @codec: audio codec

 * @ops: AC97 bus operations

 * @num: AC97 codec number

 *

 * Initialises AC97 codec resources for use by ad-hoc devices only.

 */

int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,

	struct snd_ac97_bus_ops *ops, int num)

{

	codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);

	if (codec->ac97 == NULL)

		return -ENOMEM;



	codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);

	if (codec->ac97->bus == NULL) {

		kfree(codec->ac97);

		codec->ac97 = NULL;

		return -ENOMEM;

	}



	codec->ac97->bus->ops = ops;

	codec->ac97->num = num;

	codec->ac97->dev.release = soc_ac97_device_release;



	/*

	 * Mark the AC97 device to be created by us. This way we ensure that the

	 * device will be registered with the device subsystem later on.

	 */

	codec->ac97_created = 1;

	device_initialize(&codec->ac97->dev);



	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);



/**

 * snd_soc_free_ac97_codec - free AC97 codec device

 * @codec: audio codec

 *

 * Frees AC97 codec device resources.

 */

void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)

{

	soc_unregister_ac97_codec(codec);

	kfree(codec->ac97->bus);

	codec->ac97->bus = NULL;

	put_device(&codec->ac97->dev);

	codec->ac97 = NULL;

	codec->ac97_created = 0;

}

EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);



static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;



static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)

{

	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);



	udelay(10);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);

	msleep(2);

}



static void snd_soc_ac97_reset(struct snd_ac97 *ac97)

{

	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);



	udelay(10);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);

	msleep(2);

}



static int snd_soc_ac97_parse_pinctl(struct device *dev,

		struct snd_ac97_reset_cfg *cfg)

{

	struct pinctrl *p;

	struct pinctrl_state *state;

	int gpio;

	int ret;



	p = devm_pinctrl_get(dev);

	if (IS_ERR(p)) {

		dev_err(dev, "Failed to get pinctrl\n");

		return PTR_ERR(p);

	}

	cfg->pctl = p;



	state = pinctrl_lookup_state(p, "ac97-reset");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-reset\n");

		return PTR_ERR(state);

	}

	cfg->pstate_reset = state;



	state = pinctrl_lookup_state(p, "ac97-warm-reset");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");

		return PTR_ERR(state);

	}

	cfg->pstate_warm_reset = state;



	state = pinctrl_lookup_state(p, "ac97-running");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-running\n");

		return PTR_ERR(state);

	}

	cfg->pstate_run = state;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-sync gpio\n");

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link sync");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-sync gpio\n");

		return ret;

	}

	cfg->gpio_sync = gpio;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link sdata");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-sdata gpio\n");

		return ret;

	}

	cfg->gpio_sdata = gpio;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-reset gpio\n");

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link reset");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-reset gpio\n");

		return ret;

	}

	cfg->gpio_reset = gpio;



	return 0;

}



struct snd_ac97_bus_ops *soc_ac97_ops;

EXPORT_SYMBOL_GPL(soc_ac97_ops);



int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)

{

	if (ops == soc_ac97_ops)

		return 0;



	if (soc_ac97_ops && ops)

		return -EBUSY;



	soc_ac97_ops = ops;



	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);



/**

 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions

 *

 * This function sets the reset and warm_reset properties of ops and parses

 * the device node of pdev to get pinctrl states and gpio numbers to use.

 */

int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,

		struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct snd_ac97_reset_cfg cfg;

	int ret;



	ret = snd_soc_ac97_parse_pinctl(dev, &cfg);

	if (ret)

		return ret;



	ret = snd_soc_set_ac97_ops(ops);

	if (ret)

		return ret;



	ops->warm_reset = snd_soc_ac97_warm_reset;

	ops->reset = snd_soc_ac97_reset;



	snd_ac97_rst_cfg = cfg;

	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);



int snd_soc_ac97_register_dai_links(struct snd_soc_card *card)

{

	int i;

	int ret;



	/* register any AC97 codecs */

	for (i = 0; i < card->num_rtd; i++) {

		ret = soc_register_ac97_dai_link(&card->rtd[i]);

		if (ret < 0)

			goto err;

	}



	return 0;

err:

	dev_err(card->dev,

		"ASoC: failed to register AC97: %d\n", ret);

	while (--i >= 0)

		soc_unregister_ac97_dai_link(&card->rtd[i]);

	return ret;

}



void snd_soc_ac97_add_pdata(struct snd_soc_pcm_runtime *rtd)

{

	unsigned int i;



	/* add platform data for AC97 devices */

	for (i = 0; i < rtd->num_codecs; i++) {

		if (rtd->codec_dais[i]->driver->ac97_control)

			snd_ac97_dev_add_pdata(rtd->codec_dais[i]->codec->ac97,

					       rtd->cpu_dai->ac97_pdata);

	}

}

sound/soc/soc-core.c

+4 −348
Original line number Diff line number Diff line
@@ -34,9 +34,6 @@ 
#include <linux/ctype.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/gpio.h>

#include <linux/of_gpio.h>

#include <sound/ac97_codec.h>

#include <sound/core.h>

#include <sound/jack.h>

#include <sound/pcm.h>
@@ -69,16 +66,6 @@ static int pmdown_time = 5000; 
module_param(pmdown_time, int, 0);

MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");



struct snd_ac97_reset_cfg {

	struct pinctrl *pctl;

	struct pinctrl_state *pstate_reset;

	struct pinctrl_state *pstate_warm_reset;

	struct pinctrl_state *pstate_run;

	int gpio_sdata;

	int gpio_sync;

	int gpio_reset;

};



/* returns the minimum number of bytes needed to represent

 * a particular given value */

static int min_bytes_needed(unsigned long val)
@@ -499,36 +486,6 @@ struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, 
}

EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);



#ifdef CONFIG_SND_SOC_AC97_BUS

/* unregister ac97 codec */

static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)

{

	if (codec->ac97->dev.bus)

		device_del(&codec->ac97->dev);

	return 0;

}



/* register ac97 codec to bus */

static int soc_ac97_dev_register(struct snd_soc_codec *codec)

{

	int err;



	codec->ac97->dev.bus = &ac97_bus_type;

	codec->ac97->dev.parent = codec->component.card->dev;



	dev_set_name(&codec->ac97->dev, "%d-%d:%s",

		     codec->component.card->snd_card->number, 0,

		     codec->component.name);

	err = device_add(&codec->ac97->dev);

	if (err < 0) {

		dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");

		codec->ac97->dev.bus = NULL;

		return err;

	}

	return 0;

}

#endif



static void codec2codec_close_delayed_work(struct work_struct *work)

{

	/* Currently nothing to do for c2c links
@@ -1418,84 +1375,11 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order) 
		}

	}



	/* add platform data for AC97 devices */

	for (i = 0; i < rtd->num_codecs; i++) {

		if (rtd->codec_dais[i]->driver->ac97_control)

			snd_ac97_dev_add_pdata(rtd->codec_dais[i]->codec->ac97,

					       rtd->cpu_dai->ac97_pdata);

	}



	return 0;

}



#ifdef CONFIG_SND_SOC_AC97_BUS

static int soc_register_ac97_codec(struct snd_soc_codec *codec,

				   struct snd_soc_dai *codec_dai)

{

	int ret;

	snd_soc_ac97_add_pdata(rtd);



	/* Only instantiate AC97 if not already done by the adaptor

	 * for the generic AC97 subsystem.

	 */

	if (codec_dai->driver->ac97_control && !codec->ac97_registered) {

		/*

		 * It is possible that the AC97 device is already registered to

		 * the device subsystem. This happens when the device is created

		 * via snd_ac97_mixer(). Currently only SoC codec that does so

		 * is the generic AC97 glue but others migh emerge.

		 *

		 * In those cases we don't try to register the device again.

		 */

		if (!codec->ac97_created)

	return 0;



		ret = soc_ac97_dev_register(codec);

		if (ret < 0) {

			dev_err(codec->dev,

				"ASoC: AC97 device register failed: %d\n", ret);

			return ret;

		}



		codec->ac97_registered = 1;

	}

	return 0;

}



static void soc_unregister_ac97_codec(struct snd_soc_codec *codec)

{

	if (codec->ac97_registered) {

		soc_ac97_dev_unregister(codec);

		codec->ac97_registered = 0;

	}

}



static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)

{

	int i, ret;



	for (i = 0; i < rtd->num_codecs; i++) {

		struct snd_soc_dai *codec_dai = rtd->codec_dais[i];



		ret = soc_register_ac97_codec(codec_dai->codec, codec_dai);

		if (ret) {

			while (--i >= 0)

				soc_unregister_ac97_codec(codec_dai->codec);

			return ret;

		}

	}



	return 0;

}



static void soc_unregister_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)

{

	int i;



	for (i = 0; i < rtd->num_codecs; i++)

		soc_unregister_ac97_codec(rtd->codec_dais[i]->codec);

}

#endif



static int soc_bind_aux_dev(struct snd_soc_card *card, int num)

{

	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
@@ -1789,19 +1673,9 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card) 
		goto probe_aux_dev_err;

	}



#ifdef CONFIG_SND_SOC_AC97_BUS

	/* register any AC97 codecs */

	for (i = 0; i < card->num_rtd; i++) {

		ret = soc_register_ac97_dai_link(&card->rtd[i]);

		if (ret < 0) {

			dev_err(card->dev,

				"ASoC: failed to register AC97: %d\n", ret);

			while (--i >= 0)

				soc_unregister_ac97_dai_link(&card->rtd[i]);

	ret = snd_soc_ac97_register_dai_links(card);

	if (ret < 0)

		goto probe_aux_dev_err;

		}

	}

#endif



	card->instantiated = 1;

	snd_soc_dapm_sync(&card->dapm);
@@ -1944,224 +1818,6 @@ static struct platform_driver soc_driver = { 
	.remove		= soc_remove,

};



static void soc_ac97_device_release(struct device *dev)

{

	kfree(to_ac97_t(dev));

}



/**

 * snd_soc_new_ac97_codec - initailise AC97 device

 * @codec: audio codec

 * @ops: AC97 bus operations

 * @num: AC97 codec number

 *

 * Initialises AC97 codec resources for use by ad-hoc devices only.

 */

int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,

	struct snd_ac97_bus_ops *ops, int num)

{

	codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);

	if (codec->ac97 == NULL)

		return -ENOMEM;



	codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);

	if (codec->ac97->bus == NULL) {

		kfree(codec->ac97);

		codec->ac97 = NULL;

		return -ENOMEM;

	}



	codec->ac97->bus->ops = ops;

	codec->ac97->num = num;

	codec->ac97->dev.release = soc_ac97_device_release;



	/*

	 * Mark the AC97 device to be created by us. This way we ensure that the

	 * device will be registered with the device subsystem later on.

	 */

	codec->ac97_created = 1;

	device_initialize(&codec->ac97->dev);



	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);



static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;



static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)

{

	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);



	udelay(10);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);

	msleep(2);

}



static void snd_soc_ac97_reset(struct snd_ac97 *ac97)

{

	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);



	udelay(10);



	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);



	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);

	msleep(2);

}



static int snd_soc_ac97_parse_pinctl(struct device *dev,

		struct snd_ac97_reset_cfg *cfg)

{

	struct pinctrl *p;

	struct pinctrl_state *state;

	int gpio;

	int ret;



	p = devm_pinctrl_get(dev);

	if (IS_ERR(p)) {

		dev_err(dev, "Failed to get pinctrl\n");

		return PTR_ERR(p);

	}

	cfg->pctl = p;



	state = pinctrl_lookup_state(p, "ac97-reset");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-reset\n");

		return PTR_ERR(state);

	}

	cfg->pstate_reset = state;



	state = pinctrl_lookup_state(p, "ac97-warm-reset");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");

		return PTR_ERR(state);

	}

	cfg->pstate_warm_reset = state;



	state = pinctrl_lookup_state(p, "ac97-running");

	if (IS_ERR(state)) {

		dev_err(dev, "Can't find pinctrl state ac97-running\n");

		return PTR_ERR(state);

	}

	cfg->pstate_run = state;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-sync gpio\n");

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link sync");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-sync gpio\n");

		return ret;

	}

	cfg->gpio_sync = gpio;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link sdata");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-sdata gpio\n");

		return ret;

	}

	cfg->gpio_sdata = gpio;



	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);

	if (gpio < 0) {

		dev_err(dev, "Can't find ac97-reset gpio\n");

		return gpio;

	}

	ret = devm_gpio_request(dev, gpio, "AC97 link reset");

	if (ret) {

		dev_err(dev, "Failed requesting ac97-reset gpio\n");

		return ret;

	}

	cfg->gpio_reset = gpio;



	return 0;

}



struct snd_ac97_bus_ops *soc_ac97_ops;

EXPORT_SYMBOL_GPL(soc_ac97_ops);



int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)

{

	if (ops == soc_ac97_ops)

		return 0;



	if (soc_ac97_ops && ops)

		return -EBUSY;



	soc_ac97_ops = ops;



	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);



/**

 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions

 *

 * This function sets the reset and warm_reset properties of ops and parses

 * the device node of pdev to get pinctrl states and gpio numbers to use.

 */

int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,

		struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct snd_ac97_reset_cfg cfg;

	int ret;



	ret = snd_soc_ac97_parse_pinctl(dev, &cfg);

	if (ret)

		return ret;



	ret = snd_soc_set_ac97_ops(ops);

	if (ret)

		return ret;



	ops->warm_reset = snd_soc_ac97_warm_reset;

	ops->reset = snd_soc_ac97_reset;



	snd_ac97_rst_cfg = cfg;

	return 0;

}

EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);



/**

 * snd_soc_free_ac97_codec - free AC97 codec device

 * @codec: audio codec

 *

 * Frees AC97 codec device resources.

 */

void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)

{

#ifdef CONFIG_SND_SOC_AC97_BUS

	soc_unregister_ac97_codec(codec);

#endif

	kfree(codec->ac97->bus);

	codec->ac97->bus = NULL;

	put_device(&codec->ac97->dev);

	codec->ac97 = NULL;

	codec->ac97_created = 0;

}

EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);



/**

 * snd_soc_cnew - create new control

 * @_template: control template