Commit 4fa89346 authored by Daniel Mack's avatar Daniel Mack Committed by Mark Brown
Browse files

ALSA: ASoC: add codec driver for TI TAS5086 



This patch adds a driver for TI's TA5086 6-channel PWM processor.

This chip has a very unusual register layout, specifically because the
registers are of unequal size, and multi-byte registers require bulk
writes to take effect. Regmap does not support these kind of mappings.

Currently, the driver does not touch any of the registers >= 0x20, so
it doesn't matter, because the register map is mapped to an 8-bit array.
In case more features will be added in the future that require access
to higher registers, the entire regmap H/W I/O routines have to be
open-coded.

Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 6dbe51c2

Documentation/devicetree/bindings/sound/ti,tas5086.txt

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Texas Instruments TAS5086 6-channel PWM Processor



Required properties:



 - compatible:		Should contain "ti,tas5086".

 - reg:			The i2c address. Should contain <0x1b>.



Optional properties:



 - reset-gpio: 		A GPIO spec to define which pin is connected to the

			chip's !RESET pin. If specified, the driver will

			assert a hardware reset at probe time.



 - ti,charge-period:	This property should contain the time in microseconds

			that closely matches the external single-ended

			split-capacitor charge period. The hardware chip

			waits for this period of time before starting the

			PWM signals. This helps reduce pops and clicks.



			When not specified, the hardware default of 1300ms

			is retained.



Examples:



	i2c_bus {

		tas5086@1b {

			compatible = "ti,tas5086";

			reg = <0x1b>;

			reset-gpio = <&gpio 23 0>;

			ti,charge-period = <156000>;

		};

	};

include/sound/tas5086.h

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#ifndef _SND_SOC_CODEC_TAS5086_H_

#define _SND_SOC_CODEC_TAS5086_H_



#define TAS5086_CLK_IDX_MCLK	0

#define TAS5086_CLK_IDX_SCLK	1



#endif /* _SND_SOC_CODEC_TAS5086_H_ */

sound/soc/codecs/Kconfig

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@@ -63,6 +63,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_STA32X if I2C

	select SND_SOC_STA529 if I2C

	select SND_SOC_STAC9766 if SND_SOC_AC97_BUS

	select SND_SOC_TAS5086 if I2C

	select SND_SOC_TLV320AIC23 if I2C

	select SND_SOC_TLV320AIC26 if SPI_MASTER

	select SND_SOC_TLV320AIC32X4 if I2C
@@ -320,6 +321,9 @@ config SND_SOC_STA529 
config SND_SOC_STAC9766

	tristate



config SND_SOC_TAS5086

	tristate



config SND_SOC_TLV320AIC23

	tristate

sound/soc/codecs/Makefile

+2 −0
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@@ -55,6 +55,7 @@ snd-soc-ssm2602-objs := ssm2602.o 
snd-soc-sta32x-objs := sta32x.o

snd-soc-sta529-objs := sta529.o

snd-soc-stac9766-objs := stac9766.o

snd-soc-tas5086-objs := tas5086.o

snd-soc-tlv320aic23-objs := tlv320aic23.o

snd-soc-tlv320aic26-objs := tlv320aic26.o

snd-soc-tlv320aic3x-objs := tlv320aic3x.o
@@ -177,6 +178,7 @@ obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o 
obj-$(CONFIG_SND_SOC_STA32X)   += snd-soc-sta32x.o

obj-$(CONFIG_SND_SOC_STA529)   += snd-soc-sta529.o

obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o

obj-$(CONFIG_SND_SOC_TAS5086)	+= snd-soc-tas5086.o

obj-$(CONFIG_SND_SOC_TLV320AIC23)	+= snd-soc-tlv320aic23.o

obj-$(CONFIG_SND_SOC_TLV320AIC26)	+= snd-soc-tlv320aic26.o

obj-$(CONFIG_SND_SOC_TLV320AIC3X)	+= snd-soc-tlv320aic3x.o

sound/soc/codecs/tas5086.c

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/*

 * TAS5086 ASoC codec driver

 *

 * Copyright (c) 2013 Daniel Mack <zonque@gmail.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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * TODO:

 *  - implement DAPM and input muxing

 *  - implement modulation limit

 *  - implement non-default PWM start

 *

 * Note that this chip has a very unusual register layout, specifically

 * because the registers are of unequal size, and multi-byte registers

 * require bulk writes to take effect. Regmap does not support that kind

 * of devices.

 *

 * Currently, the driver does not touch any of the registers >= 0x20, so

 * it doesn't matter because the entire map can be accessed as 8-bit

 * array. In case more features will be added in the future

 * that require access to higher registers, the entire regmap H/W I/O

 * routines have to be open-coded.

 */



#include <linux/module.h>

#include <linux/slab.h>

#include <linux/delay.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/regmap.h>

#include <linux/spi/spi.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/tlv.h>

#include <sound/tas5086.h>



#define TAS5086_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE  |		\

			     SNDRV_PCM_FMTBIT_S20_3LE |		\

			     SNDRV_PCM_FMTBIT_S24_3LE)



#define TAS5086_PCM_RATES   (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100  | \

			     SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200  | \

			     SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \

			     SNDRV_PCM_RATE_192000)



/*

 * TAS5086 registers

 */

#define TAS5086_CLOCK_CONTROL		0x00	/* Clock control register  */

#define TAS5086_CLOCK_RATE(val)		(val << 5)

#define TAS5086_CLOCK_RATE_MASK		(0x7 << 5)

#define TAS5086_CLOCK_RATIO(val)	(val << 2)

#define TAS5086_CLOCK_RATIO_MASK	(0x7 << 2)

#define TAS5086_CLOCK_SCLK_RATIO_48	(1 << 1)

#define TAS5086_CLOCK_VALID		(1 << 0)



#define TAS5086_DEEMPH_MASK		0x03

#define TAS5086_SOFT_MUTE_ALL		0x3f



#define TAS5086_DEV_ID			0x01	/* Device ID register */

#define TAS5086_ERROR_STATUS		0x02	/* Error status register */

#define TAS5086_SYS_CONTROL_1		0x03	/* System control register 1 */

#define TAS5086_SERIAL_DATA_IF		0x04	/* Serial data interface register  */

#define TAS5086_SYS_CONTROL_2		0x05	/* System control register 2 */

#define TAS5086_SOFT_MUTE		0x06	/* Soft mute register */

#define TAS5086_MASTER_VOL		0x07	/* Master volume  */

#define TAS5086_CHANNEL_VOL(X)		(0x08 + (X))	/* Channel 1-6 volume */

#define TAS5086_VOLUME_CONTROL		0x09	/* Volume control register */

#define TAS5086_MOD_LIMIT		0x10	/* Modulation limit register */

#define TAS5086_PWM_START		0x18	/* PWM start register */

#define TAS5086_SURROUND		0x19	/* Surround register */

#define TAS5086_SPLIT_CAP_CHARGE	0x1a	/* Split cap charge period register */

#define TAS5086_OSC_TRIM		0x1b	/* Oscillator trim register */

#define TAS5086_BKNDERR 		0x1c



/*

 * Default TAS5086 power-up configuration

 */

static const struct reg_default tas5086_reg_defaults[] = {

	{ 0x00,	0x6c },

	{ 0x01,	0x03 },

	{ 0x02,	0x00 },

	{ 0x03,	0xa0 },

	{ 0x04,	0x05 },

	{ 0x05,	0x60 },

	{ 0x06,	0x00 },

	{ 0x07,	0xff },

	{ 0x08,	0x30 },

	{ 0x09,	0x30 },

	{ 0x0a,	0x30 },

	{ 0x0b,	0x30 },

	{ 0x0c,	0x30 },

	{ 0x0d,	0x30 },

	{ 0x0e,	0xb1 },

	{ 0x0f,	0x00 },

	{ 0x10,	0x02 },

	{ 0x11,	0x00 },

	{ 0x12,	0x00 },

	{ 0x13,	0x00 },

	{ 0x14,	0x00 },

	{ 0x15,	0x00 },

	{ 0x16,	0x00 },

	{ 0x17,	0x00 },

	{ 0x18,	0x3f },

	{ 0x19,	0x00 },

	{ 0x1a,	0x18 },

	{ 0x1b,	0x82 },

	{ 0x1c,	0x05 },

};



static bool tas5086_accessible_reg(struct device *dev, unsigned int reg)

{

	return !((reg == 0x0f) || (reg >= 0x11 && reg <= 0x17));

}



static bool tas5086_volatile_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case TAS5086_DEV_ID:

	case TAS5086_ERROR_STATUS:

		return true;

	}



	return false;

}



static bool tas5086_writeable_reg(struct device *dev, unsigned int reg)

{

	return tas5086_accessible_reg(dev, reg) && (reg != TAS5086_DEV_ID);

}



struct tas5086_private {

	struct regmap	*regmap;

	unsigned int	mclk, sclk;

	unsigned int	format;

	bool		deemph;

	/* Current sample rate for de-emphasis control */

	int		rate;

	/* GPIO driving Reset pin, if any */

	int		gpio_nreset;

};



static int tas5086_deemph[] = { 0, 32000, 44100, 48000 };



static int tas5086_set_deemph(struct snd_soc_codec *codec)

{

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);

	int i, val = 0;



	if (priv->deemph)

		for (i = 0; i < ARRAY_SIZE(tas5086_deemph); i++)

			if (tas5086_deemph[i] == priv->rate)

				val = i;



	return regmap_update_bits(priv->regmap, TAS5086_SYS_CONTROL_1,

				  TAS5086_DEEMPH_MASK, val);

}



static int tas5086_get_deemph(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	ucontrol->value.enumerated.item[0] = priv->deemph;



	return 0;

}



static int tas5086_put_deemph(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	priv->deemph = ucontrol->value.enumerated.item[0];



	return tas5086_set_deemph(codec);

}





static int tas5086_set_dai_sysclk(struct snd_soc_dai *codec_dai,

				  int clk_id, unsigned int freq, int dir)

{

	struct snd_soc_codec *codec = codec_dai->codec;

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	switch (clk_id) {

	case TAS5086_CLK_IDX_MCLK:

		priv->mclk = freq;

		break;

	case TAS5086_CLK_IDX_SCLK:

		priv->sclk = freq;

		break;

	}



	return 0;

}



static int tas5086_set_dai_fmt(struct snd_soc_dai *codec_dai,

			       unsigned int format)

{

	struct snd_soc_codec *codec = codec_dai->codec;

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	/* The TAS5086 can only be slave to all clocks */

	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {

		dev_err(codec->dev, "Invalid clocking mode\n");

		return -EINVAL;

	}



	/* we need to refer to the data format from hw_params() */

	priv->format = format;



	return 0;

}



static const int tas5086_sample_rates[] = {

	32000, 38000, 44100, 48000, 88200, 96000, 176400, 192000

};



static const int tas5086_ratios[] = {

	64, 128, 192, 256, 384, 512

};



static int index_in_array(const int *array, int len, int needle)

{

	int i;



	for (i = 0; i < len; i++)

		if (array[i] == needle)

			return i;



	return -ENOENT;

}



static int tas5086_hw_params(struct snd_pcm_substream *substream,

			     struct snd_pcm_hw_params *params,

			     struct snd_soc_dai *dai)

{

	struct snd_soc_codec *codec = dai->codec;

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);

	unsigned int val;

	int ret;



	priv->rate = params_rate(params);



	/* Look up the sample rate and refer to the offset in the list */

	val = index_in_array(tas5086_sample_rates,

			     ARRAY_SIZE(tas5086_sample_rates), priv->rate);



	if (val < 0) {

		dev_err(codec->dev, "Invalid sample rate\n");

		return -EINVAL;

	}



	ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,

				 TAS5086_CLOCK_RATE_MASK,

				 TAS5086_CLOCK_RATE(val));

	if (ret < 0)

		return ret;



	/* MCLK / Fs ratio */

	val = index_in_array(tas5086_ratios, ARRAY_SIZE(tas5086_ratios),

			     priv->mclk / priv->rate);

	if (val < 0) {

		dev_err(codec->dev, "Inavlid MCLK / Fs ratio\n");

		return -EINVAL;

	}



	ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,

				 TAS5086_CLOCK_RATIO_MASK,

				 TAS5086_CLOCK_RATIO(val));

	if (ret < 0)

		return ret;





	ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,

				 TAS5086_CLOCK_SCLK_RATIO_48,

				 (priv->sclk == 48 * priv->rate) ? 

					TAS5086_CLOCK_SCLK_RATIO_48 : 0);

	if (ret < 0)

		return ret;



	/*

	 * The chip has a very unituitive register mapping and muxes information

	 * about data format and sample depth into the same register, but not on

	 * a logical bit-boundary. Hence, we have to refer to the format passed

	 * in the set_dai_fmt() callback and set up everything from here.

	 *

	 * First, determine the 'base' value, using the format ...

	 */

	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_RIGHT_J:

		val = 0x00;

		break;

	case SND_SOC_DAIFMT_I2S:

		val = 0x03;

		break;

	case SND_SOC_DAIFMT_LEFT_J:

		val = 0x06;

		break;

	default:

		dev_err(codec->dev, "Invalid DAI format\n");

		return -EINVAL;

	}



	/* ... then add the offset for the sample bit depth. */

	switch (params_format(params)) {

        case SNDRV_PCM_FORMAT_S16_LE:

		val += 0;

                break;

	case SNDRV_PCM_FORMAT_S20_3LE:

		val += 1;

		break;

	case SNDRV_PCM_FORMAT_S24_3LE:

		val += 2;

		break;

	default:

		dev_err(codec->dev, "Invalid bit width\n");

		return -EINVAL;

	};



	ret = regmap_write(priv->regmap, TAS5086_SERIAL_DATA_IF, val);

	if (ret < 0)

		return ret;



	/* clock is considered valid now */

	ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,

				 TAS5086_CLOCK_VALID, TAS5086_CLOCK_VALID);

	if (ret < 0)

		return ret;



	return tas5086_set_deemph(codec);

}



static int tas5086_mute_stream(struct snd_soc_dai *dai, int mute, int stream)

{

	struct snd_soc_codec *codec = dai->codec;

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);

	unsigned int val = 0;



	if (mute)

		val = TAS5086_SOFT_MUTE_ALL;



	return regmap_write(priv->regmap, TAS5086_SOFT_MUTE, val);

}



/* TAS5086 controls */

static const DECLARE_TLV_DB_SCALE(tas5086_dac_tlv, -10350, 50, 1);



static const struct snd_kcontrol_new tas5086_controls[] = {

	SOC_SINGLE_TLV("Master Playback Volume", TAS5086_MASTER_VOL,

		       0, 0xff, 1, tas5086_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",

			 TAS5086_CHANNEL_VOL(0), TAS5086_CHANNEL_VOL(1),

			 0, 0xff, 1, tas5086_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",

			 TAS5086_CHANNEL_VOL(2), TAS5086_CHANNEL_VOL(3),

			 0, 0xff, 1, tas5086_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",

			 TAS5086_CHANNEL_VOL(4), TAS5086_CHANNEL_VOL(5),

			 0, 0xff, 1, tas5086_dac_tlv),

	SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,

			    tas5086_get_deemph, tas5086_put_deemph),

};



static const struct snd_soc_dai_ops tas5086_dai_ops = {

	.hw_params	= tas5086_hw_params,

	.set_sysclk	= tas5086_set_dai_sysclk,

	.set_fmt	= tas5086_set_dai_fmt,

	.mute_stream	= tas5086_mute_stream,

};



static struct snd_soc_dai_driver tas5086_dai = {

	.name = "tas5086-hifi",

	.playback = {

		.stream_name	= "Playback",

		.channels_min	= 2,

		.channels_max	= 6,

		.rates		= TAS5086_PCM_RATES,

		.formats	= TAS5086_PCM_FORMATS,

	},

	.ops = &tas5086_dai_ops,

};



#ifdef CONFIG_PM

static int tas5086_soc_resume(struct snd_soc_codec *codec)

{

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	/* Restore codec state */

	return regcache_sync(priv->regmap);

}

#else

#define tas5086_soc_resume	NULL

#endif /* CONFIG_PM */



#ifdef CONFIG_OF

static const struct of_device_id tas5086_dt_ids[] = {

	{ .compatible = "ti,tas5086", },

	{ }

};

MODULE_DEVICE_TABLE(of, tas5086_dt_ids);

#endif



/* charge period values in microseconds */

static const int tas5086_charge_period[] = {

	  13000,  16900,   23400,   31200,   41600,   54600,   72800,   96200,

	 130000, 156000,  234000,  312000,  416000,  546000,  728000,  962000,

	1300000, 169000, 2340000, 3120000, 4160000, 5460000, 7280000, 9620000,

};



static int tas5086_probe(struct snd_soc_codec *codec)

{

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);

	int charge_period = 1300000; /* hardware default is 1300 ms */

	int i, ret;



	if (of_match_device(of_match_ptr(tas5086_dt_ids), codec->dev)) {

		struct device_node *of_node = codec->dev->of_node;

		of_property_read_u32(of_node, "ti,charge-period", &charge_period);

	}



	/* lookup and set split-capacitor charge period */

	if (charge_period == 0) {

		regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE, 0);

	} else {

		i = index_in_array(tas5086_charge_period,

				   ARRAY_SIZE(tas5086_charge_period),

				   charge_period);

		if (i >= 0)

			regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE,

				     i + 0x08);

		else

			dev_warn(codec->dev,

				 "Invalid split-cap charge period of %d ns.\n",

				 charge_period);

	}



	/* enable factory trim */

	ret = regmap_write(priv->regmap, TAS5086_OSC_TRIM, 0x00);

	if (ret < 0)

		return ret;



	/* start all channels */

	ret = regmap_write(priv->regmap, TAS5086_SYS_CONTROL_2, 0x20);

	if (ret < 0)

		return ret;



	/* set master volume to 0 dB */

	ret = regmap_write(priv->regmap, TAS5086_MASTER_VOL, 0x30);

	if (ret < 0)

		return ret;



	/* mute all channels for now */

	ret = regmap_write(priv->regmap, TAS5086_SOFT_MUTE,

			   TAS5086_SOFT_MUTE_ALL);

	if (ret < 0)

		return ret;



	return 0;

}



static int tas5086_remove(struct snd_soc_codec *codec)

{

	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);



	if (gpio_is_valid(priv->gpio_nreset))

		/* Set codec to the reset state */

		gpio_set_value(priv->gpio_nreset, 0);



	return 0;

};



static struct snd_soc_codec_driver soc_codec_dev_tas5086 = {

	.probe			= tas5086_probe,

	.remove			= tas5086_remove,

	.resume			= tas5086_soc_resume,

	.controls		= tas5086_controls,

	.num_controls		= ARRAY_SIZE(tas5086_controls),

};



static const struct i2c_device_id tas5086_i2c_id[] = {

	{ "tas5086", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, tas5086_i2c_id);



static const struct regmap_config tas5086_regmap = {

	.reg_bits		= 8,

	.val_bits		= 8,

	.max_register		= ARRAY_SIZE(tas5086_reg_defaults),

	.reg_defaults		= tas5086_reg_defaults,

	.num_reg_defaults	= ARRAY_SIZE(tas5086_reg_defaults),

	.cache_type		= REGCACHE_RBTREE,

	.volatile_reg		= tas5086_volatile_reg,

	.writeable_reg		= tas5086_writeable_reg,

	.readable_reg		= tas5086_accessible_reg,

};



static int tas5086_i2c_probe(struct i2c_client *i2c,

			     const struct i2c_device_id *id)

{

	struct tas5086_private *priv;

	struct device *dev = &i2c->dev;

	int gpio_nreset = -EINVAL;

	int i, ret;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->regmap = devm_regmap_init_i2c(i2c, &tas5086_regmap);

	if (IS_ERR(priv->regmap)) {

		ret = PTR_ERR(priv->regmap);

		dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);

		return ret;

	}



	i2c_set_clientdata(i2c, priv);



	if (of_match_device(of_match_ptr(tas5086_dt_ids), dev)) {

		struct device_node *of_node = dev->of_node;

		gpio_nreset = of_get_named_gpio(of_node, "reset-gpio", 0);

	}



	if (gpio_is_valid(gpio_nreset))

		if (devm_gpio_request(dev, gpio_nreset, "TAS5086 Reset"))

			gpio_nreset = -EINVAL;



	if (gpio_is_valid(gpio_nreset)) {

		/* Reset codec - minimum assertion time is 400ns */

		gpio_direction_output(gpio_nreset, 0);

		udelay(1);

		gpio_set_value(gpio_nreset, 1);



		/* Codec needs ~15ms to wake up */

		msleep(15);

	}



	priv->gpio_nreset = gpio_nreset;



	/* The TAS5086 always returns 0x03 in its TAS5086_DEV_ID register */

	ret = regmap_read(priv->regmap, TAS5086_DEV_ID, &i);

	if (ret < 0)

		return ret;



	if (i != 0x3) {

		dev_err(dev,

			"Failed to identify TAS5086 codec (got %02x)\n", i);

		return -ENODEV;

	}



	return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_tas5086,

		&tas5086_dai, 1);

}



static int tas5086_i2c_remove(struct i2c_client *i2c)

{

	snd_soc_unregister_codec(&i2c->dev);

	return 0;

}



static struct i2c_driver tas5086_i2c_driver = {

	.driver = {

		.name	= "tas5086",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(tas5086_dt_ids),

	},

	.id_table	= tas5086_i2c_id,

	.probe		= tas5086_i2c_probe,

	.remove		= tas5086_i2c_remove,

};



static int __init tas5086_modinit(void)

{

	return i2c_add_driver(&tas5086_i2c_driver);

}

module_init(tas5086_modinit);



static void __exit tas5086_modexit(void)

{

	i2c_del_driver(&tas5086_i2c_driver);

}

module_exit(tas5086_modexit);



MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>");

MODULE_DESCRIPTION("Texas Instruments TAS5086 ALSA SoC Codec Driver");

MODULE_LICENSE("GPL");

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