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Commit 70e3e56e authored by Jacob Siverskog's avatar Jacob Siverskog Committed by Mark Brown
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ASoC: pcm179x: Add I2C interface driver 



The PCM179x family supports both SPI and I2C. This patch adds support
for the I2C interface.

Signed-off-by: default avatarJacob Siverskog <jacob@teenage.engineering>
Reviewed-by: default avatarJohan Hovold <johan@kernel.org>
Acked-by: default avatarMichael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 1b347b68

Documentation/devicetree/bindings/sound/pcm179x.txt

+10 −1
Original line number Diff line number Diff line 
Texas Instruments pcm179x DT bindings



This driver supports the SPI bus.

This driver supports both the I2C and SPI bus.



Required properties:
@@ -9,6 +9,11 @@ Required properties: 
For required properties on SPI, please consult

Documentation/devicetree/bindings/spi/spi-bus.txt



Required properties on I2C:



 - reg: the I2C address





Examples:



	codec_spi: 1792a@0 {
@@ -16,3 +21,7 @@ Examples: 
		spi-max-frequency = <600000>;

	};



	codec_i2c: 1792a@4c {

		compatible = "ti,pcm1792a";

		reg = <0x4c>;

	};

sound/soc/codecs/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_ML26124 if I2C

	select SND_SOC_NAU8825 if I2C

	select SND_SOC_PCM1681 if I2C

	select SND_SOC_PCM179X_I2C if I2C

	select SND_SOC_PCM179X_SPI if SPI_MASTER

	select SND_SOC_PCM3008

	select SND_SOC_PCM3168A_I2C if I2C
@@ -529,6 +530,14 @@ config SND_SOC_PCM1681 
config SND_SOC_PCM179X

	tristate



config SND_SOC_PCM179X_I2C

	tristate "Texas Instruments PCM179X CODEC (I2C)"

	depends on I2C

	select SND_SOC_PCM179X

	help

	  Enable support for Texas Instruments PCM179x CODEC.

	  Select this if your PCM179x is connected via an I2C bus.



config SND_SOC_PCM179X_SPI

	tristate "Texas Instruments PCM179X CODEC (SPI)"

	depends on SPI_MASTER

sound/soc/codecs/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ snd-soc-ml26124-objs := ml26124.o 
snd-soc-nau8825-objs := nau8825.o

snd-soc-pcm1681-objs := pcm1681.o

snd-soc-pcm179x-codec-objs := pcm179x.o

snd-soc-pcm179x-i2c-objs := pcm179x-i2c.o

snd-soc-pcm179x-spi-objs := pcm179x-spi.o

snd-soc-pcm3008-objs := pcm3008.o

snd-soc-pcm3168a-objs := pcm3168a.o
@@ -286,6 +287,7 @@ obj-$(CONFIG_SND_SOC_ML26124) += snd-soc-ml26124.o 
obj-$(CONFIG_SND_SOC_NAU8825)   += snd-soc-nau8825.o

obj-$(CONFIG_SND_SOC_PCM1681)	+= snd-soc-pcm1681.o

obj-$(CONFIG_SND_SOC_PCM179X)	+= snd-soc-pcm179x-codec.o

obj-$(CONFIG_SND_SOC_PCM179X_I2C)	+= snd-soc-pcm179x-i2c.o

obj-$(CONFIG_SND_SOC_PCM179X_SPI)	+= snd-soc-pcm179x-spi.o

obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o

obj-$(CONFIG_SND_SOC_PCM3168A)	+= snd-soc-pcm3168a.o

sound/soc/codecs/pcm179x-i2c.c

0 → 100644
+73 −0
Original line number Diff line number Diff line 
/*

 * PCM179X ASoC I2C driver

 *

 * Copyright (c) Teenage Engineering AB 2016

 *

 *     Jacob Siverskog <jacob@teenage.engineering>

 *

 * 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.

 */



#include <linux/module.h>

#include <linux/of.h>

#include <linux/i2c.h>

#include <linux/regmap.h>



#include "pcm179x.h"



static int pcm179x_i2c_probe(struct i2c_client *client,

			      const struct i2c_device_id *id)

{

	struct regmap *regmap;

	int ret;



	regmap = devm_regmap_init_i2c(client, &pcm179x_regmap_config);

	if (IS_ERR(regmap)) {

		ret = PTR_ERR(regmap);

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

		return ret;

	}



	return pcm179x_common_init(&client->dev, regmap);

}



static int pcm179x_i2c_remove(struct i2c_client *client)

{

	return pcm179x_common_exit(&client->dev);

}



static const struct of_device_id pcm179x_of_match[] = {

	{ .compatible = "ti,pcm1792a", },

	{ }

};

MODULE_DEVICE_TABLE(of, pcm179x_of_match);



static const struct i2c_device_id pcm179x_i2c_ids[] = {

	{ "pcm179x", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, pcm179x_i2c_ids);



static struct i2c_driver pcm179x_i2c_driver = {

	.driver = {

		.name	= "pcm179x",

		.of_match_table = of_match_ptr(pcm179x_of_match),

	},

	.id_table	= pcm179x_i2c_ids,

	.probe		= pcm179x_i2c_probe,

	.remove		= pcm179x_i2c_remove,

};



module_i2c_driver(pcm179x_i2c_driver);



MODULE_DESCRIPTION("ASoC PCM179X I2C driver");

MODULE_AUTHOR("Jacob Siverskog <jacob@teenage.engineering>");

MODULE_LICENSE("GPL");