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ASoC: pcm179x: Add I2C interface driver

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

Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jacob Siverskog 2016-01-22 13:39:54 +01:00 committed by Mark Brown
parent 1b347b6891
commit 70e3e56e6c
4 changed files with 94 additions and 1 deletions
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11
Documentation/devicetree/bindings/sound/pcm179x.txt
View File

@ -1,6 +1,6 @@
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>;
};

9
sound/soc/codecs/Kconfig
View File

@ -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

2
sound/soc/codecs/Makefile
View File

@ -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

73
sound/soc/codecs/pcm179x-i2c.c Normal file
View File

@ -0,0 +1,73 @@
/*
* 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");