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ASoC: Add ADAU7002 Stereo PDM-to-I2S/TDM Converter driver

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This patch adds support for the ADAU7002 PDM-to-I2S/TDM converter. The
ADAU7002 takes a stereo PDM signal (e.g. from two digital microphones) and
converts it into a I2S/TDM PCM stream. The chip does not have a
programmable control interface and the driver simply describes the static
capabilities of the chip.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2016-06-02 14:19:42 +02:00 committed by Mark Brown
parent 254a13811e
commit a0d3546cf9
3 changed files with 86 additions and 0 deletions
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4
sound/soc/codecs/Kconfig
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@ -32,6 +32,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_ADAU1977_SPI if SPI_MASTER
select SND_SOC_ADAU1977_I2C if I2C
select SND_SOC_ADAU1701 if I2C
select SND_SOC_ADAU7002
select SND_SOC_ADS117X
select SND_SOC_AK4104 if SPI_MASTER
select SND_SOC_AK4535 if I2C
@ -322,6 +323,9 @@ config SND_SOC_ADAU1977_I2C
select SND_SOC_ADAU1977
select REGMAP_I2C
config SND_SOC_ADAU7002
tristate "Analog Devices ADAU7002 Stereo PDM-to-I2S/TDM Converter"
config SND_SOC_ADAV80X
tristate

2
sound/soc/codecs/Makefile
View File

@ -19,6 +19,7 @@ snd-soc-adau1781-spi-objs := adau1781-spi.o
snd-soc-adau1977-objs := adau1977.o
snd-soc-adau1977-spi-objs := adau1977-spi.o
snd-soc-adau1977-i2c-objs := adau1977-i2c.o
snd-soc-adau7002-objs := adau7002.o
snd-soc-adav80x-objs := adav80x.o
snd-soc-adav801-objs := adav801.o
snd-soc-adav803-objs := adav803.o
@ -232,6 +233,7 @@ obj-$(CONFIG_SND_SOC_ADAU1781_SPI) += snd-soc-adau1781-spi.o
obj-$(CONFIG_SND_SOC_ADAU1977) += snd-soc-adau1977.o
obj-$(CONFIG_SND_SOC_ADAU1977_SPI) += snd-soc-adau1977-spi.o
obj-$(CONFIG_SND_SOC_ADAU1977_I2C) += snd-soc-adau1977-i2c.o
obj-$(CONFIG_SND_SOC_ADAU7002) += snd-soc-adau7002.o
obj-$(CONFIG_SND_SOC_ADAV80X) += snd-soc-adav80x.o
obj-$(CONFIG_SND_SOC_ADAV801) += snd-soc-adav801.o
obj-$(CONFIG_SND_SOC_ADAV803) += snd-soc-adav803.o

80
sound/soc/codecs/adau7002.c Normal file
View File

@ -0,0 +1,80 @@
/*
* ADAU7002 Stereo PDM-to-I2S/TDM converter driver
*
* Copyright 2014-2016 Analog Devices
* Author: Lars-Peter Clausen <lars@metafoo.de>
*
* Licensed under the GPL-2.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
static const struct snd_soc_dapm_widget adau7002_widgets[] = {
SND_SOC_DAPM_INPUT("PDM_DAT"),
SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
};
static const struct snd_soc_dapm_route adau7002_routes[] = {
{ "Capture", NULL, "PDM_DAT" },
{ "Capture", NULL, "IOVDD" },
};
static struct snd_soc_dai_driver adau7002_dai = {
.name = "adau7002-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
.sig_bits = 20,
},
};
static const struct snd_soc_codec_driver adau7002_codec_driver = {
.dapm_widgets = adau7002_widgets,
.num_dapm_widgets = ARRAY_SIZE(adau7002_widgets),
.dapm_routes = adau7002_routes,
.num_dapm_routes = ARRAY_SIZE(adau7002_routes),
};
static int adau7002_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &adau7002_codec_driver,
&adau7002_dai, 1);
}
static int adau7002_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id adau7002_dt_ids[] = {
{ .compatible = "adi,adau7002", },
{ }
};
MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
#endif
static struct platform_driver adau7002_driver = {
.driver = {
.name = "adau7002",
.of_match_table = of_match_ptr(adau7002_dt_ids),
},
.probe = adau7002_probe,
.remove = adau7002_remove,
};
module_platform_driver(adau7002_driver);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
MODULE_LICENSE("GPL v2");