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 --- sound/soc/codecs/Kconfig | 4 +++ sound/soc/codecs/Makefile | 2 ++ sound/soc/codecs/adau7002.c | 80 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 86 insertions(+) create mode 100644 sound/soc/codecs/adau7002.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index a0a4164..2b4dde1 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -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 @@ -324,6 +325,9 @@ 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

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 80b4f51..550a174 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -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 @@ -234,6 +235,7 @@ 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 diff --git a/sound/soc/codecs/adau7002.c b/sound/soc/codecs/adau7002.c new file mode 100644 index 0000000..9df72c6 --- /dev/null +++ b/sound/soc/codecs/adau7002.c @@ -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");