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@xxxxxxxxxx>
---
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@xxxxxxxxxx>
+ *
+ * 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@xxxxxxxxxx>");
+MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
+MODULE_LICENSE("GPL v2");
--
2.1.4
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