ASoC: ics43432: Add codec driver for InvenSense ICS-43432

Add support for the InvenSense ICS-43432 I2S MEMS microphone.

This is a non-software-configurable MEMS microphone with I2S output.

Tested on a setup with a single ICS-43432 (the device itself supports
stereo operation using a hardware pin controlling left vs. right channel
output).

Signed-off-by: Ricard Wanderlof <ricardw@axis.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ricard Wanderlof 2015-08-27 11:35:20 +02:00 committed by Mark Brown
parent bc0195aad0
commit 3b7ce99748
5 changed files with 101 additions and 0 deletions

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@ -0,0 +1,17 @@
Invensense ICS-43432 MEMS microphone with I2S output.
There are no software configuration options for this device, indeed, the only
host connection is the I2S interface. Apart from requirements on clock
frequency (460 kHz to 3.379 MHz according to the data sheet) there must be
64 clock cycles in each stereo output frame; 24 of the 32 available bits
contain audio data. A hardware pin determines if the device outputs data
on the left or right channel of the I2S frame.
Required properties:
- compatible : Must be "invensense,ics43432"
Example:
ics43432: ics43432 {
compatible = "invensense,ics43432";
};

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@ -110,6 +110,7 @@ ingenic Ingenic Semiconductor
innolux Innolux Corporation
intel Intel Corporation
intercontrol Inter Control Group
invensense InvenSense Inc.
isee ISEE 2007 S.L.
isil Intersil
karo Ka-Ro electronics GmbH

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@ -62,6 +62,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_BT_SCO
select SND_SOC_ES8328_SPI if SPI_MASTER
select SND_SOC_ES8328_I2C if I2C
select SND_SOC_ICS43432
select SND_SOC_ISABELLE if I2C
select SND_SOC_JZ4740_CODEC
select SND_SOC_LM4857 if I2C
@ -446,6 +447,9 @@ config SND_SOC_ES8328_SPI
tristate
select SND_SOC_ES8328
config SND_SOC_ICS43432
tristate
config SND_SOC_ISABELLE
tristate

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@ -55,6 +55,7 @@ snd-soc-dmic-objs := dmic.o
snd-soc-es8328-objs := es8328.o
snd-soc-es8328-i2c-objs := es8328-i2c.o
snd-soc-es8328-spi-objs := es8328-spi.o
snd-soc-ics43432-objs := ics43432.o
snd-soc-isabelle-objs := isabelle.o
snd-soc-jz4740-codec-objs := jz4740.o
snd-soc-l3-objs := l3.o
@ -242,6 +243,7 @@ obj-$(CONFIG_SND_SOC_DMIC) += snd-soc-dmic.o
obj-$(CONFIG_SND_SOC_ES8328) += snd-soc-es8328.o
obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
obj-$(CONFIG_SND_SOC_ICS43432) += snd-soc-ics43432.o
obj-$(CONFIG_SND_SOC_ISABELLE) += snd-soc-isabelle.o
obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o
obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o

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@ -0,0 +1,77 @@
/*
* I2S MEMS microphone driver for InvenSense ICS-43432
*
* - Non configurable.
* - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
*
* Copyright (c) 2015 Axis Communications AB
*
* Licensed under GPL2.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
#define ICS43432_RATE_MAX 52800 /* Hz, from data sheet */
#define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
static struct snd_soc_dai_driver ics43432_dai = {
.name = "ics43432-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rate_min = ICS43432_RATE_MIN,
.rate_max = ICS43432_RATE_MAX,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.formats = ICS43432_FORMATS,
},
};
static struct snd_soc_codec_driver ics43432_codec_driver = {
};
static int ics43432_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &ics43432_codec_driver,
&ics43432_dai, 1);
}
static int ics43432_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id ics43432_ids[] = {
{ .compatible = "invensense,ics43432", },
{ }
};
MODULE_DEVICE_TABLE(of, ics43432_dt_ids);
#endif
static struct platform_driver ics43432_driver = {
.driver = {
.name = "ics43432",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ics43432_ids),
},
.probe = ics43432_probe,
.remove = ics43432_remove,
};
module_platform_driver(ics43432_driver);
MODULE_DESCRIPTION("ASoC ICS43432 driver");
MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
MODULE_LICENSE("GPLv2");