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

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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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77
sound/soc/codecs/ics43432.c Normal file
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/*
* 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");