76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* I2S MEMS microphone driver for InvenSense ICS-43432 and similar
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* MEMS-based microphones.
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*
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* - Non configurable.
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* - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
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*
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* Copyright (c) 2015 Axis Communications AB
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
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#define ICS43432_RATE_MAX 52800 /* Hz, from data sheet */
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#define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
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static struct snd_soc_dai_driver ics43432_dai = {
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.name = "ics43432-hifi",
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rate_min = ICS43432_RATE_MIN,
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.rate_max = ICS43432_RATE_MAX,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.formats = ICS43432_FORMATS,
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},
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};
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static const struct snd_soc_component_driver ics43432_component_driver = {
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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.non_legacy_dai_naming = 1,
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};
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static int ics43432_probe(struct platform_device *pdev)
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{
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return devm_snd_soc_register_component(&pdev->dev,
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&ics43432_component_driver,
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&ics43432_dai, 1);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id ics43432_ids[] = {
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{ .compatible = "invensense,ics43432", },
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{ .compatible = "cui,cmm-4030d-261", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, ics43432_ids);
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#endif
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static struct platform_driver ics43432_driver = {
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.driver = {
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.name = "ics43432",
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.of_match_table = of_match_ptr(ics43432_ids),
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},
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.probe = ics43432_probe,
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};
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module_platform_driver(ics43432_driver);
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MODULE_DESCRIPTION("ASoC ICS43432 driver");
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MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
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MODULE_LICENSE("GPL v2");
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