1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * I2S MEMS microphone driver for InvenSense ICS-43432
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * - Non configurable.
6*4882a593Smuzhiyun * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (c) 2015 Axis Communications AB
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/slab.h>
14*4882a593Smuzhiyun #include <sound/core.h>
15*4882a593Smuzhiyun #include <sound/pcm.h>
16*4882a593Smuzhiyun #include <sound/pcm_params.h>
17*4882a593Smuzhiyun #include <sound/soc.h>
18*4882a593Smuzhiyun #include <sound/initval.h>
19*4882a593Smuzhiyun #include <sound/tlv.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
22*4882a593Smuzhiyun #define ICS43432_RATE_MAX 52800 /* Hz, from data sheet */
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static struct snd_soc_dai_driver ics43432_dai = {
27*4882a593Smuzhiyun .name = "ics43432-hifi",
28*4882a593Smuzhiyun .capture = {
29*4882a593Smuzhiyun .stream_name = "Capture",
30*4882a593Smuzhiyun .channels_min = 1,
31*4882a593Smuzhiyun .channels_max = 2,
32*4882a593Smuzhiyun .rate_min = ICS43432_RATE_MIN,
33*4882a593Smuzhiyun .rate_max = ICS43432_RATE_MAX,
34*4882a593Smuzhiyun .rates = SNDRV_PCM_RATE_CONTINUOUS,
35*4882a593Smuzhiyun .formats = ICS43432_FORMATS,
36*4882a593Smuzhiyun },
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun static const struct snd_soc_component_driver ics43432_component_driver = {
40*4882a593Smuzhiyun .idle_bias_on = 1,
41*4882a593Smuzhiyun .use_pmdown_time = 1,
42*4882a593Smuzhiyun .endianness = 1,
43*4882a593Smuzhiyun .non_legacy_dai_naming = 1,
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun
ics43432_probe(struct platform_device * pdev)46*4882a593Smuzhiyun static int ics43432_probe(struct platform_device *pdev)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun return devm_snd_soc_register_component(&pdev->dev,
49*4882a593Smuzhiyun &ics43432_component_driver,
50*4882a593Smuzhiyun &ics43432_dai, 1);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun #ifdef CONFIG_OF
54*4882a593Smuzhiyun static const struct of_device_id ics43432_ids[] = {
55*4882a593Smuzhiyun { .compatible = "invensense,ics43432", },
56*4882a593Smuzhiyun { }
57*4882a593Smuzhiyun };
58*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, ics43432_ids);
59*4882a593Smuzhiyun #endif
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun static struct platform_driver ics43432_driver = {
62*4882a593Smuzhiyun .driver = {
63*4882a593Smuzhiyun .name = "ics43432",
64*4882a593Smuzhiyun .of_match_table = of_match_ptr(ics43432_ids),
65*4882a593Smuzhiyun },
66*4882a593Smuzhiyun .probe = ics43432_probe,
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun module_platform_driver(ics43432_driver);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun MODULE_DESCRIPTION("ASoC ICS43432 driver");
72*4882a593Smuzhiyun MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
73*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
74