xref: /linux/sound/soc/codecs/ics43432.c (revision e8f88be5c1548791397dadf2250fb5dcc9461f10)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * I2S MEMS microphone driver for InvenSense ICS-43432 and similar
4  * MEMS-based microphones.
5  *
6  * - Non configurable.
7  * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
8  *
9  * Copyright (c) 2015 Axis Communications AB
10  */
11 
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/soc.h>
19 #include <sound/initval.h>
20 #include <sound/tlv.h>
21 
22 #define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
23 #define ICS43432_RATE_MAX 52800  /* Hz, from data sheet */
24 
25 #define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
26 
27 static struct snd_soc_dai_driver ics43432_dai = {
28 	.name = "ics43432-hifi",
29 	.capture = {
30 		.stream_name = "Capture",
31 		.channels_min = 1,
32 		.channels_max = 2,
33 		.rate_min = ICS43432_RATE_MIN,
34 		.rate_max = ICS43432_RATE_MAX,
35 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
36 		.formats = ICS43432_FORMATS,
37 	},
38 };
39 
40 static const struct snd_soc_component_driver ics43432_component_driver = {
41 	.idle_bias_on		= 1,
42 	.use_pmdown_time	= 1,
43 	.endianness		= 1,
44 };
45 
46 static int ics43432_probe(struct platform_device *pdev)
47 {
48 	return devm_snd_soc_register_component(&pdev->dev,
49 			&ics43432_component_driver,
50 			&ics43432_dai, 1);
51 }
52 
53 #ifdef CONFIG_OF
54 static const struct of_device_id ics43432_ids[] = {
55 	{ .compatible = "invensense,ics43432", },
56 	{ .compatible = "cui,cmm-4030d-261", },
57 	{ }
58 };
59 MODULE_DEVICE_TABLE(of, ics43432_ids);
60 #endif
61 
62 static struct platform_driver ics43432_driver = {
63 	.driver = {
64 		.name = "ics43432",
65 		.of_match_table = of_match_ptr(ics43432_ids),
66 	},
67 	.probe = ics43432_probe,
68 };
69 
70 module_platform_driver(ics43432_driver);
71 
72 MODULE_DESCRIPTION("ASoC ICS43432 driver");
73 MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
74 MODULE_LICENSE("GPL v2");
75