xref: /openbmc/linux/sound/soc/codecs/wm8727.c (revision 02004449)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * wm8727.c
4  *
5  *  Created on: 15-Oct-2009
6  *      Author: neil.jones@imgtec.com
7  *
8  * Copyright (C) 2009 Imagination Technologies Ltd.
9  */
10 
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/device.h>
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/initval.h>
19 #include <sound/soc.h>
20 
21 static const struct snd_soc_dapm_widget wm8727_dapm_widgets[] = {
22 SND_SOC_DAPM_OUTPUT("VOUTL"),
23 SND_SOC_DAPM_OUTPUT("VOUTR"),
24 };
25 
26 static const struct snd_soc_dapm_route wm8727_dapm_routes[] = {
27 	{ "VOUTL", NULL, "Playback" },
28 	{ "VOUTR", NULL, "Playback" },
29 };
30 
31 /*
32  * Note this is a simple chip with no configuration interface, sample rate is
33  * determined automatically by examining the Master clock and Bit clock ratios
34  */
35 #define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
36 			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
37 			SNDRV_PCM_RATE_192000)
38 
39 static struct snd_soc_dai_driver wm8727_dai = {
40 	.name = "wm8727-hifi",
41 	.playback = {
42 		.stream_name = "Playback",
43 		.channels_min = 2,
44 		.channels_max = 2,
45 		.rates = WM8727_RATES,
46 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
47 		},
48 };
49 
50 static const struct snd_soc_component_driver soc_component_dev_wm8727 = {
51 	.dapm_widgets		= wm8727_dapm_widgets,
52 	.num_dapm_widgets	= ARRAY_SIZE(wm8727_dapm_widgets),
53 	.dapm_routes		= wm8727_dapm_routes,
54 	.num_dapm_routes	= ARRAY_SIZE(wm8727_dapm_routes),
55 	.idle_bias_on		= 1,
56 	.use_pmdown_time	= 1,
57 	.endianness		= 1,
58 };
59 
wm8727_probe(struct platform_device * pdev)60 static int wm8727_probe(struct platform_device *pdev)
61 {
62 	return devm_snd_soc_register_component(&pdev->dev,
63 			&soc_component_dev_wm8727, &wm8727_dai, 1);
64 }
65 
66 static struct platform_driver wm8727_codec_driver = {
67 	.driver = {
68 			.name = "wm8727",
69 	},
70 
71 	.probe = wm8727_probe,
72 };
73 
74 module_platform_driver(wm8727_codec_driver);
75 
76 MODULE_DESCRIPTION("ASoC wm8727 driver");
77 MODULE_AUTHOR("Neil Jones");
78 MODULE_LICENSE("GPL");
79