soc/codecs/wm8782.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * sound/soc/codecs/wm8782.c
0004  * simple, strap-pin configured 24bit 2ch ADC
0005  *
0006  * Copyright: 2011 Raumfeld GmbH
0007  * Author: Johannes Stezenbach <js@sig21.net>
0008  *
0009  * based on ad73311.c
0010  * Copyright:   Analog Devices Inc.
0011  * Author:  Cliff Cai <cliff.cai@analog.com>
0012  */
0013
0014 #include <linux/init.h>
0015 #include <linux/slab.h>
0016 #include <linux/module.h>
0017 #include <linux/kernel.h>
0018 #include <linux/device.h>
0019 #include <linux/regulator/consumer.h>
0020 #include <sound/core.h>
0021 #include <sound/pcm.h>
0022 #include <sound/ac97_codec.h>
0023 #include <sound/initval.h>
0024 #include <sound/soc.h>
0025
0026 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
0027 SND_SOC_DAPM_INPUT("AINL"),
0028 SND_SOC_DAPM_INPUT("AINR"),
0029 };
0030
0031 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
0032     { "Capture", NULL, "AINL" },
0033     { "Capture", NULL, "AINR" },
0034 };
0035
0036 static struct snd_soc_dai_driver wm8782_dai = {
0037     .name = "wm8782",
0038     .capture = {
0039         .stream_name = "Capture",
0040         .channels_min = 2,
0041         .channels_max = 2,
0042         /* For configurations with FSAMPEN=0 */
0043         .rates = SNDRV_PCM_RATE_8000_48000,
0044         .formats = SNDRV_PCM_FMTBIT_S16_LE |
0045                SNDRV_PCM_FMTBIT_S20_3LE |
0046                SNDRV_PCM_FMTBIT_S24_LE,
0047     },
0048 };
0049
0050 /* regulator power supply names */
0051 static const char *supply_names[] = {
0052     "Vdda", /* analog supply, 2.7V - 3.6V */
0053     "Vdd",  /* digital supply, 2.7V - 5.5V */
0054 };
0055
0056 struct wm8782_priv {
0057     struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
0058 };
0059
0060 static int wm8782_soc_probe(struct snd_soc_component *component)
0061 {
0062     struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
0063     return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
0064 }
0065
0066 static void wm8782_soc_remove(struct snd_soc_component *component)
0067 {
0068     struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
0069     regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
0070 }
0071
0072 #ifdef CONFIG_PM
0073 static int wm8782_soc_suspend(struct snd_soc_component *component)
0074 {
0075     struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
0076     regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
0077     return 0;
0078 }
0079
0080 static int wm8782_soc_resume(struct snd_soc_component *component)
0081 {
0082     struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
0083     return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
0084 }
0085 #else
0086 #define wm8782_soc_suspend      NULL
0087 #define wm8782_soc_resume       NULL
0088 #endif /* CONFIG_PM */
0089
0090 static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
0091     .probe          = wm8782_soc_probe,
0092     .remove         = wm8782_soc_remove,
0093     .suspend        = wm8782_soc_suspend,
0094     .resume         = wm8782_soc_resume,
0095     .dapm_widgets       = wm8782_dapm_widgets,
0096     .num_dapm_widgets   = ARRAY_SIZE(wm8782_dapm_widgets),
0097     .dapm_routes        = wm8782_dapm_routes,
0098     .num_dapm_routes    = ARRAY_SIZE(wm8782_dapm_routes),
0099     .idle_bias_on       = 1,
0100     .use_pmdown_time    = 1,
0101     .endianness     = 1,
0102 };
0103
0104 static int wm8782_probe(struct platform_device *pdev)
0105 {
0106     struct device *dev = &pdev->dev;
0107     struct wm8782_priv *priv;
0108     int ret, i;
0109
0110     priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
0111     if (!priv)
0112         return -ENOMEM;
0113
0114     dev_set_drvdata(dev, priv);
0115
0116     for (i = 0; i < ARRAY_SIZE(supply_names); i++)
0117         priv->supplies[i].supply = supply_names[i];
0118
0119     ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
0120                       priv->supplies);
0121     if (ret < 0)
0122         return ret;
0123
0124     return devm_snd_soc_register_component(&pdev->dev,
0125             &soc_component_dev_wm8782, &wm8782_dai, 1);
0126 }
0127
0128 #ifdef CONFIG_OF
0129 static const struct of_device_id wm8782_of_match[] = {
0130     { .compatible = "wlf,wm8782", },
0131     { }
0132 };
0133 MODULE_DEVICE_TABLE(of, wm8782_of_match);
0134 #endif
0135
0136 static struct platform_driver wm8782_codec_driver = {
0137     .driver = {
0138         .name = "wm8782",
0139         .of_match_table = of_match_ptr(wm8782_of_match),
0140     },
0141     .probe = wm8782_probe,
0142 };
0143
0144 module_platform_driver(wm8782_codec_driver);
0145
0146 MODULE_DESCRIPTION("ASoC WM8782 driver");
0147 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
0148 MODULE_LICENSE("GPL");