LXR linux/sound/soc/codecs/wm8782.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * sound/soc/codecs/wm8782.c
   4 * simple, strap-pin configured 24bit 2ch ADC
   5 *
   6 * Copyright: 2011 Raumfeld GmbH
   7 * Author: Johannes Stezenbach <js@sig21.net>
   8 *
   9 * based on ad73311.c
  10 * Copyright:   Analog Devices Inc.
  11 * Author:      Cliff Cai <cliff.cai@analog.com>
  12 */
  13
  14#include <linux/init.h>
  15#include <linux/slab.h>
  16#include <linux/module.h>
  17#include <linux/kernel.h>
  18#include <linux/device.h>
  19#include <linux/regulator/consumer.h>
  20#include <sound/core.h>
  21#include <sound/pcm.h>
  22#include <sound/ac97_codec.h>
  23#include <sound/initval.h>
  24#include <sound/soc.h>
  25
  26static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
  27SND_SOC_DAPM_INPUT("AINL"),
  28SND_SOC_DAPM_INPUT("AINR"),
  29};
  30
  31static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
  32        { "Capture", NULL, "AINL" },
  33        { "Capture", NULL, "AINR" },
  34};
  35
  36static struct snd_soc_dai_driver wm8782_dai = {
  37        .name = "wm8782",
  38        .capture = {
  39                .stream_name = "Capture",
  40                .channels_min = 2,
  41                .channels_max = 2,
  42                /* For configurations with FSAMPEN=0 */
  43                .rates = SNDRV_PCM_RATE_8000_48000,
  44                .formats = SNDRV_PCM_FMTBIT_S16_LE |
  45                           SNDRV_PCM_FMTBIT_S20_3LE |
  46                           SNDRV_PCM_FMTBIT_S24_LE,
  47        },
  48};
  49
  50/* regulator power supply names */
  51static const char *supply_names[] = {
  52        "Vdda", /* analog supply, 2.7V - 3.6V */
  53        "Vdd",  /* digital supply, 2.7V - 5.5V */
  54};
  55
  56struct wm8782_priv {
  57        struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
  58};
  59
  60static int wm8782_soc_probe(struct snd_soc_component *component)
  61{
  62        struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  63        return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
  64}
  65
  66static void wm8782_soc_remove(struct snd_soc_component *component)
  67{
  68        struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  69        regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
  70}
  71
  72#ifdef CONFIG_PM
  73static int wm8782_soc_suspend(struct snd_soc_component *component)
  74{
  75        struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  76        regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
  77        return 0;
  78}
  79
  80static int wm8782_soc_resume(struct snd_soc_component *component)
  81{
  82        struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  83        return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
  84}
  85#else
  86#define wm8782_soc_suspend      NULL
  87#define wm8782_soc_resume       NULL
  88#endif /* CONFIG_PM */
  89
  90static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
  91        .probe                  = wm8782_soc_probe,
  92        .remove                 = wm8782_soc_remove,
  93        .suspend                = wm8782_soc_suspend,
  94        .resume                 = wm8782_soc_resume,
  95        .dapm_widgets           = wm8782_dapm_widgets,
  96        .num_dapm_widgets       = ARRAY_SIZE(wm8782_dapm_widgets),
  97        .dapm_routes            = wm8782_dapm_routes,
  98        .num_dapm_routes        = ARRAY_SIZE(wm8782_dapm_routes),
  99        .idle_bias_on           = 1,
 100        .use_pmdown_time        = 1,
 101        .endianness             = 1,
 102        .non_legacy_dai_naming  = 1,
 103};
 104
 105static int wm8782_probe(struct platform_device *pdev)
 106{
 107        struct device *dev = &pdev->dev;
 108        struct wm8782_priv *priv;
 109        int ret, i;
 110
 111        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 112        if (!priv)
 113                return -ENOMEM;
 114
 115        dev_set_drvdata(dev, priv);
 116
 117        for (i = 0; i < ARRAY_SIZE(supply_names); i++)
 118                priv->supplies[i].supply = supply_names[i];
 119
 120        ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
 121                                      priv->supplies);
 122        if (ret < 0)
 123                return ret;
 124
 125        return devm_snd_soc_register_component(&pdev->dev,
 126                        &soc_component_dev_wm8782, &wm8782_dai, 1);
 127}
 128
 129#ifdef CONFIG_OF
 130static const struct of_device_id wm8782_of_match[] = {
 131        { .compatible = "wlf,wm8782", },
 132        { }
 133};
 134MODULE_DEVICE_TABLE(of, wm8782_of_match);
 135#endif
 136
 137static struct platform_driver wm8782_codec_driver = {
 138        .driver = {
 139                .name = "wm8782",
 140                .of_match_table = of_match_ptr(wm8782_of_match),
 141        },
 142        .probe = wm8782_probe,
 143};
 144
 145module_platform_driver(wm8782_codec_driver);
 146
 147MODULE_DESCRIPTION("ASoC WM8782 driver");
 148MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
 149MODULE_LICENSE("GPL");
 150