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 Device 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
  26 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
  27 SND_SOC_DAPM_INPUT("AINL"),
  28 SND_SOC_DAPM_INPUT("AINR"),
  29 };
  30
  31 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
  32         { "Capture", NULL, "AINL" },
  33         { "Capture", NULL, "AINR" },
  34 };
  35
  36 static 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 */
  51 static const char *supply_names[] = {
  52         "Vdda", /* analog supply, 2.7V - 3.6V */
  53         "Vdd",  /* digital supply, 2.7V - 5.5V */
  54 };
  55
  56 struct wm8782_priv {
  57         struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
  58 };
  59
  60 static 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
  66 static 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
  73 static 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
  80 static 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
  90 static 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
 105 static 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
 130 static const struct of_device_id wm8782_of_match[] = {
 131         { .compatible = "wlf,wm8782", },
 132         { }
 133 };
 134 MODULE_DEVICE_TABLE(of, wm8782_of_match);
 135 #endif
 136
 137 static 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
 145 module_platform_driver(wm8782_codec_driver);
 146
 147 MODULE_DESCRIPTION("ASoC WM8782 driver");
 148 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
 149 MODULE_LICENSE("GPL");