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 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 }; 103 104 static int wm8782_probe(struct platform_device *pdev) 105 { 106 struct device *dev = &pdev->dev; 107 struct wm8782_priv *priv; 108 int ret, i; 109 110 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 111 if (!priv) 112 return -ENOMEM; 113 114 dev_set_drvdata(dev, priv); 115 116 for (i = 0; i < ARRAY_SIZE(supply_names); i++) 117 priv->supplies[i].supply = supply_names[i]; 118 119 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), 120 priv->supplies); 121 if (ret < 0) 122 return ret; 123 124 return devm_snd_soc_register_component(&pdev->dev, 125 &soc_component_dev_wm8782, &wm8782_dai, 1); 126 } 127 128 #ifdef CONFIG_OF 129 static const struct of_device_id wm8782_of_match[] = { 130 { .compatible = "wlf,wm8782", }, 131 { } 132 }; 133 MODULE_DEVICE_TABLE(of, wm8782_of_match); 134 #endif 135 136 static struct platform_driver wm8782_codec_driver = { 137 .driver = { 138 .name = "wm8782", 139 .of_match_table = of_match_ptr(wm8782_of_match), 140 }, 141 .probe = wm8782_probe, 142 }; 143 144 module_platform_driver(wm8782_codec_driver); 145 146 MODULE_DESCRIPTION("ASoC WM8782 driver"); 147 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>"); 148 MODULE_LICENSE("GPL"); 149