1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ADAU7002 Stereo PDM-to-I2S/TDM converter driver 4 * 5 * Copyright 2014-2016 Analog Devices 6 * Author: Lars-Peter Clausen <lars@metafoo.de> 7 */ 8 9 #include <linux/acpi.h> 10 #include <linux/delay.h> 11 #include <linux/init.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/platform_device.h> 15 16 #include <sound/soc.h> 17 18 struct adau7002_priv { 19 int wakeup_delay; 20 }; 21 22 static int adau7002_aif_event(struct snd_soc_dapm_widget *w, 23 struct snd_kcontrol *kcontrol, int event) 24 { 25 struct snd_soc_component *component = 26 snd_soc_dapm_to_component(w->dapm); 27 struct adau7002_priv *adau7002 = 28 snd_soc_component_get_drvdata(component); 29 30 switch (event) { 31 case SND_SOC_DAPM_POST_PMU: 32 if (adau7002->wakeup_delay) 33 msleep(adau7002->wakeup_delay); 34 break; 35 } 36 37 return 0; 38 } 39 40 static int adau7002_component_probe(struct snd_soc_component *component) 41 { 42 struct adau7002_priv *adau7002; 43 44 adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002), 45 GFP_KERNEL); 46 if (!adau7002) 47 return -ENOMEM; 48 49 device_property_read_u32(component->dev, "wakeup-delay-ms", 50 &adau7002->wakeup_delay); 51 52 snd_soc_component_set_drvdata(component, adau7002); 53 54 return 0; 55 } 56 57 static const struct snd_soc_dapm_widget adau7002_widgets[] = { 58 SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0, 59 SND_SOC_NOPM, 0, 0, adau7002_aif_event, 60 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), 61 SND_SOC_DAPM_INPUT("PDM_DAT"), 62 SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0), 63 }; 64 65 static const struct snd_soc_dapm_route adau7002_routes[] = { 66 { "ADAU AIF", NULL, "PDM_DAT"}, 67 { "Capture", NULL, "PDM_DAT" }, 68 { "Capture", NULL, "IOVDD" }, 69 }; 70 71 static struct snd_soc_dai_driver adau7002_dai = { 72 .name = "adau7002-hifi", 73 .capture = { 74 .stream_name = "Capture", 75 .channels_min = 2, 76 .channels_max = 2, 77 .rates = SNDRV_PCM_RATE_8000_96000, 78 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE | 79 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE | 80 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE, 81 .sig_bits = 20, 82 }, 83 }; 84 85 static const struct snd_soc_component_driver adau7002_component_driver = { 86 .probe = adau7002_component_probe, 87 .dapm_widgets = adau7002_widgets, 88 .num_dapm_widgets = ARRAY_SIZE(adau7002_widgets), 89 .dapm_routes = adau7002_routes, 90 .num_dapm_routes = ARRAY_SIZE(adau7002_routes), 91 .idle_bias_on = 1, 92 .use_pmdown_time = 1, 93 .endianness = 1, 94 }; 95 96 static int adau7002_probe(struct platform_device *pdev) 97 { 98 return devm_snd_soc_register_component(&pdev->dev, 99 &adau7002_component_driver, 100 &adau7002_dai, 1); 101 } 102 103 #ifdef CONFIG_OF 104 static const struct of_device_id adau7002_dt_ids[] = { 105 { .compatible = "adi,adau7002", }, 106 { } 107 }; 108 MODULE_DEVICE_TABLE(of, adau7002_dt_ids); 109 #endif 110 111 #ifdef CONFIG_ACPI 112 static const struct acpi_device_id adau7002_acpi_match[] = { 113 { "ADAU7002", 0 }, 114 {}, 115 }; 116 MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match); 117 #endif 118 119 static struct platform_driver adau7002_driver = { 120 .driver = { 121 .name = "adau7002", 122 .of_match_table = of_match_ptr(adau7002_dt_ids), 123 .acpi_match_table = ACPI_PTR(adau7002_acpi_match), 124 }, 125 .probe = adau7002_probe, 126 }; 127 module_platform_driver(adau7002_driver); 128 129 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 130 MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver"); 131 MODULE_LICENSE("GPL v2"); 132