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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * ADAU7002 Stereo PDM-to-I2S/TDM converter driver4 *5 * Copyright 2014-2016 Analog Devices6 * 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 18struct adau7002_priv {19 int wakeup_delay;20};21 22static 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 40static 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 57static 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 65static 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 71static 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 85static 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 96static 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_OF104static const struct of_device_id adau7002_dt_ids[] = {105 { .compatible = "adi,adau7002", },106 { }107};108MODULE_DEVICE_TABLE(of, adau7002_dt_ids);109#endif110 111#ifdef CONFIG_ACPI112static const struct acpi_device_id adau7002_acpi_match[] = {113 { "ADAU7002", 0 },114 {},115};116MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);117#endif118 119static 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};127module_platform_driver(adau7002_driver);128 129MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");130MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");131MODULE_LICENSE("GPL v2");132