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adau7002.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* ADAU7002 Stereo PDM-to-I2S/TDM converter driver
*
* Copyright 2014-2016 Analog Devices
* Author: Lars-Peter Clausen <[email protected]>
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
struct adau7002_priv {
int wakeup_delay;
};
static int adau7002_aif_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
struct adau7002_priv *adau7002 =
snd_soc_component_get_drvdata(component);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
if (adau7002->wakeup_delay)
msleep(adau7002->wakeup_delay);
break;
}
return 0;
}
static int adau7002_component_probe(struct snd_soc_component *component)
{
struct adau7002_priv *adau7002;
adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
GFP_KERNEL);
if (!adau7002)
return -ENOMEM;
device_property_read_u32(component->dev, "wakeup-delay-ms",
&adau7002->wakeup_delay);
snd_soc_component_set_drvdata(component, adau7002);
return 0;
}
static const struct snd_soc_dapm_widget adau7002_widgets[] = {
SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0,
SND_SOC_NOPM, 0, 0, adau7002_aif_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_INPUT("PDM_DAT"),
SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
};
static const struct snd_soc_dapm_route adau7002_routes[] = {
{ "ADAU AIF", NULL, "PDM_DAT"},
{ "Capture", NULL, "PDM_DAT" },
{ "Capture", NULL, "IOVDD" },
};
static struct snd_soc_dai_driver adau7002_dai = {
.name = "adau7002-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
.sig_bits = 20,
},
};
static const struct snd_soc_component_driver adau7002_component_driver = {
.probe = adau7002_component_probe,
.dapm_widgets = adau7002_widgets,
.num_dapm_widgets = ARRAY_SIZE(adau7002_widgets),
.dapm_routes = adau7002_routes,
.num_dapm_routes = ARRAY_SIZE(adau7002_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static int adau7002_probe(struct platform_device *pdev)
{
return devm_snd_soc_register_component(&pdev->dev,
&adau7002_component_driver,
&adau7002_dai, 1);
}
static int adau7002_remove(struct platform_device *pdev)
{
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id adau7002_dt_ids[] = {
{ .compatible = "adi,adau7002", },
{ }
};
MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id adau7002_acpi_match[] = {
{ "ADAU7002", 0 },
{},
};
MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
#endif
static struct platform_driver adau7002_driver = {
.driver = {
.name = "adau7002",
.of_match_table = of_match_ptr(adau7002_dt_ids),
.acpi_match_table = ACPI_PTR(adau7002_acpi_match),
},
.probe = adau7002_probe,
.remove = adau7002_remove,
};
module_platform_driver(adau7002_driver);
MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
MODULE_LICENSE("GPL v2");