1 files changed, 137 insertions, 0 deletions
diff --git a/sound/soc/codecs/adau7002.c b/sound/soc/codecs/adau7002.c
new file mode 100644
index 000000000..401bafabc
--- /dev/null
+++ b/sound/soc/codecs/adau7002.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADAU7002 Stereo PDM-to-I2S/TDM converter driver
+ *
+ * Copyright 2014-2016 Analog Devices
+ *  Author: Lars-Peter Clausen <lars@metafoo.de>
+ */
+
+#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,
+};
+
+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 <lars@metafoo.de>");
+MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
+MODULE_LICENSE("GPL v2");