ASoC: Add ADAU1381/ADAU1781 audio CODEC support

This patch adds support for the Analog Devices ADAU1381 and ADAU1781 audio
CODECs. The device is a low-power, 24-bit stereo audio CODEC with multiple
analog inputs and outputs, two digital microphone inputs and an I2S interface.
The device can be controlled either using I2C or SPI. The main difference
between the two variants is that the ADAU1781 has a freely programmable SigmaDSP
processor, while the ADAU1381 has a fixed function wind noise reduction filter.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/sound/soc/codecs/adau1781-i2c.c b/sound/soc/codecs/adau1781-i2c.c
new file mode 100644
index 000000000000..2ce4362ccec1
--- /dev/null
+++ b/sound/soc/codecs/adau1781-i2c.c
@@ -0,0 +1,58 @@
+/*
+ * Driver for ADAU1381/ADAU1781 CODEC
+ *
+ * Copyright 2014 Analog Devices Inc.
+ *  Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+
+#include "adau1781.h"
+
+static int adau1781_i2c_probe(struct i2c_client *client,
+	const struct i2c_device_id *id)
+{
+	struct regmap_config config;
+
+	config = adau1781_regmap_config;
+	config.val_bits = 8;
+	config.reg_bits = 16;
+
+	return adau1781_probe(&client->dev,
+		devm_regmap_init_i2c(client, &config),
+		id->driver_data, NULL);
+}
+
+static int adau1781_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	return 0;
+}
+
+static const struct i2c_device_id adau1781_i2c_ids[] = {
+	{ "adau1381", ADAU1381 },
+	{ "adau1781", ADAU1781 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adau1781_i2c_ids);
+
+static struct i2c_driver adau1781_i2c_driver = {
+	.driver = {
+		.name = "adau1781",
+		.owner = THIS_MODULE,
+	},
+	.probe = adau1781_i2c_probe,
+	.remove = adau1781_i2c_remove,
+	.id_table = adau1781_i2c_ids,
+};
+module_i2c_driver(adau1781_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC I2C driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");