ASoC: Add ADAU1373 codec support

This patch adds support for the Analog Devices ADAU1373 audio codec.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/adau1373.h

@@ -0,0 +1,34 @@
+/*
+ * Analog Devices ADAU1373 Audio Codec drive
+ *
+ * Copyright 2011 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __SOUND_ADAU1373_H__
+#define __SOUND_ADAU1373_H__
+
+enum adau1373_micbias_voltage {
+	ADAU1373_MICBIAS_2_9V = 0,
+	ADAU1373_MICBIAS_2_2V = 1,
+	ADAU1373_MICBIAS_2_6V = 2,
+	ADAU1373_MICBIAS_1_8V = 3,
+};
+
+#define ADAU1373_DRC_SIZE 13
+
+struct adau1373_platform_data {
+	bool input_differential[4];
+	bool lineout_differential;
+	bool lineout_ground_sense;
+
+	unsigned int num_drc;
+	uint8_t drc_setting[3][ADAU1373_DRC_SIZE];
+
+	enum adau1373_micbias_voltage micbias1;
+	enum adau1373_micbias_voltage micbias2;
+};
+
+#endif