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, 19 insertions, 0 deletions

diff --git a/include/linux/platform_data/adau17x1.h b/include/linux/platform_data/adau17x1.h
index d234d9e46fd6..a81766cae230 100644
--- a/include/linux/platform_data/adau17x1.h
+++ b/include/linux/platform_data/adau17x1.h
@@ -87,4 +87,23 @@ struct adau1761_platform_data {
         enum adau17x1_micbias_voltage micbias_voltage;
 };
 
+/**
+ * struct adau1781_platform_data - ADAU1781 Codec driver platform data
+ * @left_input_differential: If true configure the left input as
+ * differential input.
+ * @right_input_differential: If true configure the right input as differntial
+ *  input.
+ * @use_dmic: If true configure the MIC pins as digital microphone pins instead
+ *  of analog microphone pins.
+ * @micbias_voltage: Microphone voltage bias
+ */
+struct adau1781_platform_data {
+        bool left_input_differential;
+        bool right_input_differential;
+
+        bool use_dmic;
+
+        enum adau17x1_micbias_voltage micbias_voltage;
+};
+
 #endif