ASoC: ics43432: Add codec driver for InvenSense ICS-43432

Add support for the InvenSense ICS-43432 I2S MEMS microphone.

This is a non-software-configurable MEMS microphone with I2S output.

Tested on a setup with a single ICS-43432 (the device itself supports
stereo operation using a hardware pin controlling left vs. right channel
output).

Signed-off-by: Ricard Wanderlof <ricardw@axis.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/ics43432.txt b/Documentation/devicetree/bindings/sound/ics43432.txt
new file mode 100644 (file)
index 0000000..b02e3a6
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+++ b/Documentation/devicetree/bindings/sound/ics43432.txt
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+Invensense ICS-43432 MEMS microphone with I2S output.
+
+There are no software configuration options for this device, indeed, the only
+host connection is the I2S interface. Apart from requirements on clock
+frequency (460 kHz to 3.379 MHz according to the data sheet) there must be
+64 clock cycles in each stereo output frame; 24 of the 32 available bits
+contain audio data. A hardware pin determines if the device outputs data
+on the left or right channel of the I2S frame.
+
+Required properties:
+  - compatible : Must be "invensense,ics43432"
+
+Example:
+
+       ics43432: ics43432 {
+               compatible = "invensense,ics43432";
+       };

diff --cc Documentation/devicetree/bindings/vendor-prefixes.txt
Simple merge

diff --cc sound/soc/codecs/Kconfig
Simple merge

diff --cc sound/soc/codecs/Makefile
Simple merge

diff --cc sound/soc/codecs/ics43432.c
Simple merge