[PATCH 1/2] ASoC: cx2092x: Add DT bingings doc for CX2092X DSP

[simon.ho.cnxt@gmail.com]

From: Simon Ho <simon.ho@conexant.com>

Initial version of CX2092X device tree bindings document.

Signed-off-by: Simon Ho <simon.ho@conexant.com>
---
 .../devicetree/bindings/sound/cx2092x.txt          | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cx2092x.txt

diff --git a/Documentation/devicetree/bindings/sound/cx2092x.txt b/Documentation/devicetree/bindings/sound/cx2092x.txt
new file mode 100644
index 0000000..cb61cfc
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cx2092x.txt
@@ -0,0 +1,30 @@
+Conexant CX20921/CX209724 Voice Processor SoC
+
+The devices supports both the I2C and SPI bus.
+
+Required properties:
+
+  - compatible : One of "cnxt,cx20921", "cnxt,cx20924".
+  - reg : the I2C address of the device for I2C, it should be <0x41>
+
+Optional properties:
+
+  - reset-gpio:  A GPIO spec to define which pin is connected to the chip's
+                 !RESET pin. If specified, the driver will assert a hardware
+                 reset at probe time.
+
+CODEC input pins:
+  "MIC"       - Microphone input
+
+
+Example:
+
+codec_i2c: cx20921@41 {
+        compatible = "cnxt,cx20921";
+        reg = <0x41>;
+        reset-gpio = <&gpio 23 0>;
+};
+
+codec_spi: cx20924@0 {
+        compatible = "cnxt,cx20924";
+};
-- 
2.7.4