From a1cf13479084b988fa9ef536b8256d9908fc6e30 Mon Sep 17 00:00:00 2001
From: Simon Ho <simon.ho@conexant.com>
Date: Wed, 5 Apr 2017 17:07:13 +0800
Subject: [PATCH] ASoC: cx2072x: Add DT bingings documentation for CX2072X
 CODEC
References: bsc#1068546
Patch-mainline: Submitted, alsa-devel ML

Initial version of CX2072X device tree bindings document.

Signed-off-by: Simon Ho <simon.ho@conexant.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 Documentation/devicetree/bindings/sound/cx2072x.txt |   36 ++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cx2072x.txt

--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cx2072x.txt
@@ -0,0 +1,36 @@
+Conexant CX20721/CX20723/CX7601 audio CODEC
+
+The devices support I2C only.
+
+Required properties:
+
+  - compatible : One of "cnxt,cx20721", "cnxt,cx20723", "cnxt,cx7601".
+
+  - reg : the I2C address of the device for I2C, it should be <0x33>
+
+Optional properties:
+
+  - clocks : phandle and clock specifier for codec MCLK.
+  - clock-names : Clock name string for 'clocks' attribute, should be "mclk".
+
+CODEC output pins:
+  "PORTA"	- Headphone
+  "PORTG"	- Class-D output
+  "PORTE"	- Line out
+
+CODEC output pins for Conexant DSP chip:
+  "AEC REF"	- AEC reference signal
+
+CODEC input pins:
+  "PORTB"	- Analog mic
+  "PORTC"	- Digital mic
+  "PORTD"	- Headset mic
+
+Example:
+
+codec: cx20721@33 {
+	compatible = "cnxt,cx20721";
+	reg = <0x33>;
+	clocks = <&sco>;
+	clock-names = "mclk";
+};