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diff --git a/Documentation/devicetree/bindings/sound/alc5623.txt b/Documentation/devicetree/bindings/sound/alc5623.txt
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+ALC5621/ALC5622/ALC5623 audio Codec
+
+Required properties:
+
+ - compatible:  "realtek,alc5623"
+ - reg:         the I2C address of the device.
+
+Optional properties:
+
+ - add-ctrl:      Default register value for Reg-40h, Additional Control
+                  Register. If absent or has the value of 0, the
+                  register is untouched.
+
+ - jack-det-ctrl: Default register value for Reg-5Ah, Jack Detect
+                  Control Register. If absent or has value 0, the
+                  register is untouched.
+
+Example:
+
+        alc5621: alc5621@1a {
+                compatible = "alc5621";
+                reg = <0x1a>;
+                add-ctrl = <0x3700>;
+                jack-det-ctrl = <0x4810>;
+        };