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diff --git a/Documentation/devicetree/bindings/sound/spdif-transmitter.txt b/Documentation/devicetree/bindings/sound/spdif-transmitter.txt
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+++ b/Documentation/devicetree/bindings/sound/spdif-transmitter.txt
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+Device-Tree bindings for dummy spdif transmitter
+
+Required properties:
+	- compatible: should be "linux,spdif-dit".
+
+Example node:
+
+	codec: spdif-transmitter {
+		compatible = "linux,spdif-dit";
+	};