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diff --git a/Documentation/devicetree/bindings/sound/nau8315.txt b/Documentation/devicetree/bindings/sound/nau8315.txt
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+Nuvoton NAU8315 Mono Class-D Amplifier
+
+Required properties:
+- compatible   : "nuvoton,nau8315"
+
+Optional properties:
+- enable-gpios : GPIO specifier for the chip's device enable input(EN) pin.
+        If this option is not specified then driver does not manage
+        the pin state (e.g. chip is always on).
+
+Example:
+
+#include <dt-bindings/gpio/gpio.h>
+
+nau8315 {
+	compatible = "nuvoton,nau8315";
+	enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
+};