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diff --git a/Documentation/devicetree/bindings/sound/ak5558.txt b/Documentation/devicetree/bindings/sound/ak5558.txt
deleted file mode 100644
index 7d67ca6ced80..000000000000
--- a/Documentation/devicetree/bindings/sound/ak5558.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-AK5558 8 channel differential 32-bit delta-sigma ADC
-
-This device supports I2C mode only.
-
-Required properties:
-
-- compatible : "asahi-kasei,ak5558"
-- reg : The I2C address of the device.
-
-Optional properties:
-
-- reset-gpios: A GPIO specifier for the power down & reset pin.
-
-Example:
-
-&i2c {
-	ak5558: adc@10 {
-		compatible = "asahi-kasei,ak5558";
-		reg = <0x10>;
-		reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
-	};
-};