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diff --git a/Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt b/Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt
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+Bindings for I2S controller built into xtfpga Xtensa bitstreams.
+
+Required properties:
+- compatible: shall be "cdns,xtfpga-i2s".
+- reg: memory region (address and length) with device registers.
+- interrupts: interrupt for the device.
+- clocks: phandle to the clk used as master clock. I2S bus clock
+  is derived from it.
+
+Examples:
+
+        i2s0: xtfpga-i2s@0d080000 {
+                #sound-dai-cells = <0>;
+                compatible = "cdns,xtfpga-i2s";
+                reg = <0x0d080000 0x40>;
+                interrupts = <2 1>;
+                clocks = <&cdce706 4>;
+        };