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diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
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+Allwinner sun4i USB PHY
+-----------------------
+
+Required properties:
+- compatible : should be one of "allwinner,sun4i-a10-usb-phy",
+  "allwinner,sun5i-a13-usb-phy" or "allwinner,sun7i-a20-usb-phy"
+- reg : a list of offset + length pairs
+- reg-names : "phy_ctrl", "pmu1" and for sun4i or sun7i "pmu2"
+- #phy-cells : from the generic phy bindings, must be 1
+- clocks : phandle + clock specifier for the phy clock
+- clock-names : "usb_phy"
+- resets : a list of phandle + reset specifier pairs
+- reset-names : "usb0_reset", "usb1_reset" and for sun4i or sun7i "usb2_reset"
+
+Example:
+        usbphy: phy@0x01c13400 {
+                #phy-cells = <1>;
+                compatible = "allwinner,sun4i-a10-usb-phy";
+                /* phy base regs, phy1 pmu reg, phy2 pmu reg */
+                reg = <0x01c13400 0x10 0x01c14800 0x4 0x01c1c800 0x4>;
+                reg-names = "phy_ctrl", "pmu1", "pmu2";
+                clocks = <&usb_clk 8>;
+                clock-names = "usb_phy";
+                resets = <&usb_clk 1>, <&usb_clk 2>;
+                reset-names = "usb1_reset", "usb2_reset";
+        };