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diff --git a/Documentation/devicetree/bindings/net/mdio-gpio.txt b/Documentation/devicetree/bindings/net/mdio-gpio.txt
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+++ b/Documentation/devicetree/bindings/net/mdio-gpio.txt
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+MDIO on GPIOs
+
+Currently defined compatibles:
+- virtual,gpio-mdio
+
+MDC and MDIO lines connected to GPIO controllers are listed in the
+gpios property as described in section VIII.1 in the following order:
+
+MDC, MDIO.
+
+Note: Each gpio-mdio bus should have an alias correctly numbered in "aliases"
+node.
+
+Example:
+
+aliases {
+	mdio-gpio0 = <&mdio0>;
+};
+
+mdio0: mdio {
+	compatible = "virtual,mdio-gpio";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	gpios = <&qe_pio_a 11
+		 &qe_pio_c 6>;
+};