1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/net/mdio-gpio.txt b/kernel/Documentation/devicetree/bindings/net/mdio-gpio.txt
new file mode 100644
index 000000000..8dbcf8295
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/net/mdio-gpio.txt
@@ -0,0 +1,26 @@
+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>;
+};