can: Allwinner A10/A20 CAN Controller support - Devicetree bindings

Devicetree bindings for Allwinner A10/A20 CAN controller.

Signed-off-by: Gerhard Bertelsmann <info@gerhard-bertelsmann.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/net/can/sun4i_can.txt b/Documentation/devicetree/bindings/net/can/sun4i_can.txt
new file mode 100644 (file)
index 0000000..84ed190
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/sun4i_can.txt
@@ -0,0 +1,36 @@
+Allwinner A10/A20 CAN controller Device Tree Bindings
+-----------------------------------------------------
+
+Required properties:
+- compatible: "allwinner,sun4i-a10-can"
+- reg: physical base address and size of the Allwinner A10/A20 CAN register map.
+- interrupts: interrupt specifier for the sole interrupt.
+- clock: phandle and clock specifier.
+
+Example
+-------
+
+SoC common .dtsi file:
+
+       can0_pins_a: can0@0 {
+               allwinner,pins = "PH20","PH21";
+               allwinner,function = "can";
+               allwinner,drive = <0>;
+               allwinner,pull = <0>;
+       };
+...
+       can0: can@01c2bc00 {
+               compatible = "allwinner,sun4i-a10-can";
+               reg = <0x01c2bc00 0x400>;
+               interrupts = <0 26 4>;
+               clocks = <&apb1_gates 4>;
+               status = "disabled";
+       };
+
+Board specific .dts file:
+
+       can0: can@01c2bc00 {
+               pinctrl-names = "default";
+               pinctrl-0 = <&can0_pins_a>;
+               status = "okay";
+       };