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* Microchip MCP251X stand-alone CAN controller device tree bindings

Required properties:
 - compatible: Should be one of the following:
   - "microchip,mcp2510" for MCP2510.
   - "microchip,mcp2515" for MCP2515.
 - reg: SPI chip select.
 - clocks: The clock feeding the CAN controller.
 - interrupts: Should contain IRQ line for the CAN controller.

Optional properties:
 - vdd-supply: Regulator that powers the CAN controller.
 - xceiver-supply: Regulator that powers the CAN transceiver.

Example:
	can0: can@1 {
		compatible = "microchip,mcp2515";
		reg = <1>;
		clocks = <&clk24m>;
		interrupt-parent = <&gpio4>;
		interrupts = <13 0x2>;
		vdd-supply = <&reg5v0>;
		xceiver-supply = <&reg5v0>;
	};