Enabling MCP251x SPI CAN Controller Driver in Jetson TX1 (J23 SPI0)

tegra210-mcp251x-spi0.dtsi

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Valid for Linux4Tegra v28.1
 *
 * J21 Header SPI1 == bus_num 0
 * Expansion SPI0 == bus_num 3
 * Expansion SPI2 == bus_num 1
 */

/ {
	clocks {
		/* 16MHz external crystal oscillator */
		clk16m: mcp251x_osc {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <16000000>;
		};
	};

	pinmux@700008d4 {
		common {
			touch_rst_pv6 {
				nvidia,pins = "touch_rst_pv6";
				nvidia,pull = <0x2>;
				nvidia,tristate = <0x0>;
				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
			};
		};
	};
	
	/* J23 Expansion Connector SPI0 */
	/* Note the difference in numbering between the connector and device */
	spi@7000da00 {
		status = "okay";
		spi-max-frequency = <2000000>;

		can@0 {
			#address-cells = <0x1>;
			#size-cells = <0x0>;
			compatible = "microchip,mcp2515";
			reg = <0x0>;

			clocks = <&clk16m>;
			interrupt-parent = <&gpio>;
			interrupts = <TEGRA_GPIO(V, 6) IRQ_TYPE_EDGE_FALLING>;
			spi-max-frequency = <2000000>;

			vdd-supply = <&max77620_ldo5>;
			xceiver-supply = <&max77620_ldo5>;
		};
	};
};