itop4412 linux-4.14.2 can设备树

待验证

CONFIG_CAN_MCP251X=y

&pinctrl_1 {
	mcp2515_irq: mcp2515-irq {
		samsung,pins = "gpx0-1";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
	};
};

&spi_2 {
	num-cs = <1>;
	/* 没有使用cs-gpios，需要手动控制 */
	/* cs-gpio = <&gpc1 2 GPIO_ACTIVE_LOW>; */
	cs-gpios = <&gpc1 2 GPIO_ACTIVE_LOW>;
	status = "okay";

	can0: can@0 {
		compatible = "microchip,mcp2515";
		reg = <0>;
		clocks = <&xusbxti>;
		pinctrl-names = "default";
		pinctrl-0 = <&mcp2515_irq>;
		interrupt-parent = <&gpx0>;
		/* 上升沿触发 */
		/* interrupts = <1 IRQ_TYPE_EDGE_RISING>; */
		/* 下降沿触发 */
		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
		vdd-supply = <&reg5v0>;
		xceiver-supply = <&reg5v0>;
		spi-max-frequency = <10000000>;
	};
};

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