OrangePi应用笔记：增加spidev

step1： 配置  CONFIG_SPI_SPIDEV=y

Device Drivers --->
[*]  SPI support --->
[*]    User mode SPI device driver support

step2：配置 dts （Device Tree Source）

 vim kernel/arch/arm64/boot/dts/sun50iw2p1.dtsi

 找到约853行左右，添加红色区域代码如下：

		spi1: spi@01c69000 {
			#address-cells = <1>;
			#size-cells = <0>;
			compatible = "allwinner,sun50i-spi";
			device_type = "spi1";
			reg = <0x0 0x01c69000 0x0 0x1000>;
			interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&clk_pll_periph0>, <&clk_spi1>;
			clock-frequency = <100000000>;
			pinctrl-names = "default", "sleep";
			pinctrl-0 = <&spi1_pins_a &spi1_pins_b>;
			pinctrl-1 = <&spi1_pins_c>;
			spi1_cs_number = <1>;
			spi1_cs_bitmap = <1>;
			status = "okay";

			spidev@0x00 {
				compatible = "spidev";
				spi-max-frequency = <1200000>;
				reg = <0>;
			};
		};

step3：修改sys_config.fex文件

位置：external（与kernel同级的文件目录中）/sys_config/OrangePiH5_PC2_sys_config.fex

修改内容参考：http://linux-sunxi.org/SPIdev

编译内核、模块、dtbs，下载到SD卡中，重启装置：

ls /dev/