RK3568 spi作slave配置

1、修改内核配置

cd  /RK3568/rk356x_linux_release_v1.3.1_20221120/kernel

cp arch/arm64/configs/rockchip_linux_defconfig  defconfig 

make ARCH=arm64 menuconfig

保存配置

make ARCH=arm64 savedefconfig

Cp defconfig  arch/arm64/configs/rockchip_linux_defconfig

2、修改设备树

master配置：

&spi1 {
    pinctrl-names = "default";
    pinctrl-0 = <&spi1m1_cs0 &spi1m1_pins>;
    status = "okay";
    spi1_dev: spi1-dev@0{
                status = "okay";
                compatible = "rockchip,spidev";
                reg = <0x0>;
                spi-max-frequency = <50000000>;
        };
};

slave配置:

&spi2 {
    pinctrl-names = "default";
    pinctrl-0 = <&spi2m1_cs0 &spi2m1_pins>;
    status = "okay";
    spi-slave; 

    //子节点的命名需以 "slave" 开始
    slave{  
        compatible ="rockchip,spidev";
        reg = <0>;
        id = <0>;
    };
 };

3、重新编译内核，烧写boot.img，查看spi0 spi1 作master，spi2作slave