一、功能配置

1、make menuconfig

2、修改设备树

&spi3 {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&spi3m1_cs0 &spi3m1_pins>;
        spi_test@00 {
                compatible = "rockchip,rk-spidev";
                reg = <0>;
                spi-max-frequency = <5000000>;
        };
};

3、修改驱动文件

vim spidev.c
增加compatible 匹配设备树参数。

static const struct spi_device_id spidev_spi_ids[] = {
        { .name = "dh2228fv" },
        { .name = "ltc2488" },
        { .name = "sx1301" },
        { .name = "bk4" },
        { .name = "dhcom-board" },
        { .name = "m53cpld" },
        { .name = "spi-petra" },
        { .name = "spi-authenta" },
        { .name = "rk-spidev" },
        {},
};
static const struct of_device_id spidev_dt_ids[] = {
        { .compatible = "rohm,dh2228fv", .data = &spidev_of_check },
        { .compatible = "lineartechnology,ltc2488", .data = &spidev_of_check },
        { .compatible = "semtech,sx1301", .data = &spidev_of_check },
        { .compatible = "lwn,bk4", .data = &spidev_of_check },
        { .compatible = "dh,dhcom-board", .data = &spidev_of_check },
        { .compatible = "menlo,m53cpld", .data = &spidev_of_check },
        { .compatible = "cisco,spi-petra", .data = &spidev_of_check },
        { .compatible = "micron,spi-authenta", .data = &spidev_of_check },
        { .compatible = "rockchip,rk-spidev", .data = &spidev_of_check },
        {},
};

二、测试spidev设备

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