系列文章目录

Exynos4412 移植针对Samsung的Linux-6.1（一）下载、配置、编译Linux-6.1
Exynos4412 移植针对Samsung的Linux-6.1（二）SD卡驱动——解决无法挂载SD卡的根文件系统
Exynos4412 移植针对Samsung的Linux-6.1（三）SD卡驱动——解决mmc0: Timeout waiting for hardware interrupt.
Exynos4412 移植针对Samsung的Linux-6.1（四）NandFlash卡驱动
Exynos4412 移植针对Samsung的Linux-6.1（五）DM9000网卡驱动
Exynos4412 移植针对Samsung的Linux-6.1（六）【已解决】SROMC寄存器的数值不正确的问题
Exynos4412 移植Linux-6.1(七)挂载Ramdisk文件系统，【已解决】Couldn’t find valid RAM disk image starting at 0

Exynos4412 移植针对Samsung的Linux-6.1（四）NandFlash卡驱动

在这里插入图片描述
nandflash的型号是KLM8G2FE3B，容量8G，8位数据位，还有CMD和CLK引脚。CBT4412开发板上，NandFlash连接在

Linux6.1对于NandFlash的支持是很全面的、很完善的。关键是对设备树的修改。现记录下来，供大家参考以避坑。
执行make exynos_defconfig之后，内核默认配置就支持NandFlash驱动。只需要在设备树中添加NandFlash的节点就可以了。设备树如下：

&gpy0 {
            srom_ctrl1:srom_ctrl1{
                samsung,pins = "gpy0-1","gpy0-4","gpy0-5";
                samsung,pin-function = <2>; /*samsung,pin-function = <EXYNOS_PIN_FUNC_3>;*/
                samsung,pin-pud = <0>;
                samsung,pin-drv = <3>;
            };
};

&gpy1 {
            srom_ctrl2:srom_ctrl2{
                samsung,pins = "gpy1-0","gpy1-1","gpy1-2","gpy1-3";
                samsung,pin-function = <2>; /*samsung,pin-function = <EXYNOS_PIN_FUNC_3>;*/
                samsung,pin-pud = <0>;
                samsung,pin-drv = <3>;
            };
};

&gpy5 {
            ebi_data1:ebi_data1{
                samsung,pins = "gpy5-0","gpy5-1","gpy5-2","gpy5-3","gpy5-4","gpy5-5","gpy5-6","gpy5-7";
                samsung,pin-function = <2>; /*samsung,pin-function = <EXYNOS_PIN_FUNC_3>;*/
                samsung,pin-pud = <0>;
                samsung,pin-drv = <3>;
            };
    };

&gpy6 {
            ebi_data2:ebi_data2{
                samsung,pins = "gpy6-0","gpy6-1","gpy6-2","gpy6-3","gpy6-4","gpy6-5","gpy6-6","gpy6-7";
                samsung,pin-function = <2>; /*samsung,pin-function = <EXYNOS_PIN_FUNC_3>;*/
                samsung,pin-pud = <0>;
                samsung,pin-drv = <3>;
            };
    };

/* eMMC card deviceTree node
 * mshc_0: mmc@12550000
 */
&mshc_0 {
    pinctrl-0 = <&sd4_clk &sd4_cmd &sd4_bus4 &sd4_bus8>;
    pinctrl-names = "default";
    bus-width = <8>;
    status = "okay";
   //  broken-cd;
    cd-gpios = <&gpk0 2 0>;

    card-detect-delay = <200>;
    samsung,dw-mshc-ciu-div = <3>;
    samsung,dw-mshc-sdr-timing = <2 3>;
    samsung,dw-mshc-ddr-timing = <1 2>;
    cap-mmc-highspeed;

    samsung,removable = <0>;
    fifoth_val = <0x203f0040>;
    bus_hz = <400000000>;
    div = <0x3>;
    index = <4>;
};