【AC590】Nand分区和设备树修改
设备树修改Nand和分区
要点1，要适配内核，5.0的内核，需要修改nand控制器的兼容属性为
compatible ="altr,socfpga-denali-nand";
要点2，添加分区信息
partition@reserved {
label = "reserved";
reg = <0x0 0x300000>;
};
partition@dtb {
label = "dtb";
reg = <0x300000 0x100000>;
};
partition@kernel {
label = "kernel";
reg = <0x400000 0x600000>;
};
partition@rbf {
label = "rbf";
reg = <0xA00000 0x600000>;
};
partition@rootfs {
label = "rootfs";
reg = <0x10000000x1F000000>;
};
修改好的设备树为：
hps_0_nand0:flash@0xff900000{
compatible = "altr,socfpga-denali-nand";
reg = <0xff900000 0x00010000>,
<0xffb80000 0x00010000>;
reg-names = "nand_data", "denali_reg"; /* embeddedsw.dts.params.reg-names typeSTRING */
interrupt-parent = <&hps_0_arm_gic_0>;
interrupts = <0 144 4>;
clocks = <&nand_clk>;
#address-cells = <1>; /*embeddedsw.dts.params.#address-cells type NUMBER */
#size-cells = <1>; /*embeddedsw.dts.params.#size-cells type NUMBER */
status = "okay"; /*embeddedsw.dts.params.status type STRING */
bank-width = <2>;
device-width = <1>;
partition@reserved {
label = "reserved";
reg = <0x0 0x300000>;
};
partition@dtb {
label = "dtb";
reg = <0x300000 0x100000>;
};
partition@kernel {
label = "kernel";
reg = <0x400000 0x600000>;
};
partition@rbf {
label = "rbf";
reg = <0xA00000 0x600000>;
};
partition@rootfs {
label = "rootfs";
reg = <0x10000000x1F000000>;
};
}; //end flash@0xff900000(hps_0_nand0)
如果不修改，报错信息大概如下，意思是说挂不上文件系统，原因是因为nand挂不上。
注意，从网站复制的内容会被加入很多空格换行，记得全部删除，尤其是compatible ="altr,socfpga-denali-nand";
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