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am5728 sd卡加载问题

Other Parts Discussed in Thread: AM5728

您好,我使用am5728 EVM开发板,在某次开机时不小心弹出SD card,又按回去,进入系统后发现我修改的设备树并没有正确读取,也就是am57xx-evm-reva3.dtb,重新制作sd卡,替换zImage和am57xx-evm-reva3.dtb均不能正常加载,都是加载原有的初版内核和设备树,比方说我把usr led改为spi,但是/sys/class/led仍能找到led设备,后来我把编译的arch/arm/boot/dts/ti/下的两个设备树文件也拷进/rootfs/boot文件夹后,设备树才正常加载。

请问这是什么原因,对系统会有影响吗?如何解决?