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am335x GPMC问题



hi:all

我现在遇到一个很奇怪的问题,同样的uboot,内核,在SD卡中启动板子,gpmc总线和SC16C554可以正常通信,读写寄存器,配置都是正确的。

将程序烧写到nand中,从nand启动,gpmc总线和SC16C554,通信不正常,读写寄存器都是不正确的,为何?

难道是因为,nand和SC16c554共用gpmc的地址和数据总线的原因吗?应该如何修改呢?