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AM3354 如何在uboot修改GMII_SEL寄存器



因为使用13年的开发包,刚开始以太网通信一直丢包,后来查出是GMII_SEL的时钟配置出问题,现在在内核中已经修改正确,现在需要请问如何在uboot进行修改。