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AM3352: AM3352芯片6.0SDK,在Kernel阶段如何设置MPU的工作频率

Part Number: AM3352


环境:SDK6.0,kernel版本3.2.0(无设备树)

我司将之前A33352BZCZ60芯片替换为了AM3352BZCZA100芯片,但是外围电路没有大的变化,所以存在buck器件给MPU供电不足导致内核启动失败的情况,目前在uboot阶段将A100芯片的MPU_PLL强制改为可600Mz,请问在6.0的SDK中,内核阶段可以配置MPU的频率吗?