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请问下am5728 pcie 如何配置成x2

yongjun wang
Intellectual 455 points
Other Parts Discussed in Thread: AM5728

大家好，我现在尝试将AM5728 pcie作为RC配置成x2,在设备树arch/arm/boot/dts/dra7.dtsi中313行将num-lanes = <1>;修改为
num-lanes = <2>;通过lspci查看显示的还是x1，显示结果如下图，请问该怎么修改呢，我尝试了各种修改还是不行。