hi, all: The problem is now solved. In the sbc8548.dts file, the resource that is allocated to pcie controller is not suitable for my card. Actually, I think it is a typo, the range that is allocated to pcie io is 0x08000000, now I change it to 0x00800000. Then my serial card work OK! Is this is a bug in sbc8548.dts?
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