Thanks for your reply. So there are no PCI device resource info in
flat device tree.
How do PCI device resources be assign in general case or is there any examp=
le?
I am so confusing, would you please give me detailed describle?

BRs, H. Johnny

With flat device trees, PCI devices are not typically included as they
can be probed instead. =A0Interrupt mapping is conveyed by the
interrupt-map property in the PCI controller node.

-Scott