Birkin Shen birkin_shen-at-usish.com |u-boot-users| wrote:

I defined CONFIG_PCI_PNP to support PCI Bus by PNP.

Now I want to have POST function for devices on PCI Bus, but I'm not sure about whether the function pci_init() has done the POST work.

I think the pci_init() hasn't done the POST work, am I right?

The CONFIG_PCI_PNP flag turns on u-boot doing a pci resource allocation. This causes pci_init to scan the PCI bus and map all the BARs and interrupts. That is all it means. Even without this config defined, pci_init turns on the PCI bus for your processor.

In any case, I do not believe U-Boot (pci_init in particular) goes through the PCI devices looking for BIST registers and running self tests.

If you are booting Linux, it is not necessary to do the PNP part. I leave it off on my PPC405GPr based board, and Linux does the right thing.