Apalis iMX8 PCIe

[vmetodiev]

Hi,

Well, I found a topic that may be interesting:

Mainstream Linux Kernel and PCIe Devices

I don’t know how to add any such to U-Boot plus our rather old U-Boot version has some issues with PCIe switch enumeration as far as I remember. The easiest would probably be to add it to the drivers/pci/quirks.c file similar as to the Tilera one as shown.

You may also try to enter the U-Boot shell and execute a memory Read/Write to the BAR of the FPGA and figure out what the result is. This way you will identify whether the issue actually lies in pre-Linux hardware initialisation or it is something related to the DeviceTree/Linux/driver(s).