Hi, is it possible to disable PCI PnP via the device tree on a 4xx system?
I am working with a 440EPx board that can be system CPU (with PCI hostbridge) or a PCI adapter board. In the latter setup I want to disable PCI PnP, preferred by manipulating the fdt by U-Boot. The PCI mode is detected by U-Boot through a GPIO signal. I do not want to remove the complete /plb/pci... path of the device tree for adapter mode , because I do not want the PCI bus to be totally invisible. lspci and friends should still show devices on the local PCI bus. The 4xx PCIE fdt handling handles a 'status' and 'device_type' property. These properties behave not the way I need and also they are only available for PCIE. With arch/ppc kernels I did this by returning '1' from ppc_md.pci_exclude_device when PCI PnP should not be done. Even though I could do it the same way with arch/powerpc, I hope that there is a fdt-way. Any ideas? BTW, isn't it a good idea to handle the 'status' and 'device_type' property for PCI in the same way as for PCIE? Matthias _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
