On Sunday, March 02, 2014 3:31 AM, Jason Gunthorpe wrote: > On Fri, Feb 28, 2014 at 04:53:33PM -0800, Tim Harvey wrote: > > > In testing this on IMX6 I'm finding that 'of_irq_parse_and_map_pci()' > > always returns -EINVAL because it can't find a dt node for the host > > bridge: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/of/of_pci_irq.c#n60. > > There may be some kind of issue in the pcie-designware.c: > > static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) > { > struct pci_bus *bus; > struct pcie_port *pp = sys_to_pcie(sys); > > if (pp) { > pp->root_bus_nr = sys->busnr; > bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops, > ^^^^^^^^^^^ > Shouldn't be null for DT cases. > > Perhaps since the driver doesn't pass in a parent pointer, no parent > device is associated with the struct pci_bus that gets created, so > pci_bus_to_OF_node will always fail and the DT PCI mechanisms become > broken. Jason, Thank you for your advice. :-) Tim, I tested the following as Jason guided. You can test i.MX PCIe with this. ./drivers/pci/host/pcie-designware.c @@ -726,7 +727,7 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) if (pp) { pp->root_bus_nr = sys->busnr; - bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops, + bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops, sys, &sys->resources); } else { bus = NULL; However, I think that we may need to replace 'pci_common_init()' with 'pci_common_init_dev()'. Best regards, Jingoo Han -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
