The Renesas R-Car devices (r8a7790 and r8a7791) use two PCI controller drivers, one for an external PCIe slot, the other for an internal PCI bridge to USB controllers. However, they currently do not work at the same time as they use the same PCI domain and use the same root bus number. We can't use different root bus numbers due to the way root bus numbers are assigned in pcibios_init_hw() in arch/arm/kernel/bios32.c. Since the two PCI controllers are completely independent, I think it makes sense to use different PCI domains for them. I've marked the third patch as RFC as I am not sure of the impact of enabling PCI domains for all ARM devices. In the march to 'one kernel to rule them all', I steered clear of mach specific changes. These patches require the following patch from Liviu Dudau: [PATCH v11 07/10] OF: Introduce helper function for getting PCI domain_nr Based on comments on this patch from Jason Gunthorpe, there is still the issue that the domain numbers may change depending on the ordering at probe time. However, this can be fixed later on by adding the entries in the DT files. Phil Edworthy (3): PCI: rcar-pcie: Add call to get domain nr PCI: rcar-internal-pci: Add call to get domain nr ARM: Enable PCI domains arch/arm/Kconfig | 2 +- drivers/pci/host/pci-rcar-gen2.c | 6 ++++++ drivers/pci/host/pcie-rcar.c | 9 ++++++--- 3 files changed, 13 insertions(+), 4 deletions(-) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
