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SubjectRe: [PATCH 3/3] PCI: generic: Add support for Cavium ThunderX PCIe root complexes.
On Thu, Sep 17, 2015 at 11:41:34PM +0100, David Daney wrote:
> From: David Daney <david.daney@cavium.com>
>
> The config space for external PCIe root complexes on some Cavium
> ThunderX SoCs is very similar to CAM and ECAM, but differs in the
> shift values that have to be applied to the bus and devfn numbers to
> compose that address window offset. These root complexes also have
> the interesting property that there is no root bridge, so the standard
> manner of limiting scanning to only the first device doesn't work. We
> can use the standard pci-host-generic driver if we make a minor
> addition to handle these differences, so we...
>
> Add a mapping function for ThunderX PCIe root complexes with a bus
> shift of 24 and devfn shift of 16. Ignore accesses for devices other
> than the first device on the primary bus.
>
> Document the whole thing in devicetree/bindings/pci/host-generic-pci.txt
>
> Signed-off-by: David Daney <david.daney@cavium.com>
> ---
> .../devicetree/bindings/pci/host-generic-pci.txt | 8 +++---
> drivers/pci/host/pci-host-generic.c | 29 ++++++++++++++++++++++
> 2 files changed, 34 insertions(+), 3 deletions(-)

Thanks, this looks better now:

Acked-by: Will Deacon <will.deacon@arm.com>

Will


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