On May 29, 2014, at 10:18 AM, Liviu Dudau <liviu@xxxxxxxxxxx> wrote: > On Thu, May 29, 2014 at 10:03:54AM -0500, Kumar Gala wrote: >> >> On May 29, 2014, at 1:38 AM, Kishon Vijay Abraham I <kishon@xxxxxx> wrote: >> >>> The configuration address space has so far been specified in *ranges*, >>> however it should be specified in *reg* making it a platform MEM resource. >>> Hence used 'platform_get_resource_*' API to get configuration address >>> space in the designware driver. >>> >>> Cc: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> >>> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> >>> Cc: Mohit Kumar <mohit.kumar@xxxxxx> >>> Cc: Jingoo Han <jg1.han@xxxxxxxxxxx> >>> Cc: Marek Vasut <marex@xxxxxxx> >>> Cc: Arnd Bergmann <arnd@xxxxxxxx> >>> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> >>> --- >>> .../devicetree/bindings/pci/designware-pcie.txt | 1 + >>> drivers/pci/host/pcie-designware.c | 17 +++++++++++++++-- >>> 2 files changed, 16 insertions(+), 2 deletions(-) >> >> Why should the cfg space be defined in *reg* instead of ranges? > > Because what you end up using is a struct resource to represent the cfg space and > the conversion between ranges and resources breaks down for CFG space (we don't > have a flag in the resource flags to say this is CFG resource). Specifying it > as a *reg* property makes it a MEM resource and no special casing is needed. > > Best regards, > Liviu Just because the kernel doesn’t handle this is NO reason to change the way the DT works. We are probably better of changing of_bus_pci_get_flags() to set IORESOURCE_MEM for cfg type. Will send a patch for this. - k -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- 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
