Re: [PATCH V3 1/2] dt-bindings: PCI: tegra234: Add ECAM support

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On Mon, Dec 05, 2022 at 05:41:55PM -0600, Rob Herring wrote:
> On Thu, Nov 17, 2022 at 3:38 PM Thierry Reding <thierry.reding@xxxxxxxxx> wrote:
> >
> > On Mon, Nov 14, 2022 at 03:53:32PM +0000, Jon Hunter wrote:
> > > From: Vidya Sagar <vidyas@xxxxxxxxxx>
> > >
> > > Add support for ECAM aperture that is only supported for Tegra234
> > > devices.
> > >
> > > Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
> > > Co-developed-by: Jon Hunter <jonathanh@xxxxxxxxxx>
> > > Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
> > > ---
> > > Changes since V2:
> > > - Avoid duplication of reg items and reg-names
> > > Changes since V1:
> > > - Restricted the ECAM aperture to only Tegra234 devices that support it.
> > >
> > >  .../bindings/pci/nvidia,tegra194-pcie.yaml    | 34 +++++++++++++++++--
> > >  .../devicetree/bindings/pci/snps,dw-pcie.yaml |  2 +-
> > >  2 files changed, 33 insertions(+), 3 deletions(-)
> >
> > Both patches applied now.
> 
> linux-next now fails with this. I suspect it is due to Sergey's
> changes to the DWC schema.
> 
> /builds/robherring/linux-dt/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.example.dtb:
> pcie@14160000: reg-names:4: 'oneOf' conditional failed, one must be
> fixed:
>         'dbi' was expected
>         'dbi2' was expected
>         'ecam' is not one of ['elbi', 'app']
>         'atu' was expected
>         'dma' was expected
>         'phy' was expected
>         'config' was expected
>         /builds/robherring/linux-dt/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.example.dtb:
> pcie@14160000: reg-names:4: 'oneOf' conditional failed, one must be
> fixed:
>                 'ecam' is not one of ['apb', 'mgmt', 'link', 'ulreg', 'appl']
>                 'ecam' is not one of ['atu_dma']
>                 'ecam' is not one of ['smu', 'mpu']
>         From schema:
> /builds/robherring/linux-dt/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml

Stephen reported the other day that he wasn't able to resolve this
conflict in linux-next, so he dropped the ECAM bits. The ECAM patch has
now propagated to ARM SoC so it can't be easily backed out, but I guess
we could revert on that tree and instead apply the patch to the DT tree
and resolve the conflict there.

I guess the better alternative would be to try and resolve the merge
properly and let Stephen (and Linus) know.

Thierry

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