Messages in this thread | | | Date | Thu, 14 Apr 2022 14:27:30 -0500 | From | Bjorn Helgaas <> | Subject | Re: [PATCH v3 1/4] dt-bindings: pci: layerscape-pci: Add a optional property big-endian |
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On Fri, Mar 11, 2022 at 05:49:35PM -0600, Li Yang wrote: > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > This property is to indicate the endianness when accessing the > PEX_LUT and PF register block, so if these registers are > implemented in big-endian, specify this property. > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > Acked-by: Rob Herring <robh@kernel.org> > --- > Documentation/devicetree/bindings/pci/layerscape-pci.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt > index f36efa73a470..215d2ee65c83 100644 > --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt > +++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt > @@ -40,6 +40,10 @@ Required properties: > of the data transferred from/to the IP block. This can avoid the software > cache flush/invalid actions, and improve the performance significantly. > > +Optional properties: > +- big-endian: If the PEX_LUT and PF register block is in big-endian, specify > + this property.
What's the purpose of this? I don't see any code that uses this property.
I guess this might be related to of_device_is_big_endian()? I do see some code that uses of_device_is_big_endian(), but nothing that looks relevant to layerscape in particular.
> Example: > > pcie@3400000 { > -- > 2.25.1 >
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