Re: [PATCH v7 2/7] dt-bindings: intel: document Agilex PCIe Root Port

[matthew . gerlach]

On Sun, 16 Feb 2025, Krzysztof Kozlowski wrote:

> On Sat, Feb 15, 2025 at 09:53:54AM -0600, Matthew Gerlach wrote:
> > The Agilex7f devkit can support PCIe End Points with the appropriate
> > daughter card.
> >
> > Signed-off-by: Matthew Gerlach <matthew.gerlach@xxxxxxxxxxxxxxx>
> > ---
> > v7:
> >  - New patch to series.
> > ---
> >  Documentation/devicetree/bindings/arm/intel,socfpga.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/intel,socfpga.yaml b/Documentation/devicetree/bindings/arm/intel,socfpga.yaml
> > index 2ee0c740eb56..0da5810c9510 100644
> > --- a/Documentation/devicetree/bindings/arm/intel,socfpga.yaml
> > +++ b/Documentation/devicetree/bindings/arm/intel,socfpga.yaml
> > @@ -20,6 +20,7 @@ properties:
> >                - intel,n5x-socdk
> >                - intel,socfpga-agilex-n6000
> >                - intel,socfpga-agilex-socdk
> > +              - intel,socfpga-agilex7f-socdk-pcie-root-port
>
> Compatible should represent the board, so what is here exactly the
> board? 7f? Agilex7f? socdk? Or is it standard agilex-socdk but with some
> things attached?

The board is the Agilex 7 FPGA F-Series Transceiver-Soc Development Kit:
https://www.intel.com/content/www/us/en/products/details/fpga/development-kits/agilex/si-agf014.html

There is not a single, standard agilex-socdk board. There are currently 
three variants. In addition to the F-Series socdk, there are I-Series and 
M-Series devkits:
https://www.intel.com/content/www/us/en/products/details/fpga/development-kits/agilex/si-agi027.html
https://www.intel.com/content/www/us/en/products/details/fpga/development-kits/agilex/agm039.html

> But then, are they attached or you just creat the same board with
> different configuration?
The PCIe Root Port does involve a different FPGA configuration, but 
depending on the board, daughter cards and possibly cables are also 
involved.

> Best regards,
> Krzysztof
Thanks for the feedback,
Matthew Gerlach