Re: [PATCH v4 2/5] dt-bindings: pci: cadence: Extend compatible for new EP configurations

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On Thu, Apr 24, 2025 at 09:04:41AM +0800, hans.zhang@xxxxxxxxxxx wrote:
> From: Manikandan K Pillai <mpillai@xxxxxxxxxxx>
> 
> Document the compatible property for HPA (High Performance Architecture)
> PCIe controller EP configuration.

Please explain what makes the new architecture sufficiently different
from the existing one such that a fallback compatible does not work.

Same applies to the other binding patch.

Thanks,
Conor.

> 
> Signed-off-by: Manikandan K Pillai <mpillai@xxxxxxxxxxx>
> Signed-off-by: Hans Zhang <hans.zhang@xxxxxxxxxxx>
> ---
>  .../devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml          | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml
> index 98651ab22103..a7e404e4f690 100644
> --- a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml
> +++ b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml
> @@ -7,14 +7,16 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>  title: Cadence PCIe EP Controller
>  
>  maintainers:
> -  - Tom Joseph <tjoseph@xxxxxxxxxxx>
> +  - Manikandan K Pillai <mpillai@xxxxxxxxxxx>
>  
>  allOf:
>    - $ref: cdns-pcie-ep.yaml#
>  
>  properties:
>    compatible:
> -    const: cdns,cdns-pcie-ep
> +    enum:
> +      - cdns,cdns-pcie-ep
> +      - cdns,cdns-pcie-hpa-ep
>  
>    reg:
>      maxItems: 2
> -- 
> 2.47.1
> 

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