Re: [PATCH 1/2] dt-bindings: PCI: Add compatible for AMD Versal2 CPM6 host bridge

[Krzysztof Kozlowski <krzk@kernel.org>]

On 02/04/2026 20:00, Sai Krishna Musham wrote:
> Add the "amd,versal2-cpm6-host" compatible string for AMD Versal2 CPM6
> host bridge.
> 
> CPM6 integrates a Synopsys DesignWare PCIe Root Port controller derived
> from the same IP family as the existing MDB host bridge, but uses a
> newer IP revision, supports PCIe Gen6 operation up to 64 GT/s per lane
> and has differences in register layout.
> 
> A separate compatible string is required to accurately describe the
> CPM6 hardware and allow software to distinguish it from the MDB-based
> host bridge.
> 
> Signed-off-by: Sai Krishna Musham <sai.krishna.musham@amd.com>
> ---
>  .../devicetree/bindings/pci/amd,versal2-mdb-host.yaml         | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml
> index 406c15e1dee1..be5a77908d24 100644
> --- a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml
> +++ b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml
> @@ -15,7 +15,9 @@ allOf:
>  
>  properties:
>    compatible:
> -    const: amd,versal2-mdb-host
> +    enum:
> +      - amd,versal2-mdb-host
> +      - amd,versal2-cpm6-host

Why reversed alphabetical order?

Best regards,
Krzysztof