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Message-ID: <20250627201152.GA4114099-robh@kernel.org>
Date: Fri, 27 Jun 2025 15:11:52 -0500
From: Rob Herring <robh@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: jianjun.wang@...iatek.com, ryder.lee@...iatek.com, bhelgaas@...gle.com,
	lpieralisi@...nel.org, kwilczynski@...nel.org,
	manivannan.sadhasivam@...aro.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, matthias.bgg@...il.com,
	linux-pci@...r.kernel.org, linux-mediatek@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v1 2/3] dt-bindings: PCI: mediatek-gen3: Add support for
 MT6991/MT8196

On Mon, Jun 23, 2025 at 02:00:57PM +0200, AngeloGioacchino Del Regno wrote:
> Add compatible strings for MT8196 and MT6991 (which are fully
> compatible between each other) and clock definitions.
> 
> These new SoCs don't have tl_96m and tl_32k clocks, but need
> an AHB to APB bus clock and a low power clock.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../bindings/pci/mediatek-pcie-gen3.yaml      | 35 +++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> index 162406e0691a..02cddf0246ce 100644
> --- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> @@ -52,7 +52,12 @@ properties:
>                - mediatek,mt8188-pcie
>                - mediatek,mt8195-pcie
>            - const: mediatek,mt8192-pcie
> +      - items:
> +          - enum:
> +              - mediatek,mt6991-pcie
> +          - const: mediatek,mt8196-pcie
>        - const: mediatek,mt8192-pcie
> +      - const: mediatek,mt8196-pcie
>        - const: airoha,en7581-pcie
>  
>    reg:
> @@ -212,6 +217,36 @@ allOf:
>  
>          mediatek,pbus-csr: false
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt8196-pcie
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 6
> +
> +        clock-names:
> +          items:
> +            - const: pl_250m
> +            - const: tl_26m
> +            - const: bus
> +            - const: low_power
> +            - const: peri_26m
> +            - const: peri_mem
> +
> +        resets:
> +          minItems: 1

The min is already 1.

> +          maxItems: 2
> +
> +        reset-names:
> +          minItems: 1
> +          maxItems: 2

It would be good to define what the names are. I assume they are fixed 
and not just any of the allowed ones.

> +
> +        mediatek,pbus-csr: false
> +
>    - if:
>        properties:
>          compatible:
> -- 
> 2.49.0
> 

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