linux-kernel - Re: [PATCH v2 1/2] dt-bindings: PCI: mediatek-gen3: add SoC based clock config

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Message-ID: <61c0b62af62ddd0e98378159db2b7d94022c9bf5.camel@mediatek.com>
Date:   Fri, 28 Oct 2022 17:24:36 +0800
From:   Jianjun Wang <jianjun.wang@...iatek.com>
To:     Frank Wunderlich <linux@...web.de>,
        <linux-mediatek@...ts.infradead.org>
CC:     Frank Wunderlich <frank-w@...lic-files.de>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: PCI: mediatek-gen3: add SoC based
 clock config

Hi Frank,

After apply this patch, we found some dtbs_check error with the
following patch which adds the PCIe node for MT8195:

https://lore.kernel.org/linux-pci/20221020111925.30002-3-tinghan.shen@mediatek.com/

arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dtb: pcie@...f0000
: clock-names:        5: 'top_133m' was expected
    From schema: Documentation/devicetree/bindings/pci/mediatek-pcie-
gen3.yaml
arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dtb: pcie@...f8000
: clock-names:        5: 'top_133m' was expected
    From schema: Documentation/devicetree/bindings/pci/mediatek-pcie-
gen3.yaml

Did you get the same error when adding the PCIe node for MT7986?

Thanks. 

On Tue, 2022-10-25 at 09:28 +0200, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@...lic-files.de>
> 
> The PCIe driver covers different SOC which needing different clock
> configs. Define them based on compatible.
> 
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
> v2:
> - fix typo in mediatek,mt8192-pcie
> ---
>  .../bindings/pci/mediatek-pcie-gen3.yaml      | 48 ++++++++++++++---
> --
>  1 file changed, 36 insertions(+), 12 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-
> gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-
> gen3.yaml
> index c00be39af64e..98d3f0f1cd76 100644
> --- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> @@ -43,9 +43,6 @@ description: |+
>    each set has its own address for MSI message, and supports 32 MSI
> vectors
>    to generate interrupt.
>  
> -allOf:
> -  - $ref: /schemas/pci/pci-bus.yaml#
> -
>  properties:
>    compatible:
>      oneOf:
> @@ -84,15 +81,7 @@ properties:
>      maxItems: 6
>  
>    clock-names:
> -    items:
> -      - const: pl_250m
> -      - const: tl_26m
> -      - const: tl_96m
> -      - const: tl_32k
> -      - const: peri_26m
> -      - enum:
> -          - top_133m        # for MT8192
> -          - peri_mem        # for MT8188/MT8195
> +    maxItems: 6
>  
>    assigned-clocks:
>      maxItems: 1
> @@ -138,6 +127,41 @@ required:
>    - '#interrupt-cells'
>    - interrupt-controller
>  
> +allOf:
> +  - $ref: /schemas/pci/pci-bus.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt8192-pcie
> +    then:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: pl_250m
> +            - const: tl_26m
> +            - const: tl_96m
> +            - const: tl_32k
> +            - const: peri_26m
> +            - const: top_133m
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt8188-pcie
> +              - mediatek,mt8195-pcie
> +    then:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: pl_250m
> +            - const: tl_26m
> +            - const: tl_96m
> +            - const: tl_32k
> +            - const: peri_26m
> +            - const: peri_mem
> +
>  unevaluatedProperties: false
>  
>  examples: