[RFC][PATCH v3 2/3] dt-bindings: imx6q-pcie: Handle various PD configurations

[Krzysztof Kozlowski]

On 04/11/2022 18:04, Marek Vasut wrote:
> The i.MX SoCs have various power domain configurations routed into
> the PCIe IP. MX6SX is the only one which contains 2 domains and also
> uses power-domain-names. MX6QDL do not use any domains. All the rest
> uses one domain and does not use power-domain-names anymore.
> 
> Document all those configurations in the DT binding document.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
> Cc: Lucas Stach <l.stach at pengutronix.de>
> Cc: Richard Zhu <hongxing.zhu at nxp.com>
> Cc: Rob Herring <robh+dt at kernel.org>
> Cc: Shawn Guo <shawnguo at kernel.org>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: NXP Linux Team <linux-imx at nxp.com>
> To: devicetree at vger.kernel.org
> ---
> V2: - Keep the power-domains description in the main section
> V3: - Move power-domains back where they were originally (fixes V2)
>     - Do not use else: in allOf section
> ---
>  .../bindings/pci/fsl,imx6q-pcie.yaml          | 31 ++++++++++++++++++-
>  1 file changed, 30 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> index 44c65d3ec07b9..5d731aca34b4d 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> @@ -67,13 +67,13 @@ properties:
>        required properties for imx7d-pcie and imx8mq-pcie.
>  
>    power-domains:
> +    minItems: 1
>      items:
>        - description: The phandle pointing to the DISPLAY domain for
>            imx6sx-pcie, to PCIE_PHY power domain for imx7d-pcie and
>            imx8mq-pcie.
>        - description: The phandle pointing to the PCIE_PHY power domains
>            for imx6sx-pcie.
> -
>    power-domain-names:
>      items:
>        - const: pcie
> @@ -222,6 +222,35 @@ allOf:
>              - const: pcie_bus
>              - const: pcie_aux
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: fsl,imx6sx-pcie
> +    then:
> +      properties:
> +        power-domains:
> +          minItems: 2
> +          maxItems: 2
> +        power-domain-names:
> +          minItems: 2
> +          maxItems: 2
> +
> +  - if:
> +      not:
> +        properties:
> +          compatible:
> +            contains:
> +              enum:
> +                - fsl,imx6q-pcie
> +                - fsl,imx6qp-pcie

This is confusing... your previous entry fsl,imx6sx-pcie falls into this
one, because it is a if-not-then.

This also does not really match your commit msg.

> +    then:
> +      properties:
> +        power-domains:
> +          minItems: 1

Drop minItems, it cannot be less than 1.

> +          maxItems: 1
> +        power-domain-names: false
> +
>  examples:
>    - |
>      #include <dt-bindings/clock/imx6qdl-clock.h>

Best regards,
Krzysztof