linux-kernel - Re: [PATCHv6 1/6] dt-bindings: mmc: synopsys-dw-mshc: document "altr,sysmgr-syscon"

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Date:   Wed, 26 Oct 2022 15:50:22 -0500
From:   Rob Herring <robh@...nel.org>
To:     Dinh Nguyen <dinguyen@...nel.org>
Cc:     jh80.chung@...sung.com, ulf.hansson@...aro.org,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCHv6 1/6] dt-bindings: mmc: synopsys-dw-mshc: document
 "altr,sysmgr-syscon"

On Wed, Oct 26, 2022 at 09:16:26AM -0500, Dinh Nguyen wrote:
> Document the optional "altr,sysmgr-syscon" binding that is used to
> access the System Manager register that controls the SDMMC clock
> phase.
> 
> Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
> ---
> v6: make "altr,sysmgr-syscon" optional
> v5: document reg shift
> v4: add else statement
> v3: document that the "altr,sysmgr-syscon" binding is only applicable to
>     "altr,socfpga-dw-mshc"
> v2: document "altr,sysmgr-syscon" in the MMC section
> ---
>  .../bindings/mmc/synopsys-dw-mshc.yaml        | 23 ++++++++++++++++---
>  1 file changed, 20 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.yaml b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.yaml
> index ae6d6fca79e2..0e2024eb9018 100644
> --- a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.yaml
> +++ b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.yaml
> @@ -6,9 +6,6 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>  
>  title: Synopsys Designware Mobile Storage Host Controller Binding
>  
> -allOf:
> -  - $ref: "synopsys-dw-mshc-common.yaml#"
> -
>  maintainers:
>    - Ulf Hansson <ulf.hansson@...aro.org>
>  
> @@ -38,6 +35,26 @@ properties:
>        - const: biu
>        - const: ciu
>  
> +allOf:
> +  - $ref: synopsys-dw-mshc-common.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: altr,socfpga-dw-mshc
> +    then:
> +      properties:
> +        altr,sysmgr-syscon:
> +          $ref: /schemas/types.yaml#/definitions/phandle-array
> +          items:
> +            - description: phandle to the sysmgr node
> +            - description: register offset that controls the SDMMC clock phase
> +            - description: register shift for the smplsel(drive in) setting

This goes in the top-level. Use if/then schema to add constraints, not 
define properties.

> +    else:

Then you'll need to negate the if:  if: { not: { properties: ... }}

> +      properties:
> +        altr,sysmgr-syscon: false
> +
>  required:
>    - compatible
>    - reg
> -- 
> 2.25.1
> 
>