Re: [PATCH v10 02/15] dt-bindings: mmc: cdns: Add AMD Pensando Elba SoC

[Krzysztof Kozlowski]

On 06/03/2023 05:07, Brad Larson wrote:
> AMD Pensando Elba ARM 64-bit SoC is integrated with this IP and
> explicitly controls byte-lane enables.
> 
> Signed-off-by: Brad Larson <blarson@xxxxxxx>
> ---
> 
> v10 changes:
> - Move reset-names property definition next to existing resets prop
> - Move allOf to the bottom and set resets/reset-names required only for pensando
> - Fix reg maxItems for existing, must be 1
> 
> v9 changes:
> - Add reset-names and resets properties
> - Add if/then on property amd,pensando-elba-sd4hc to set reg property
>   values for minItems and maxItems
> 
> ---
>  .../devicetree/bindings/mmc/cdns,sdhci.yaml   | 33 ++++++++++++++++---
>  1 file changed, 29 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> index adacd0535c14..0c4d6d4b2b58 100644
> --- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> +++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> @@ -9,19 +9,18 @@ title: Cadence SD/SDIO/eMMC Host Controller (SD4HC)
>  maintainers:
>    - Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
>  
> -allOf:
> -  - $ref: mmc-controller.yaml
> -
>  properties:
>    compatible:
>      items:
>        - enum:
> +          - amd,pensando-elba-sd4hc
>            - microchip,mpfs-sd4hc
>            - socionext,uniphier-sd4hc
>        - const: cdns,sd4hc
>  
>    reg:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 2
>  
>    interrupts:
>      maxItems: 1
> @@ -30,8 +29,13 @@ properties:
>      maxItems: 1
>  
>    resets:
> +    description: physical line number to hardware reset the mmc

This part seems to be not needed anymore. Resets field was already added.

>      maxItems: 1
>  
> +  reset-names:
> +    items:
> +      - const: hw

Why did you add reset-names for one item? There is no v8 of this patch,
so I cannot find previous discussion about it.


>    # PHY DLL input delays:
>    # They are used to delay the data valid window, and align the window to
>    # sampling clock. The delay starts from 5ns (for delay parameter equal to 0)
> @@ -120,6 +124,27 @@ required:
>    - interrupts
>    - clocks
>  
> +allOf:
> +  - $ref: mmc-controller.yaml
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: amd,pensando-elba-sd4hc
> +    then:
> +      properties:
> +        reg:
> +          minItems: 2

Hm, we missed to mention it before, but what is the second reg for? It's
not obvious from the binding so probably you need to describe it instead
minItems:
  items:
    - description: foo
    - description: bar

> +      required:
> +        - reset-names
> +        - resets
> +    else:
> +      properties:
> +        reset-names: false
> +        resets: false
> +        reg:
> +          maxItems: 1
> +
>  unevaluatedProperties: false
>  
>  examples:

Best regards,
Krzysztof