linux-kernel - Re: [PATCH v9 02/15] dt-bindings: mmc: cdns: Add AMD Pensando Elba SoC

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Message-ID: <06ed53f8-42eb-4b14-a867-64086e8b9998@linaro.org>
Date:   Thu, 19 Jan 2023 08:48:02 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Brad Larson <blarson@....com>, linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-spi@...r.kernel.org, adrian.hunter@...el.com,
        alcooperx@...il.com, andy.shevchenko@...il.com, arnd@...db.de,
        brad@...sando.io, brendan.higgins@...ux.dev,
        briannorris@...omium.org, brijeshkumar.singh@....com,
        catalin.marinas@....com, davidgow@...gle.com, gsomlo@...il.com,
        gerg@...ux-m68k.org, krzk@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, lee@...nel.org,
        lee.jones@...aro.org, broonie@...nel.org,
        yamada.masahiro@...ionext.com, p.zabel@...gutronix.de,
        piotrs@...ence.com, p.yadav@...com, rdunlap@...radead.org,
        robh+dt@...nel.org, samuel@...lland.org, fancer.lancer@...il.com,
        skhan@...uxfoundation.org, suravee.suthikulpanit@....com,
        thomas.lendacky@....com, tonyhuang.sunplus@...il.com,
        ulf.hansson@...aro.org, vaishnav.a@...com, will@...nel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v9 02/15] dt-bindings: mmc: cdns: Add AMD Pensando Elba
 SoC

On 19/01/2023 04:51, 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@....com>
> 
> ---
> 
> Changes since v6:
> - 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   | 28 ++++++++++++++++++-
>  1 file changed, 27 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> index 8b1a0fdcb5e3..f7dd6f990f96 100644
> --- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> +++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> @@ -16,12 +16,14 @@ 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
> @@ -111,12 +113,36 @@ properties:
>      minimum: 0
>      maximum: 0x7f
>  
> +  reset-names:
> +    items:
> +      - const: hw
> +
> +  resets:
> +    description:
> +      optional. phandle to the system reset controller with line index
> +      for mmc hw reset line if exists.
> +    maxItems: 1
> +
>  required:
>    - compatible
>    - reg
>    - interrupts
>    - clocks
>  
> +if:
> +  properties:
> +    compatible:
> +      const: amd,pensando-elba-sd4hc

BTW, this probably won't even work and that's the answer why you added
fake maxItems: 2... This should make you think about the bug. You must
use contains.

Best regards,
Krzysztof