linux-kernel - Re: [PATCH 1/3] dt-bindings: mmc: imx-esdhc: Change imx8mn and imx8mp compatible fallback

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Message-ID: <35f58894-ed6d-0af0-e483-7a161ad6625a@kernel.org>
Date:   Wed, 23 Mar 2022 14:56:09 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Adam Ford <aford173@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     aford@...conembedded.com, Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: mmc: imx-esdhc: Change imx8mn and imx8mp
 compatible fallback

On 23/03/2022 14:40, Adam Ford wrote:
> The SDHC controller in the imx8mn and imx8mp have the same controller
> as the imx8mm which is slightly different than that of the imx7d.
> Using the fallback of the imx8mm enables the controllers to support
> HS400-ES which is not available on the imx7d.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> 
> diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
> index 7dbbcae9485c..d6ea73d76bdd 100644
> --- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
> +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
> @@ -39,14 +39,14 @@ properties:
>        - items:
>            - enum:
>                - fsl,imx8mm-usdhc

Your change looks reasonable, but why imx8mm is compatible with imx7d?

> -              - fsl,imx8mn-usdhc
> -              - fsl,imx8mp-usdhc
>                - fsl,imx8mq-usdhc
>                - fsl,imx8qm-usdhc
>                - fsl,imx8qxp-usdhc
>            - const: fsl,imx7d-usdhc
>        - items:
>            - enum:
> +              - fsl,imx8mn-usdhc
> +              - fsl,imx8mp-usdhc
>                - fsl,imx93-usdhc
>                - fsl,imx8ulp-usdhc
>            - const: fsl,imx8mm-usdhc


Best regards,
Krzysztof