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Message-ID: <35f58894-ed6d-0af0-e483-7a161ad6625a@kernel.org>
Date:   Wed, 23 Mar 2022 14:56:09 +0100
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Subject: Re: [PATCH 1/3] dt-bindings: mmc: imx-esdhc: Change imx8mn and imx8mp
 compatible fallback
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To:     Adam Ford <aford173@gmail.com>,
        linux-arm-kernel@lists.infradead.org
Cc:     aford@beaconembedded.com, Ulf Hansson <ulf.hansson@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzk+dt@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        NXP Linux Team <linux-imx@nxp.com>,
        linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20220323134019.3796178-1-aford173@gmail.com>
From:   Krzysztof Kozlowski <krzk@kernel.org>
In-Reply-To: <20220323134019.3796178-1-aford173@gmail.com>
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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@gmail.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