linux-kernel - Re: [PATCH V2 3/3] dt-bindings: serial: fsl-lpuart: add imx8ulp compatible string

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Date:   Mon, 26 Jun 2023 17:46:50 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sherry Sun <sherry.sun@....com>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
        shenwei.wang@....com, gregkh@...uxfoundation.org
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel@...gutronix.de, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-imx@....com
Subject: Re: [PATCH V2 3/3] dt-bindings: serial: fsl-lpuart: add imx8ulp
 compatible string

On 26/06/2023 06:48, Sherry Sun wrote:
> Add imx8ulp compatible string in lpuart dt-binding, also correct the
> imx93 compatible here, imx93/imx8ulp add some new features based on
> imx7ulp lpuart, so need to add "fsl,imx8ulp-lpuart" for imx93 to enable
> those new features.
> 
> Signed-off-by: Sherry Sun <sherry.sun@....com>
> ---
>  Documentation/devicetree/bindings/serial/fsl-lpuart.yaml | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
> index 93062403276b..272bfbb1cdfc 100644
> --- a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
> +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
> @@ -21,12 +21,15 @@ properties:
>            - fsl,ls1021a-lpuart
>            - fsl,ls1028a-lpuart
>            - fsl,imx7ulp-lpuart
> +          - fsl,imx8ulp-lpuart

I don't understand this. Commit msg also does not explain this.

>            - fsl,imx8qxp-lpuart
>            - fsl,imxrt1050-lpuart
>        - items:
> -          - enum:
> -              - fsl,imx93-lpuart
> -              - fsl,imx8ulp-lpuart

This could have stayed as enum with one entry which would make your diff
more readable.

> +          - const: fsl,imx8ulp-lpuart
> +          - const: fsl,imx7ulp-lpuart


Best regards,
Krzysztof