linux-kernel - Re: [PATCH V4 1/3] dt-bindings: Add optional gpio property to uartps node to support rs485

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Message-ID: <100af9d8-e62d-4488-8138-fd2004454d11@linaro.org>
Date:   Mon, 11 Dec 2023 11:03:10 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Manikanta Guntupalli <manikanta.guntupalli@....com>, git@....com,
        michal.simek@....com, gregkh@...uxfoundation.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        jirislaby@...nel.org, linux-arm-kernel@...ts.infradead.org
Cc:     radhey.shyam.pandey@....com, srinivas.goud@....com,
        shubhrajyoti.datta@....com, manion05gk@...il.com
Subject: Re: [PATCH V4 1/3] dt-bindings: Add optional gpio property to uartps
 node to support rs485

On 11/12/2023 10:11, Manikanta Guntupalli wrote:
> Add optional gpio property to uartps node and reference to rs485.yaml

...

diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.yaml
b/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> index e35ad1109efc..d5dd4e92d1fb 100644
> --- a/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> +++ b/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> @@ -46,6 +46,10 @@ properties:
>    power-domains:
>      maxItems: 1
>  
> +  rts-gpios:
> +    description: Optional GPIO to control transmit/receive.
> +    maxItems: 1

Why do you exactly need it here? It's already allowed, isn't it?


Best regards,
Krzysztof