linux-kernel - Re: [PATCH 02/19] dt-bindings: serial: rsci: Drop "uart-has-rtscts: false"

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Message-ID: <20251028-griminess-undocked-b6918de546fc@spud>
Date: Tue, 28 Oct 2025 19:28:22 +0000
From: Conor Dooley <conor@...nel.org>
To: Biju Das <biju.das.jz@...renesas.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.au@...il.com>
Subject: Re: [PATCH 02/19] dt-bindings: serial: rsci: Drop "uart-has-rtscts:
 false"

On Mon, Oct 27, 2025 at 03:45:49PM +0000, Biju Das wrote:
> Drop "uart-has-rtscts: false" from binding as the IP support hardware
> flow control.

Why is it being removed, rather than only being required for the
existing devices? It's not clear to me that the comment about the IP
supporting flow control excludes the integration on these particular
devices from somehow having flow control disabled.

> 
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> ---
>  Documentation/devicetree/bindings/serial/renesas,rsci.yaml | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
> index f50d8e02f476..6b1f827a335b 100644
> --- a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
> @@ -54,8 +54,6 @@ properties:
>    power-domains:
>      maxItems: 1
>  
> -  uart-has-rtscts: false
> -
>  required:
>    - compatible
>    - reg
> -- 
> 2.43.0
> 

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