linux-kernel - Re: [PATCH v6 03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

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Message-ID: <CAMuHMdXeAueSWf50OhTnCxu3tFq6Rq8YLJ=r67WDnOfv0Yv-oA@mail.gmail.com>
Date: Mon, 31 Mar 2025 15:04:29 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Thierry Bultel <thierry.bultel.yh@...renesas.com>
Cc: thierry.bultel@...atsea.fr, linux-renesas-soc@...r.kernel.org, 
	paul.barker.ct@...renesas.com, Rob Herring <robh@...nel.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, linux-kernel@...r.kernel.org, 
	linux-serial@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 03/13] dt-bindings: serial: Add compatible for Renesas
 RZ/T2H SoC in sci

Hi Thierry,

Thanks for the update!

On Mon, 31 Mar 2025 at 14:27, Thierry Bultel
<thierry.bultel.yh@...renesas.com> wrote:
> The SCI of RZ/T2H SoC (a.k.a r9a09g077), as a lot

RSCI in the RZ/T2H SoC ... has

> of similarities with other Renesas SoC like G2L, G3S, V2L;

... with SCI in other ..

> However, it has a different set of registers, and in addition to serial,
> this IP also supports SCIe (encoder), SmartCard, i2c and spi.
> This is why the 'renesas,sci' fallback for generic SCI does not apply for it.
>
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@...renesas.com>

> --- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml

Given we're now using the "RSCI" naming, I think it deserves its own
DT binding document.

> @@ -9,9 +9,6 @@ title: Renesas Serial Communication Interface
>  maintainers:
>    - Geert Uytterhoeven <geert+renesas@...der.be>
>
> -allOf:
> -  - $ref: serial.yaml#
> -
>  properties:
>    compatible:
>      oneOf:
> @@ -22,6 +19,8 @@ properties:
>                - renesas,r9a07g054-sci     # RZ/V2L
>            - const: renesas,sci            # generic SCI compatible UART
>
> +      - const: renesas,r9a09g077-sci      # RZ/T2H

renesas,r9a09g077-rsci

> +
>        - items:
>            - const: renesas,sci            # generic SCI compatible UART
>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds