linux-kernel - Re: [PATCH v3 4/5] media: dt-bindings: media: renesas,drif: Add r8a77965 support

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Message-ID: <CAMuHMdUxCiwjsFRYpVND-FLajaceUf+jWK0ZBR5Rp5xJ+MPDgA@mail.gmail.com>
Date:   Wed, 14 Oct 2020 15:37:35 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Fabrizio Castro <fabrizio.castro.jz@...esas.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Ramesh Shanmugasundaram <rashanmu@...il.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v3 4/5] media: dt-bindings: media: renesas,drif: Add
 r8a77965 support

Hi Fabrizio,

On Tue, Oct 13, 2020 at 5:02 PM Fabrizio Castro
<fabrizio.castro.jz@...esas.com> wrote:
> The r8a77965 (a.k.a. R-Car M3-N) device tree schema is
> compatible with the already documented R-Car Gen3 devices.
>
> Document r8a77965 support within renesas,drif.yaml.
>
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>

Thanks for your patch!

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

> --- a/Documentation/devicetree/bindings/media/renesas,drif.yaml
> +++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
> @@ -53,6 +53,7 @@ properties:
>        - enum:
>          - renesas,r8a7795-drif        # R-Car H3
>          - renesas,r8a7796-drif        # R-Car M3-W
> +        - renesas,r8a77965-drif       # R-Car M3-N
>          - renesas,r8a77990-drif       # R-Car E3
>        - const: renesas,rcar-gen3-drif # Generic R-Car Gen3 compatible device

I guess you're aware M3-N (and E3) have an extra register?
Probably the driver just relies on its initial value, but it never hurts to be
explicit and initialize it properly.

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