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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 26 Aug 2019 09:28:56 +0200
Message-ID: <CAMuHMdV6_VW-2BYYJ3yNi1i81n2Oeh+Hw+J6ohgqkmjsEjhX+w@mail.gmail.com>
Subject: Re: [PATCH v3 03/14] arm64: dts: renesas: r8a7796: Add CMM units
To:     Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
        Simon Horman <horms@verge.net.au>, Ulrich Hecht <uli@fpond.eu>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Koji Matsuoka <koji.matsuoka.xm@renesas.com>, muroya@ksk.co.jp,
        VenkataRajesh.Kalakodima@in.bosch.com,
        Harsha.ManjulaMallikarjun@in.bosch.com,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        DRI Development <dri-devel@lists.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Hi Jacopo,

On Sun, Aug 25, 2019 at 3:50 PM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Add CMM units to Renesas R-Car M3-W device tree and reference them from
> the Display Unit they are connected to.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
>  arch/arm64/boot/dts/renesas/r8a7796.dtsi | 25 ++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
> index 3dc9d73f589a..8d78e1f98a23 100644
> --- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
> @@ -2613,6 +2613,30 @@
>                         renesas,fcp = <&fcpvi0>;
>                 };
>
> +               cmm0: cmm@fea40000 {
> +                       compatible = "renesas,cmm-r8a7796";

Shouldn't you add "renesas,rcar-gen3-cmm" as a fallback?
(for all CMM nodes in all DT patches)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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