linux-kernel - Re: [PATCH v3 01/14] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation

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Message-ID: <CAMuHMdVvjrMXap5CQ-grNYpJfOG6QeN26EW4tR_YE=VFv5ozqw@mail.gmail.com>
Date:   Mon, 26 Aug 2019 09:34:41 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Simon Horman <horms@...ge.net.au>, Ulrich Hecht <uli@...nd.eu>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Koji Matsuoka <koji.matsuoka.xm@...esas.com>, muroya@....co.jp,
        VenkataRajesh.Kalakodima@...bosch.com,
        Harsha.ManjulaMallikarjun@...bosch.com,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v3 01/14] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation

Hi Jacopo,

On Sun, Aug 25, 2019 at 3:50 PM Jacopo Mondi <jacopo+renesas@...ndi.org> wrote:
> Add device tree bindings documentation for the Renesas R-Car Display
> Unit Color Management Module.
>
> CMM is the image enhancement module available on each R-Car DU video
> channel on R-Car Gen2 and Gen3 SoCs (V3H and V3M excluded).
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/renesas,cmm.txt
> @@ -0,0 +1,33 @@
> +* Renesas R-Car Color Management Module (CMM)
> +
> +Renesas R-Car image enhancement module connected to R-Car DU video channels.
> +
> +Required properties:
> + - compatible: shall be one or more of the following:
> +   - "renesas,cmm-r8a7795": for R8A7795 (R-Car H3) compatible CMM.
> +   - "renesas,cmm-r8a7796": for R8A7796 (R-Car M3-W) compatible CMM.
> +   - "renesas,cmm-r8a77965": for R8A77965 (R-Car M3-N) compatible CMM.
> +   - "renesas,cmm-r8a77990": for R8A77990 (R-Car E3) compatible CMM.
> +   - "renesas,cmm-r8a77995": for R8A77995 (R-Car D3) compatible CMM.

Please use "renesas,<socype->-cmm" instead of "renesas,cmm-<soctype>".

> +   - "renesas,rcar-gen3-cmm": for a generic R-Car Gen3 compatible CMM.
> +   - "renesas,rcar-gen2-cmm": for a generic R-Car Gen2 compatible CMM.
> +
> +   When the generic compatible string is specified, the SoC-specific
> +   version corresponding to the platform should be listed first.
> +
> + - reg: the address base and length of the memory area where CMM control
> +   registers are mapped to.
> +
> + - clocks: phandle and clock-specifier pair to the CMM functional clock
> +   supplier.

Thinking about yaml validation:

power-domains?
resets?

> +Example:
> +--------
> +
> +       cmm0: cmm@...40000 {
> +               compatible = "renesas,cmm-r8a7796";
> +               reg = <0 0xfea40000 0 0x1000>;
> +               power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
> +               clocks = <&cpg CPG_MOD 711>;
> +               resets = <&cpg 711>;
> +       };

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