[PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Geert Uytterhoeven]

Hi Marek,

On Thu, 4 Sept 2025 at 22:28, Marek Vasut
<marek.vasut+renesas at mailbox.org> wrote:
> Add DT overlay to bind RPi Display 2, both 5" and 7" variant, on
> Retronix R-Car V4H Sparrow Hawk board. All of display output, the
> touch controller, and backlight control have been tested.
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
> ---
> Cc: Conor Dooley <conor+dt at kernel.org>
> Cc: Geert Uytterhoeven <geert+renesas at glider.be>
> Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
> Cc: Magnus Damm <magnus.damm at gmail.com>
> Cc: Rob Herring <robh at kernel.org>
> Cc: devicetree at vger.kernel.org
> Cc: linux-renesas-soc at vger.kernel.org
> ---
> V2: Build also the plain DTBO for each DTO. Each new DTO entry in the
>     Makefile has three lines, the DTBO, combined and DTB targets. This
>     is easy to miss, so note this down for myself.

Thanks for the update!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso

> +&i2c0_mux3 {
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +
> +       mcu: gpio at 45 {
> +               compatible = "raspberrypi,touchscreen-panel-regulator-v2";
> +               reg = <0x45>;
> +               gpio-controller;
> +               #gpio-cells = <2>;
> +               #pwm-cells = <3>;

make dtbs_check:

    arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb:
gpio at 45 (raspberrypi,touchscreen-panel-regulator-v2): '#gpio-cells',
'#pwm-cells', 'gpio-controller' do not match any of the regexes:
'^pinctrl-[0-9]+$'
            from schema $id:
http://devicetree.org/schemas/regulator/raspberrypi,7inch-touchscreen-panel-regulator.yaml#

I noticed you posted patches to fix all other issues in DT bindings
triggered by this series, so I assume you just forgot to post the
fixes for this one (which you authored ;-)?

> +       };

Gr{oetje,eeting}s,

                        Geert

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