linux-kernel - Re: [PATCH v5 1/3] dt-bindings: pinctrl: renesas: document RZ/T2H and RZ/N2H SoCs

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Message-ID: <CAMuHMdVexDsBVqgF2Gn4hJAZbyv3wcsa=X=6E_52ufOWmvZd9Q@mail.gmail.com>
Date: Mon, 11 Aug 2025 14:47:09 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Magnus Damm <magnus.damm@...il.com>, Bartosz Golaszewski <brgl@...ev.pl>, linux-renesas-soc@...r.kernel.org, 
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, 
	Thierry Bultel <thierry.bultel.yh@...renesas.com>
Subject: Re: [PATCH v5 1/3] dt-bindings: pinctrl: renesas: document RZ/T2H and
 RZ/N2H SoCs

Hi Prabhakar,

On Fri, 8 Aug 2025 at 15:30, Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Document the pin and GPIO controller IP for the Renesas RZ/T2H
> (R9A09G077) and RZ/N2H (R9A09G087) SoCs, and add the shared DTSI
> header file used by both the bindings and the driver.
>
> The RZ/T2H SoC supports 729 pins, while the RZ/N2H supports 576 pins.
> Both share the same controller architecture; separate compatible
> strings are added for each SoC to distinguish them.
>
> Co-developed-by: Thierry Bultel <thierry.bultel.yh@...renesas.com>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@...renesas.com>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> ---
> v3->v4:
> - Renamed DT binding file from renesas,rzt2h-pinctrl.yaml to
>   renesas,r9a09g077-pinctrl.yaml
> - Updated the title and description to include RZ/N2H SoC
> - Updated description, fixing the information about mux functions
> - Dropped sd0-sd-tmp-pins sub node from sdhi0_sd_pins in the example node
> - Added reviewed-by tag from Rob

Thanks for the update!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml

> +examples:
> +  - |
> +    #include <dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h>
> +    #include <dt-bindings/pinctrl/renesas,r9a09g077-pinctrl.h>
> +
> +    pinctrl@...c0000 {
> +        compatible = "renesas,r9a09g077-pinctrl";
> +        reg = <0x802c0000 0x2000>,
> +              <0x812c0000 0x2000>,
> +              <0x802b0000 0x2000>;
> +        reg-names = "nsr", "srs", "srn";
> +        clocks = <&cpg CPG_CORE R9A09G077_CLK_PCLKM>;
> +        gpio-controller;
> +        #gpio-cells = <2>;
> +        gpio-ranges = <&pinctrl 0 0 288>;
> +        power-domains = <&cpg>;
> +
> +        serial0-pins {
> +            pinmux = <RZT2H_PORT_PINMUX(38, 0, 1)>, /* Tx */
> +                     <RZT2H_PORT_PINMUX(38, 1, 1)>; /* Rx */
> +        };
> +
> +        sd1-pwr-en-hog {
> +            gpio-hog;
> +            gpios = <RZT2H_GPIO(39, 2) 0>;
> +            output-high;
> +            line-name = "sd1_pwr_en";
> +        };
> +
> +        i2c0-pins {
> +            pins = "RIIC0_SDA", "RIIC0_SCL";
> +            input-enable;
> +        };
> +
> +        sdhi0_sd_pins: sd0-sd-group {

As per my belated comments on v4, I will drop the sdhi0_sd_pins label...

> +            sd0-sd-ctrl-pins {
> +                pinmux = <RZT2H_PORT_PINMUX(12, 0, 0x29)>, /* SD0_CLK */
> +                         <RZT2H_PORT_PINMUX(12, 1, 0x29)>; /* SD0_CMD */
> +            };
> +
> +            sd0-sd-data-pins {

... and the "sd0-sd-" prefixes.

> +                pinmux = <RZT2H_PORT_PINMUX(12, 0, 0x29)>, /* SD0_CLK */
> +                         <RZT2H_PORT_PINMUX(12, 1, 0x29)>; /* SD0_CMD */
> +            };
> +        };
> +    };

> --- /dev/null
> +++ b/include/dt-bindings/pinctrl/renesas,r9a09g077-pinctrl.h

> +#endif /* __DT_BINDINGS_PINCTRL_RENESAS_R9A09G057_PINCTRL_H__ */

G077

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
i.e. will queue in renesas-pinctrl for v6.18.

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