linux-kernel - Re: [PATCH RFC 4/5] arm64: dts: renesas: r9a07g043[u]: Update pinctrl node to handle GPIO interrupts

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Date:   Thu, 17 Nov 2022 12:20:21 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Prabhakar <prabhakar.csengg@...il.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH RFC 4/5] arm64: dts: renesas: r9a07g043[u]: Update pinctrl
 node to handle GPIO interrupts

Hi Prabhakar,

On Mon, Nov 7, 2022 at 6:53 PM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Add required properties in pinctrl node to handle GPIO interrupts.
>
> Note as IRQC is not enabled in RZ/Five the phandle for interrupt-parent
> is added in RZ/G2UL specific dtsi so that RZ/Five pinctrl driver
> continues without waiting for IRQC to probe.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Thanks for your patch!

> --- a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> @@ -531,6 +531,8 @@ pinctrl: pinctrl@...30000 {
>                         gpio-controller;
>                         #gpio-cells = <2>;
>                         gpio-ranges = <&pinctrl 0 0 152>;
> +                       #interrupt-cells = <2>;
> +                       interrupt-controller;
>                         clocks = <&cpg CPG_MOD R9A07G043_GPIO_HCLK>;
>                         power-domains = <&cpg>;
>                         resets = <&cpg R9A07G043_GPIO_RSTN>,
> diff --git a/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi b/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi
> index 7a8ed7ae253b..65e7b029361e 100644
> --- a/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi
> @@ -98,6 +98,10 @@ &irqc {
>         resets = <&cpg R9A07G043_IA55_RESETN>;
>  };
>
> +&pinctrl {
> +       interrupt-parent = <&irqc>;
> +};

Do you plan to move it back to the common r9a07g043.dtsi later?
Perhaps it makes sense to move the full irqc node to r9a07g043[uf].dtsi?
There is not that much common left, even the compatible value differs.
We don't keep the few common properties of the cpu0 node in
r9a07g043.dtsi neither.

> +
>  &soc {
>         interrupt-parent = <&gic>;
>

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