linux-kernel - Re: [PATCH v3 7/8] soc: renesas: Add support for Renesas RZ/N1 GPIO Interrupt Multiplexer

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Message-ID: <CAMuHMdWNErzjfqXXgJZOn2viPYmGeuJekY_WLDeK6vzYZzdJmA@mail.gmail.com>
Date: Tue, 14 Oct 2025 15:19:46 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: "Herve Codina (Schneider Electric)" <herve.codina@...tlin.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	Hoan Tran <hoan@...amperecomputing.com>, Linus Walleij <linus.walleij@...aro.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Magnus Damm <magnus.damm@...il.com>, 
	Saravana Kannan <saravanak@...gle.com>, Serge Semin <fancer.lancer@...il.com>, 
	Phil Edworthy <phil.edworthy@...esas.com>, linux-gpio@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, Pascal Eberhard <pascal.eberhard@...com>, 
	Miquel Raynal <miquel.raynal@...tlin.com>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v3 7/8] soc: renesas: Add support for Renesas RZ/N1 GPIO
 Interrupt Multiplexer

Hi Hervé,

On Thu, 18 Sept 2025 at 12:40, Herve Codina (Schneider Electric)
<herve.codina@...tlin.com> wrote:
> On the Renesas RZ/N1 SoC, GPIOs can generate interruptions. Those
> interruption lines are multiplexed by the GPIO Interrupt Multiplexer in
> order to map 32 * 3 GPIO interrupt lines to 8 GIC interrupt lines.
>
> The GPIO interrupt multiplexer IP does nothing but select 8 GPIO
> IRQ lines out of the 96 available to wire them to the GIC input lines.
>
> Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@...tlin.com>

Thanks for your patch!

> --- /dev/null
> +++ b/drivers/soc/renesas/rzn1_irqmux.c

> +static const struct of_device_id irqmux_of_match[] = {
> +       { .compatible = "renesas,rzn1-gpioirqmux", },
> +       { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, irq_mux_of_match);
                           ^^^^^^^^^^^^^^^^
                           irqmux_of_match

Interestingly, this built fine for me before, presumably until commit
5ab23c7923a1d2ae ("modpost: Create modalias for builtin modules")
in v6.18-rc1.

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