linux-kernel - Re: [PATCH v3 6/8] dt-bindings: soc: renesas: Add the Renesas RZ/N1 GPIO Interrupt Multiplexer

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Message-ID: <20250918171502.411c3527@bootlin.com>
Date: Thu, 18 Sep 2025 17:15:02 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Conor Dooley <conor@...nel.org>
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 6/8] dt-bindings: soc: renesas: Add the Renesas RZ/N1
 GPIO Interrupt Multiplexer

Hi Conor,

On Thu, 18 Sep 2025 16:06:04 +0100
Conor Dooley <conor@...nel.org> wrote:

> On Thu, Sep 18, 2025 at 12:40:04PM +0200, Herve Codina (Schneider Electric) 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>
> > ---
> >  .../soc/renesas/renesas,rzn1-gpioirqmux.yaml  | 87 +++++++++++++++++++
> >  1 file changed, 87 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/soc/renesas/renesas,rzn1-gpioirqmux.yaml  
> 
> This is an interrupt controller, please move it to that subdirectory.

Not so sure. It is a nexus node. It routes interrupt signals to the
interrupt controller (interrupt-map) but it is not an interrupt controller
itself.

I am not sure that it should be moved to the interrupt-controller
directory.

> Otherwise,
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Best regards,
Hervé