linux-kernel - RE: [PATCH] arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Add NMI pushbutton support

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Message-ID:
 <TY7PR01MB149100957580E90D7022DCF19D3CDA@TY7PR01MB14910.jpnprd01.prod.outlook.com>
Date: Thu, 13 Nov 2025 15:22:43 +0000
From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
To: geert <geert@...ux-m68k.org>
CC: magnus.damm <magnus.damm@...il.com>, "robh@...nel.org" <robh@...nel.org>,
	"krzk+dt@...nel.org" <krzk+dt@...nel.org>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>, "linux-renesas-soc@...r.kernel.org"
	<linux-renesas-soc@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Add NMI
 pushbutton support

Hi Geert,

> -----Original Message-----
> From: Geert Uytterhoeven <geert@...ux-m68k.org>
> Sent: Thursday, November 13, 2025 4:49 PM
> To: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
> Cc: magnus.damm <magnus.damm@...il.com>; robh@...nel.org;
> krzk+dt@...nel.org; conor+dt@...nel.org; linux-renesas-
> soc@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: Re: [PATCH] arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Add NMI
> pushbutton support
> 
> Hi Ovidiu,
> 
> On Mon, 27 Oct 2025 at 15:07, Ovidiu Panait
> <ovidiu.panait.rb@...esas.com> wrote:
> > RZ/V2H EVK has a user pushbutton connected to the SoC NMI pin, which
> > can be used to wake up the system from suspend to idle. Add a DT node
> > in the device tree to instantiate the gpio-keys driver for this button.
> >
> > Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
> 
> Thanks for your patch!
> 
> > --- a/arch/arm64/boot/dts/renesas/r9a09g057h44-rzv2h-evk.dts
> > +++ b/arch/arm64/boot/dts/renesas/r9a09g057h44-rzv2h-evk.dts
> > @@ -9,6 +9,7 @@
> >
> >  #include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
> >  #include <dt-bindings/gpio/gpio.h>
> > +#include <dt-bindings/input/input.h>
> >  #include "r9a09g057.dtsi"
> >
> >  / {
> > @@ -34,6 +35,20 @@ chosen {
> >                 stdout-path = "serial0:115200n8";
> >         };
> >
> > +       keys: keys {
> > +               compatible = "gpio-keys";
> > +               pinctrl-0 = <&nmi_pins>;
> > +               pinctrl-names = "default";
> 
> Do you need these pinctrl properties? ...
> 
> > +
> > +               key-wakeup {
> > +                       interrupts-extended = <&icu 0
> IRQ_TYPE_EDGE_FALLING>;
> > +                       linux,code = <KEY_WAKEUP>;
> > +                       label = "NMI_SW";
> > +                       debounce-interval = <20>;
> > +                       wakeup-source;
> > +               };
> > +       };
> > +
> >         memory@...00000 {
> >                 device_type = "memory";
> >                 /* first 128MB is reserved for secure area. */
> > @@ -320,6 +335,10 @@ i2c8_pins: i2c8 {
> >                          <RZV2H_PORT_PINMUX(0, 7, 1)>; /* I2C8_SCL */
> >         };
> >
> > +       nmi_pins: nmi {
> > +               pins = "NMI";
> 
> ... as no actual pin configuration is done here?
> 
> If you confirm, I can drop these while applying.
> 

Yes, the pin config is not needed, please drop it before applying.

Thanks!
Ovidiu

> > +       };
> > +
> >         scif_pins: scif {
> >                 pins = "SCIF_TXD", "SCIF_RXD";
> >                 renesas,output-impedance = <1>;
> 
> The rest LGTM, so with the above fixed:
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> 
> 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