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@renesas.com>
---
 .../dts/renesas/r9a09g057h44-rzv2h-evk.dts    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057h44-rzv2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g057h44-rzv2h-evk.dts
index 5c06bce3d5b4..7fff8bea9494 100644
--- 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";
+
+		key-wakeup {
+			interrupts-extended = <&icu 0 IRQ_TYPE_EDGE_FALLING>;
+			linux,code = <KEY_WAKEUP>;
+			label = "NMI_SW";
+			debounce-interval = <20>;
+			wakeup-source;
+		};
+	};
+
 	memory@48000000 {
 		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";
+	};
+
 	scif_pins: scif {
 		pins = "SCIF_TXD", "SCIF_RXD";
 		renesas,output-impedance = <1>;
-- 
2.51.0

Hi Ovidiu,

On Mon, 27 Oct 2025 at 15:07, Ovidiu Panait
<ovidiu.panait.rb@renesas.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@renesas.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@48000000 {
>                 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.

> +       };
> +
>         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@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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