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

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Message-ID: <20251027140651.18367-1-ovidiu.panait.rb@renesas.com>
Date: Mon, 27 Oct 2025 14:06:51 +0000
From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
To: geert+renesas@...der.be,
	magnus.damm@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Add NMI pushbutton support

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>
---
 .../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@...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";
+	};
+
 	scif_pins: scif {
 		pins = "SCIF_TXD", "SCIF_RXD";
 		renesas,output-impedance = <1>;
-- 
2.51.0