linux-kernel - [PATCH 4/4] arm64: dts: renesas: r9a09g056n48-rzv2n-evk: Add NMI wakeup button support

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Message-ID: <20251125224533.294235-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Tue, 25 Nov 2025 22:45:33 +0000
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 4/4] arm64: dts: renesas: r9a09g056n48-rzv2n-evk: Add NMI wakeup button support

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Add support for the NMI connected user pushbutton on the RZ/V2N EVK.
The button is wired to the SoC NMI input and can be used to wake the
system from low-power states.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 .../boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts     | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts
index 62bac7416fd1..e0d8e8d10386 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts
@@ -8,6 +8,7 @@
 /dts-v1/;
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 #include "r9a09g056.dtsi"
 
 / {
@@ -44,6 +45,18 @@ hdmi_con_out: endpoint {
 		};
 	};
 
+	keys: keys {
+		compatible = "gpio-keys";
+
+		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. */
-- 
2.52.0