arm64: dts: renesas: r9a09g056n48-rzv2n-evk: Add NMI wakeup button support

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@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251125224533.294235-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g056n48-rzv2n-evk.dts
index 89154875bb33df8bf1767b604473f0d58c68389a..9af50198d2f1133b0017322591e74462cb13ff67 100644 (file)
--- 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 @@
                };
        };
 
+       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@48000000 {
                device_type = "memory";
                /* first 128MB is reserved for secure area. */