diff --git a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
index 895f0bd9f754..f424b827fcbc 100644
--- a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
@@ -135,6 +135,17 @@ &i2c0 {
 	status = "okay";
 	clock-frequency = <400000>;
 
+	io_expander_a: gpio@20 {
+		compatible = "onnn,pca9654";
+		reg = <0x20>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+	};
+
 	eeprom@50 {
 		compatible = "rohm,br24g01", "atmel,24c01";
 		label = "cpu-board";