diff --git a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
index 507b5b567a36..7bcdfa06155b 100644
--- a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
+++ b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
@@ -7,6 +7,7 @@
 /dts-v1/;
 #include <dt-bindings/gpio/gpio.h>
 #include "mt6795.dtsi"
+#include "mt6331.dtsi"
 
 / {
 	model = "Sony Xperia M5";
@@ -239,6 +240,15 @@ pins-tx {
 	};
 };
 
+&pmic {
+	/*
+	 * Smartphones, including the Xperia M5, are equipped with a companion
+	 * MT6332 PMIC: when this is present, the main MT6331 PMIC will fire
+	 * an interrupt on the companion, so we use the MT6332 IRQ GPIO.
+	 */
+	interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>;
+};
+
 &uart0 {
 	status = "okay";