diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
index fd16998b92de0033b01ce06a86a229f59e056935..e3723be251db45ef661200da8a0baa64f94cf4a9 100644
--- a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -210,6 +210,11 @@
 			     <3 IRQ_TYPE_LEVEL_HIGH>;
 	};
 
+	rtc@32 {
+		compatible = "ricoh,r2025sd";
+		reg = <0x32>;
+	};
+
 	as3711@40 {
 		compatible = "ams,as3711";
 		reg = <0x40>;