diff --git a/arch/arm/boot/dts/r7s72100-genmai.dts b/arch/arm/boot/dts/r7s72100-genmai.dts
index 118a8e2b86bd..52a7b586bac7 100644
--- a/arch/arm/boot/dts/r7s72100-genmai.dts
+++ b/arch/arm/boot/dts/r7s72100-genmai.dts
@@ -44,6 +44,10 @@
 	clock-frequency = <48000000>;
 };
 
+&rtc_x1_clk {
+	clock-frequency = <32768>;
+};
+
 &mtu2 {
 	status = "okay";
 };
@@ -59,6 +63,10 @@
 	};
 };
 
+&rtc {
+	status = "okay";
+};
+
 &scif2 {
 	status = "okay";
 };