diff --git a/arch/arm/boot/dts/sama5d3xcm.dtsi b/arch/arm/boot/dts/sama5d3xcm.dtsi
index f55ed072c8e6b..b0b1331c1974c 100644
--- a/arch/arm/boot/dts/sama5d3xcm.dtsi
+++ b/arch/arm/boot/dts/sama5d3xcm.dtsi
@@ -18,6 +18,14 @@
 		reg = <0x20000000 0x20000000>;
 	};
 
+	slow_xtal {
+		clock-frequency = <32768>;
+	};
+
+	main_xtal {
+		clock-frequency = <12000000>;
+	};
+
 	ahb {
 		apb {
 			spi0: spi@f0004000 {