diff --git a/fdts/morello.dtsi b/fdts/morello.dtsi
index 20640c5..7f39d75 100644
--- a/fdts/morello.dtsi
+++ b/fdts/morello.dtsi
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -88,6 +88,13 @@
 		clock-output-names = "apb_pclk";
 	};
 
+	soc_refclk85mhz: refclk85mhz {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <85000000>;
+		clock-output-names = "iofpga:aclk";
+	};
+
 	soc_uartclk:  uartclk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;