diff --git a/qcom/sun-cdp.dtsi b/qcom/sun-cdp.dtsi
index 28d1a324..e548c260 100644
--- a/qcom/sun-cdp.dtsi
+++ b/qcom/sun-cdp.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 /*
- * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2023-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <dt-bindings/gpio/gpio.h>
@@ -206,7 +206,14 @@
 	resets = <&gcc GCC_SDCC2_BCR>;
 	reset-names = "core_reset";
 
+	/*
+	 * By default, the Sun reference platforms use Level Shifter
+	 * devices with its Feedback Clock signal connects to the MSM.
+	 * Without the external feedback clock, the HS50 mode works at
+	 * reduced frequency at 37.5MHz.
+	 */
 	qcom,uses_level_shifter;
+	qcom,external-fb-clk;
 };
 
 &eusb2_phy0 {
diff --git a/qcom/sun-mtp.dtsi b/qcom/sun-mtp.dtsi
index 22d806c0..6b9b9be8 100644
--- a/qcom/sun-mtp.dtsi
+++ b/qcom/sun-mtp.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 /*
- * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2023-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <dt-bindings/gpio/gpio.h>
@@ -282,7 +282,14 @@
 	resets = <&gcc GCC_SDCC2_BCR>;
 	reset-names = "core_reset";
 
+	/*
+	 * By default, the Sun reference platforms use Level Shifter
+	 * devices with its Feedback Clock signal connects to the MSM.
+	 * Without the external feedback clock, the HS50 mode works at
+	 * reduced frequency at 37.5MHz.
+	 */
 	qcom,uses_level_shifter;
+	qcom,external-fb-clk;
 };
 
 &pmih010x_eusb2_repeater {
diff --git a/qcom/sun-qrd.dtsi b/qcom/sun-qrd.dtsi
index d71a76a4..bb420bf0 100644
--- a/qcom/sun-qrd.dtsi
+++ b/qcom/sun-qrd.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 /*
- * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2023-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <dt-bindings/gpio/gpio.h>
@@ -219,7 +219,14 @@
 	resets = <&gcc GCC_SDCC2_BCR>;
 	reset-names = "core_reset";
 
+	/*
+	 * By default, the Sun reference platforms use Level Shifter
+	 * devices with its Feedback Clock signal connects to the MSM.
+	 * Without the external feedback clock, the HS50 mode works at
+	 * reduced frequency at 37.5MHz.
+	 */
 	qcom,uses_level_shifter;
+	qcom,external-fb-clk;
 };
 
 &eusb2_phy0 {