diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
index 8b594e9e9dc1..b7328f9f7d4b 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -417,3 +417,8 @@ &scif0 {
 &scif_clk {
 	clock-frequency = <14745600>;
 };
+
+/* Firmware should reserve it but sadly doesn't */
+&swdt {
+	status = "reserved";
+};
diff --git a/arch/arm64/boot/dts/renesas/r8a77970-v3msk.dts b/arch/arm64/boot/dts/renesas/r8a77970-v3msk.dts
index 6319a66fac95..3de327d642cd 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970-v3msk.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-v3msk.dts
@@ -299,3 +299,8 @@ &scif0 {
 
 	status = "okay";
 };
+
+/* Firmware should reserve it but sadly doesn't */
+&swdt {
+	status = "reserved";
+};