diff --git a/arch/arm/dts/imx8mp-dhcom-pdk-overlay-eth2xfast.dts b/arch/arm/dts/imx8mp-dhcom-pdk-overlay-eth2xfast.dtso
similarity index 100%
rename from arch/arm/dts/imx8mp-dhcom-pdk-overlay-eth2xfast.dts
rename to arch/arm/dts/imx8mp-dhcom-pdk-overlay-eth2xfast.dtso
diff --git a/arch/arm/dts/imx8mp-dhcom-pdk3-overlay-rev100.dts b/arch/arm/dts/imx8mp-dhcom-pdk3-overlay-rev100.dtso
similarity index 100%
rename from arch/arm/dts/imx8mp-dhcom-pdk3-overlay-rev100.dts
rename to arch/arm/dts/imx8mp-dhcom-pdk3-overlay-rev100.dtso
diff --git a/arch/arm/dts/imx8mp-dhcom-som-overlay-eth1xfast.dts b/arch/arm/dts/imx8mp-dhcom-som-overlay-eth1xfast.dtso
similarity index 100%
rename from arch/arm/dts/imx8mp-dhcom-som-overlay-eth1xfast.dts
rename to arch/arm/dts/imx8mp-dhcom-som-overlay-eth1xfast.dtso
diff --git a/arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dts b/arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dtso
similarity index 91%
rename from arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dts
rename to arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dtso
index 82dadcea96c..f2d768cdf91 100644
--- a/arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dts
+++ b/arch/arm/dts/imx8mp-dhcom-som-overlay-eth2xfast.dtso
@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2023 Marek Vasut <marex@denx.de>
  */
-#include "imx8mp-dhcom-som-overlay-eth1xfast.dts"
+#include "imx8mp-dhcom-som-overlay-eth1xfast.dtso"
 
 /* Dual RMII 100/Full Fast ethernet on this SoM variant. */
 
diff --git a/arch/arm/dts/imx8mp-dhcom-som-overlay-rev100.dts b/arch/arm/dts/imx8mp-dhcom-som-overlay-rev100.dtso
similarity index 100%
rename from arch/arm/dts/imx8mp-dhcom-som-overlay-rev100.dts
rename to arch/arm/dts/imx8mp-dhcom-som-overlay-rev100.dtso