diff --git a/arch/arm/dts/k3-j7200-r5-common-proc-board.dts b/arch/arm/dts/k3-j7200-r5-common-proc-board.dts
index 0491432060..9963746c1d 100644
--- a/arch/arm/dts/k3-j7200-r5-common-proc-board.dts
+++ b/arch/arm/dts/k3-j7200-r5-common-proc-board.dts
@@ -79,6 +79,16 @@
 		mboxes= <&mcu_secproxy 4>, <&mcu_secproxy 5>;
 		mbox-names = "tx", "rx";
 	};
+
+	dm_tifs: dm-tifs {
+		compatible = "ti,j721e-dm-sci";
+		ti,host-id = <3>;
+		ti,secure-host;
+		mbox-names = "rx", "tx";
+		mboxes= <&mcu_secproxy 21>,
+			<&mcu_secproxy 23>;
+		u-boot,dm-spl;
+	};
 };
 
 &dmsc {
@@ -276,4 +286,11 @@
 	};
 };
 
+&mcu_ringacc {
+	ti,sci = <&dm_tifs>;
+};
+
+&mcu_udmap {
+	ti,sci = <&dm_tifs>;
+};
 #include "k3-j7200-common-proc-board-u-boot.dtsi"
diff --git a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
index 325e570d9a..a12607dc2f 100644
--- a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
+++ b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
@@ -74,6 +74,16 @@
 		power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
 		#thermal-sensor-cells = <1>;
 	};
+
+	dm_tifs: dm-tifs {
+		compatible = "ti,j721e-dm-sci";
+		ti,host-id = <3>;
+		ti,secure-host;
+		mbox-names = "rx", "tx";
+		mboxes= <&mcu_secproxy 21>,
+			<&mcu_secproxy 23>;
+		u-boot,dm-spl;
+	};
 };
 
 &cbass_main {
@@ -343,3 +353,11 @@
 		u-boot,dm-spl;
 	};
 };
+
+&mcu_ringacc {
+	ti,sci = <&dm_tifs>;
+};
+
+&mcu_udmap {
+	ti,sci = <&dm_tifs>;
+};
diff --git a/doc/device-tree-bindings/firmware/ti,j721e-dm-sci.txt b/doc/device-tree-bindings/firmware/ti,j721e-dm-sci.txt
index f7c6da1af3..0217341f0c 100644
--- a/doc/device-tree-bindings/firmware/ti,j721e-dm-sci.txt
+++ b/doc/device-tree-bindings/firmware/ti,j721e-dm-sci.txt
@@ -24,7 +24,7 @@ Example:
 --------
 	dm_tifs: dm-tifs {
 		compatible = "ti,j721e-dm-sci";
-		ti,host-id = <250>;
+		ti,host-id = <3>;
 		ti,secure-host;
 		mbox-names = "rx", "tx";
 		mboxes= <&mcu_secproxy 21>,