diff --git a/arch/powerpc/boot/dts/mpc8377_rdb.dts b/arch/powerpc/boot/dts/mpc8377_rdb.dts
index e747486f477cd43eba56ff52f78283176a930b3d..54b452063ea9694361513c15b9637f4f82e69957 100644
--- a/arch/powerpc/boot/dts/mpc8377_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc8377_rdb.dts
@@ -137,6 +137,11 @@
 			interrupt-parent = <&ipic>;
 			dfsrr;
 
+			dtt@48 {
+				compatible = "national,lm75";
+				reg = <0x48>;
+			};
+
 			at24@50 {
 				compatible = "at24,24c256";
 				reg = <0x50>;
diff --git a/arch/powerpc/boot/dts/mpc8378_rdb.dts b/arch/powerpc/boot/dts/mpc8378_rdb.dts
index f4c86822bd302b8dc46ffdebc1db991bba69935b..7243374f50210db39af42ea59f4b1bdd1b0707e7 100644
--- a/arch/powerpc/boot/dts/mpc8378_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc8378_rdb.dts
@@ -137,6 +137,11 @@
 			interrupt-parent = <&ipic>;
 			dfsrr;
 
+			dtt@48 {
+				compatible = "national,lm75";
+				reg = <0x48>;
+			};
+
 			at24@50 {
 				compatible = "at24,24c256";
 				reg = <0x50>;
diff --git a/arch/powerpc/boot/dts/mpc8379_rdb.dts b/arch/powerpc/boot/dts/mpc8379_rdb.dts
index 1985cef32db5d7f486936399793c976018027f75..6dac476a415f49d3c911195053f8511fd008cc66 100644
--- a/arch/powerpc/boot/dts/mpc8379_rdb.dts
+++ b/arch/powerpc/boot/dts/mpc8379_rdb.dts
@@ -135,6 +135,11 @@
 			interrupt-parent = <&ipic>;
 			dfsrr;
 
+			dtt@48 {
+				compatible = "national,lm75";
+				reg = <0x48>;
+			};
+
 			at24@50 {
 				compatible = "at24,24c256";
 				reg = <0x50>;