diff --git a/arch/powerpc/boot/dts/adder875-redboot.dts b/arch/powerpc/boot/dts/adder875-redboot.dts
index 930bfb3894ebbf862966ea8629e583e89d0e15e3..28e9cd3d7a216c841ee8b8c6bd119b6194bed2cb 100644
--- a/arch/powerpc/boot/dts/adder875-redboot.dts
+++ b/arch/powerpc/boot/dts/adder875-redboot.dts
@@ -151,6 +151,7 @@
 				compatible = "fsl,mpc875-brg",
 				             "fsl,cpm1-brg",
 				             "fsl,cpm-brg";
+				clock-frequency = <50000000>;
 				reg = <0x9f0 0x10>;
 			};
 
diff --git a/arch/powerpc/boot/dts/adder875-uboot.dts b/arch/powerpc/boot/dts/adder875-uboot.dts
index 0197242dacfb08945d2eb1ccb77520f819635434..54fb60ec03e540c06a37556f4535aa19c13ce959 100644
--- a/arch/powerpc/boot/dts/adder875-uboot.dts
+++ b/arch/powerpc/boot/dts/adder875-uboot.dts
@@ -150,6 +150,7 @@
 				compatible = "fsl,mpc875-brg",
 				             "fsl,cpm1-brg",
 				             "fsl,cpm-brg";
+				clock-frequency = <50000000>;
 				reg = <0x9f0 0x10>;
 			};
 
diff --git a/arch/powerpc/boot/dts/mpc885ads.dts b/arch/powerpc/boot/dts/mpc885ads.dts
index 8848e637293e64244cf629ce11220202569dd997..d84a012c2aaf10340daa1d6c9c24d67070b0a21c 100644
--- a/arch/powerpc/boot/dts/mpc885ads.dts
+++ b/arch/powerpc/boot/dts/mpc885ads.dts
@@ -166,6 +166,7 @@
 				compatible = "fsl,mpc885-brg",
 				             "fsl,cpm1-brg",
 				             "fsl,cpm-brg";
+				clock-frequency = <0>;
 				reg = <9f0 10>;
 			};