From patchwork series 486905

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=486905

Author: Fox Snowpatch

arch/powerpc/boot/dts/mpc8313erdb.dts

@@ -308,13 +308,15 @@
 			reg = <0x500 0x100>;
 			interrupts = <90 8 78 8 84 8 72 8>;
 			interrupt-parent = <&ipic>;
+			clock-frequency = <0>; /* filled by bootloader */
 		};
 
 		timer@600 {
 			compatible = "fsl,mpc8313-gtm", "fsl,gtm";
 			reg = <0x600 0x100>;
 			interrupts = <91 8 79 8 85 8 73 8>;
 			interrupt-parent = <&ipic>;
+			clock-frequency = <0>; /* filled by bootloader */
 		};
 	};