diff --git a/include/asm-arm/plat-s3c/regs-timer.h b/include/asm-arm/plat-s3c/regs-timer.h
index 8b0d594397b17500e42d03f7579f52cf75b0a38f..b5bc692f3489d1020357a75d92ed7797ca001024 100644
--- a/include/asm-arm/plat-s3c/regs-timer.h
+++ b/include/asm-arm/plat-s3c/regs-timer.h
@@ -65,6 +65,15 @@
 #define S3C2410_TCFG1_MUX0_TCLK0  (4<<0)
 #define S3C2410_TCFG1_MUX0_MASK	  (15<<0)
 
+#define S3C2410_TCFG1_MUX_DIV2	  (0<<0)
+#define S3C2410_TCFG1_MUX_DIV4	  (1<<0)
+#define S3C2410_TCFG1_MUX_DIV8	  (2<<0)
+#define S3C2410_TCFG1_MUX_DIV16   (3<<0)
+#define S3C2410_TCFG1_MUX_TCLK    (4<<0)
+#define S3C2410_TCFG1_MUX_MASK	  (15<<0)
+
+#define S3C2410_TCFG1_SHIFT(x)	  ((x) * 4)
+
 /* for each timer, we have an count buffer, an compare buffer and
  * an observation buffer
 */