diff --git a/include/asm-arm/arch-s3c2410/regs-clock.h b/include/asm-arm/arch-s3c2410/regs-clock.h
index e39656b7a086..dba9df9d8713 100644
--- a/include/asm-arm/arch-s3c2410/regs-clock.h
+++ b/include/asm-arm/arch-s3c2410/regs-clock.h
@@ -138,6 +138,8 @@ s3c2410_get_pll(unsigned int pllval, unsigned int baseclk)
 #define S3C2412_CLKDIVN_PDIVN		(1<<2)
 #define S3C2412_CLKDIVN_HDIVN_MASK	(3<<0)
 #define S3C2421_CLKDIVN_ARMDIVN		(1<<3)
+#define S3C2412_CLKDIVN_DVSEN		(1<<4)
+#define S3C2412_CLKDIVN_HALFHCLK	(1<<5)
 #define S3C2412_CLKDIVN_USB48DIV	(1<<6)
 #define S3C2412_CLKDIVN_UARTDIV_MASK	(15<<8)
 #define S3C2412_CLKDIVN_UARTDIV_SHIFT	(8)