2 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c64xx/clock.c b/arch/arm/mach-s3c64xx/clock.c
index 8cf39e33579e..872e68361eb4 100644
--- a/arch/arm/mach-s3c64xx/clock.c
+++ b/arch/arm/mach-s3c64xx/clock.c
@@ -744,7 +744,13 @@ void __init_or_cpufreq s3c6400_setup_clocks(void)
         printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n",
                apll, mpll, epll);
 
-        hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
+        if(__raw_readl(S3C64XX_OTHERS) & S3C64XX_OTHERS_SYNCMUXSEL)
+                /* Synchronous mode */
+                hclk2 = apll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
+        else
+                /* Asynchronous mode */
+                hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
+
         hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK);
         pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK);
 
diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h b/arch/arm/mach-s3c64xx/include/mach/regs-sys.h
index 774e0de31400..b91e02093289 100644
--- a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h
+++ b/arch/arm/mach-s3c64xx/include/mach/regs-sys.h
@@ -26,5 +26,6 @@
 #define S3C64XX_OTHERS          S3C_SYSREG(0x900)
 
 #define S3C64XX_OTHERS_USBMASK  (1 << 16)
+#define S3C64XX_OTHERS_SYNCMUXSEL       (1 << 6)
 
 #endif /* _PLAT_REGS_SYS_H */