ARM: S3C64XX: Add support for synchronous clock operation

[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-s3c64xx / clock.c

diff --git a/arch/arm/mach-s3c64xx/clock.c b/arch/arm/mach-s3c64xx/clock.c
index 8cf39e33579e3bb9c7d30eceb6afcaa5914e6d2c..872e68361eb44d8f289c963e0cf0456d01dc7822 100644 (file)
--- 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);