[ARM] S3C24XX: Update clock data on resume

Update the clock settings on resume for suspend/resume
support so that if the boot loader changes anything or
the system's PLL is reset then we return with the correct
settings.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 25 insertions, 10 deletions

diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c
index f854e7385e3c..1df8429242b8 100644
--- a/arch/arm/mach-s3c2443/clock.c
+++ b/arch/arm/mach-s3c2443/clock.c
@@ -39,6 +39,8 @@
 
 #include <mach/regs-s3c2443-clock.h>
 
+#include <plat/cpu-freq.h>
+
 #include <plat/s3c2443.h>
 #include <plat/clock.h>
 #include <plat/cpu.h>
@@ -1011,22 +1013,20 @@ static struct clk *clks[] __initdata = {
         &clk_prediv,
 };
 
-void __init s3c2443_init_clocks(int xtal)
+void __init_or_cpufreq s3c2443_setup_clocks(void)
 {
-        unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
         unsigned long mpllcon = __raw_readl(S3C2443_MPLLCON);
         unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
+        struct clk *xtal_clk;
+        unsigned long xtal;
         unsigned long pll;
         unsigned long fclk;
         unsigned long hclk;
         unsigned long pclk;
-        struct clk *clkp;
-        int ret;
-        int ptr;
 
-        /* s3c2443 parents h and p clocks from prediv */
-        clk_h.parent = &clk_prediv;
-        clk_p.parent = &clk_prediv;
+        xtal_clk = clk_get(NULL, "xtal");
+        xtal = clk_get_rate(xtal_clk);
+        clk_put(xtal_clk);
 
         pll = s3c2443_get_mpll(mpllcon, xtal);
         clk_msysclk.rate = pll;
@@ -1036,13 +1036,29 @@ void __init s3c2443_init_clocks(int xtal)
         hclk /= s3c2443_get_hdiv(clkdiv0);
         pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
 
-        s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
+        s3c24xx_setup_clocks(fclk, hclk, pclk);
 
         printk("S3C2443: mpll %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n",
                (mpllcon & S3C2443_PLLCON_OFF) ? "off":"on",
                print_mhz(pll), print_mhz(fclk),
                print_mhz(hclk), print_mhz(pclk));
 
+        s3c24xx_setup_clocks(fclk, hclk, pclk);
+}
+
+void __init s3c2443_init_clocks(int xtal)
+{
+        struct clk *clkp;
+        unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
+        int ret;
+        int ptr;
+
+        /* s3c2443 parents h and p clocks from prediv */
+        clk_h.parent = &clk_prediv;
+        clk_p.parent = &clk_prediv;
+
+        s3c24xx_register_baseclocks(xtal);
+        s3c2443_setup_clocks();
         s3c2443_clk_initparents();
 
         for (ptr = 0; ptr < ARRAY_SIZE(clks); ptr++) {
@@ -1056,7 +1072,6 @@ void __init s3c2443_init_clocks(int xtal)
         }
 
         clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
-
         clk_usb_bus.parent = &clk_usb_bus_host;
 
         /* ensure usb bus clock is within correct rate of 48MHz */