ARM: S3C24XX: add get_rate for clk_h on S3C2416/2443

Currently the rate of clk_h is calculated once and set through the
s3c24xx_setup_clocks call. As the clk_h is a child of the prediv
we can evaluate its divider and calculate the rate in get_rate.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 22 insertions, 9 deletions

diff --git a/arch/arm/mach-s3c24xx/common-s3c2443.c b/arch/arm/mach-s3c24xx/common-s3c2443.c
index 274561677e5c..5e863bff5c7f 100644
--- a/arch/arm/mach-s3c24xx/common-s3c2443.c
+++ b/arch/arm/mach-s3c24xx/common-s3c2443.c
@@ -168,6 +168,25 @@ static struct clk clk_prediv = {
         },
 };
 
+/* hclk divider
+ *
+ * divides the prediv and provides the hclk.
+ */
+
+static unsigned long s3c2443_hclkdiv_getrate(struct clk *clk)
+{
+        unsigned long rate = clk_get_rate(clk->parent);
+        unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
+
+        clkdiv0 &= S3C2443_CLKDIV0_HCLKDIV_MASK;
+
+        return rate / (clkdiv0 + 1);
+}
+
+static struct clk_ops clk_h_ops = {
+        .get_rate       = s3c2443_hclkdiv_getrate,
+};
+
 /* armdiv
  *
  * this clock is sourced from msysclk and can have a number of
@@ -524,13 +543,6 @@ static struct clk hsmmc1_clk = {
         .ctrlbit        = S3C2443_HCLKCON_HSMMC,
 };
 
-static inline unsigned long s3c2443_get_hdiv(unsigned long clkcon0)
-{
-        clkcon0 &= S3C2443_CLKDIV0_HCLKDIV_MASK;
-
-        return clkcon0 + 1;
-}
-
 /* EPLLCON compatible enough to get on/off information */
 
 void __init_or_cpufreq s3c2443_common_setup_clocks(pll_fn get_mpll)
@@ -554,8 +566,7 @@ void __init_or_cpufreq s3c2443_common_setup_clocks(pll_fn get_mpll)
         clk_msysclk.clk.rate = pll;
 
         fclk = clk_get_rate(&clk_armdiv);
-        hclk = s3c2443_prediv_getrate(&clk_prediv);
-        hclk /= s3c2443_get_hdiv(clkdiv0);
+        hclk = clk_get_rate(&clk_h);
         pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
 
         s3c24xx_setup_clocks(fclk, hclk, pclk);
@@ -621,6 +632,8 @@ void __init s3c2443_common_init_clocks(int xtal, pll_fn get_mpll,
 
         /* s3c2443 parents h and p clocks from prediv */
         clk_h.parent = &clk_prediv;
+        clk_h.ops = &clk_h_ops;
+
         clk_p.parent = &clk_prediv;
 
         clk_usb_bus.parent = &clk_usb_bus_host.clk;