ARM: S5P: Reduce duplicated EPLL control codes

S5P Samsung SoCs has a EPLL to support various PLL clock sources for other
H/W blocks. Until now, to control EPLL, each of SoCs make their own functions
in 'mach-s5pxxx/clock.c'. But some of functions, 'xxx_epll_get_rate()' and
'xxx_epll_enable()', are exactly same in all S5P SoCs, so this patch move
these duplicated codes to common EPLL functions that use platform wide.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/plat-s5p/clock.c b/arch/arm/plat-s5p/clock.c
index 818800962694..8d081d968c58 100644
--- a/arch/arm/plat-s5p/clock.c
+++ b/arch/arm/plat-s5p/clock.c
@@ -21,6 +21,8 @@
 #include <linux/io.h>
 #include <asm/div64.h>
 
+#include <mach/regs-clock.h>
+
 #include <plat/clock.h>
 #include <plat/clock-clksrc.h>
 #include <plat/s5p-clock.h>
@@ -148,6 +150,24 @@ int s5p_gatectrl(void __iomem *reg, struct clk *clk, int enable)
         return 0;
 }
 
+int s5p_epll_enable(struct clk *clk, int enable)
+{
+        unsigned int ctrlbit = clk->ctrlbit;
+        unsigned int epll_con = __raw_readl(S5P_EPLL_CON) & ~ctrlbit;
+
+        if (enable)
+                __raw_writel(epll_con | ctrlbit, S5P_EPLL_CON);
+        else
+                __raw_writel(epll_con, S5P_EPLL_CON);
+
+        return 0;
+}
+
+unsigned long s5p_epll_get_rate(struct clk *clk)
+{
+        return clk->rate;
+}
+
 static struct clk *s5p_clks[] __initdata = {
         &clk_ext_xtal_mux,
         &clk_48m,
diff --git a/arch/arm/plat-s5p/include/plat/s5p-clock.h b/arch/arm/plat-s5p/include/plat/s5p-clock.h
index 17036c898409..2b6dcff8ab2b 100644
--- a/arch/arm/plat-s5p/include/plat/s5p-clock.h
+++ b/arch/arm/plat-s5p/include/plat/s5p-clock.h
@@ -43,4 +43,8 @@ extern struct clksrc_sources clk_src_dpll;
 
 extern int s5p_gatectrl(void __iomem *reg, struct clk *clk, int enable);
 
+/* Common EPLL operations for S5P platform */
+extern int s5p_epll_enable(struct clk *clk, int enable);
+extern unsigned long s5p_epll_get_rate(struct clk *clk);
+
 #endif /* __ASM_PLAT_S5P_CLOCK_H */