ARM: S5PV310: Add Clock and PLL support

This patch adds clock and pll support for S5PV310.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/arm/plat-s5p/include/plat/pll.h b/arch/arm/plat-s5p/include/plat/pll.h
index 7db322726bc2..4e8fe08cb70d 100644
--- a/arch/arm/plat-s5p/include/plat/pll.h
+++ b/arch/arm/plat-s5p/include/plat/pll.h
@@ -46,6 +46,47 @@ static inline unsigned long s5p_get_pll45xx(unsigned long baseclk, u32 pll_con,
         return (unsigned long)fvco;
 }
 
+#define PLL46XX_KDIV_MASK       (0xFFFF)
+#define PLL46XX_MDIV_MASK       (0x1FF)
+#define PLL46XX_PDIV_MASK       (0x3F)
+#define PLL46XX_SDIV_MASK       (0x7)
+#define PLL46XX_MDIV_SHIFT      (16)
+#define PLL46XX_PDIV_SHIFT      (8)
+#define PLL46XX_SDIV_SHIFT      (0)
+
+enum pll46xx_type_t {
+        pll_4600,
+        pll_4650,
+};
+
+static inline unsigned long s5p_get_pll46xx(unsigned long baseclk,
+                                            u32 pll_con0, u32 pll_con1,
+                                            enum pll46xx_type_t pll_type)
+{
+        unsigned long result;
+        u32 mdiv, pdiv, sdiv, kdiv;
+        u64 tmp;
+
+        mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
+        pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
+        sdiv = (pll_con0 >> PLL46XX_SDIV_SHIFT) & PLL46XX_SDIV_MASK;
+        kdiv = pll_con1 & PLL46XX_KDIV_MASK;
+
+        tmp = baseclk;
+
+        if (pll_type == pll_4600) {
+                tmp *= (mdiv << 16) + kdiv;
+                do_div(tmp, (pdiv << sdiv));
+                result = tmp >> 16;
+        } else {
+                tmp *= (mdiv << 10) + kdiv;
+                do_div(tmp, (pdiv << sdiv));
+                result = tmp >> 10;
+        }
+
+        return result;
+}
+
 #define PLL90XX_MDIV_MASK       (0xFF)
 #define PLL90XX_PDIV_MASK       (0x3F)
 #define PLL90XX_SDIV_MASK       (0x7)