ARM: SAMSUNG: Move S3C6400 PLL code to <plat/pll.h> for re-use

The S3C6400 EPLL code matches the S3C2416 and compatible SoCs, so move
it from mach-s3c64xx into <plat/pll.h> for easy reuse.

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

2 files changed, 54 insertions, 32 deletions

diff --git a/arch/arm/mach-s3c64xx/include/mach/pll.h b/arch/arm/mach-s3c64xx/include/mach/pll.h
index 90bbd72fdc4e..5ef0bb698ee0 100644
--- a/arch/arm/mach-s3c64xx/include/mach/pll.h
+++ b/arch/arm/mach-s3c64xx/include/mach/pll.h
@@ -20,6 +20,7 @@
 #define S3C6400_PLL_SDIV_SHIFT  (0)
 
 #include <asm/div64.h>
+#include <plat/pll6553x.h>
 
 static inline unsigned long s3c6400_get_pll(unsigned long baseclk,
                                             u32 pllcon)
@@ -37,38 +38,8 @@ static inline unsigned long s3c6400_get_pll(unsigned long baseclk,
         return (unsigned long)fvco;
 }
 
-#define S3C6400_EPLL_MDIV_MASK  ((1 << (23-16)) - 1)
-#define S3C6400_EPLL_PDIV_MASK  ((1 << (13-8)) - 1)
-#define S3C6400_EPLL_SDIV_MASK  ((1 << (2-0)) - 1)
-#define S3C6400_EPLL_MDIV_SHIFT (16)
-#define S3C6400_EPLL_PDIV_SHIFT (8)
-#define S3C6400_EPLL_SDIV_SHIFT (0)
-#define S3C6400_EPLL_KDIV_MASK  (0xffff)
-
 static inline unsigned long s3c6400_get_epll(unsigned long baseclk)
 {
-        unsigned long result;
-        u32 epll0 = __raw_readl(S3C_EPLL_CON0);
-        u32 epll1 = __raw_readl(S3C_EPLL_CON1);
-        u32 mdiv, pdiv, sdiv, kdiv;
-        u64 tmp;
-
-        mdiv = (epll0 >> S3C6400_EPLL_MDIV_SHIFT) & S3C6400_EPLL_MDIV_MASK;
-        pdiv = (epll0 >> S3C6400_EPLL_PDIV_SHIFT) & S3C6400_EPLL_PDIV_MASK;
-        sdiv = (epll0 >> S3C6400_EPLL_SDIV_SHIFT) & S3C6400_EPLL_SDIV_MASK;
-        kdiv = epll1 & S3C6400_EPLL_KDIV_MASK;
-
-        /* We need to multiple baseclk by mdiv (the integer part) and kdiv
-         * which is in 2^16ths, so shift mdiv up (does not overflow) and
-         * add kdiv before multiplying. The use of tmp is to avoid any
-         * overflows before shifting bac down into result when multipling
-         * by the mdiv and kdiv pair.
-         */
-
-        tmp = baseclk;
-        tmp *= (mdiv << 16) + kdiv;
-        do_div(tmp, (pdiv << sdiv));
-        result = tmp >> 16;
-
-        return result;
+        return s3c_get_pll6553x(baseclk, __raw_readl(S3C_EPLL_CON0),
+                                __raw_readl(S3C_EPLL_CON1));
 }
diff --git a/arch/arm/plat-samsung/include/plat/pll6553x.h b/arch/arm/plat-samsung/include/plat/pll6553x.h
new file mode 100644
index 000000000000..b8b7e1d884f8
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/pll6553x.h
@@ -0,0 +1,51 @@
+/* arch/arm/plat-samsung/include/plat/pll6553x.h
+ *      partially from arch/arm/mach-s3c64xx/include/mach/pll.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * Samsung PLL6553x PLL code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/* S3C6400 and compatible (S3C2416, etc.) EPLL code */
+
+#define PLL6553X_MDIV_MASK      ((1 << (23-16)) - 1)
+#define PLL6553X_PDIV_MASK      ((1 << (13-8)) - 1)
+#define PLL6553X_SDIV_MASK      ((1 << (2-0)) - 1)
+#define PLL6553X_MDIV_SHIFT     (16)
+#define PLL6553X_PDIV_SHIFT     (8)
+#define PLL6553X_SDIV_SHIFT     (0)
+#define PLL6553X_KDIV_MASK      (0xffff)
+
+static inline unsigned long s3c_get_pll6553x(unsigned long baseclk,
+                                             u32 pll0, u32 pll1)
+{
+        unsigned long result;
+        u32 mdiv, pdiv, sdiv, kdiv;
+        u64 tmp;
+
+        mdiv = (pll0 >> PLL6553X_MDIV_SHIFT) & PLL6553X_MDIV_MASK;
+        pdiv = (pll0 >> PLL6553X_PDIV_SHIFT) & PLL6553X_PDIV_MASK;
+        sdiv = (pll0 >> PLL6553X_SDIV_SHIFT) & PLL6553X_SDIV_MASK;
+        kdiv = pll1 & PLL6553X_KDIV_MASK;
+
+        /* We need to multiple baseclk by mdiv (the integer part) and kdiv
+         * which is in 2^16ths, so shift mdiv up (does not overflow) and
+         * add kdiv before multiplying. The use of tmp is to avoid any
+         * overflows before shifting bac down into result when multipling
+         * by the mdiv and kdiv pair.
+         */
+
+        tmp = baseclk;
+        tmp *= (mdiv << 16) + kdiv;
+        do_div(tmp, (pdiv << sdiv));
+        result = tmp >> 16;
+
+        return result;
+}