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Diffstat (limited to 'arch/arm/mach-s3c64xx/include/mach/pll.h')
-rw-r--r--arch/arm/mach-s3c64xx/include/mach/pll.h35
1 files changed, 3 insertions, 32 deletions
diff --git a/arch/arm/mach-s3c64xx/include/mach/pll.h b/arch/arm/mach-s3c64xx/include/mach/pll.h
index 90bbd72fdc4..5ef0bb698ee 100644
--- a/arch/arm/mach-s3c64xx/include/mach/pll.h
+++ b/arch/arm/mach-s3c64xx/include/mach/pll.h
@@ -20,6 +20,7 @@
20#define S3C6400_PLL_SDIV_SHIFT (0) 20#define S3C6400_PLL_SDIV_SHIFT (0)
21 21
22#include <asm/div64.h> 22#include <asm/div64.h>
23#include <plat/pll6553x.h>
23 24
24static inline unsigned long s3c6400_get_pll(unsigned long baseclk, 25static inline unsigned long s3c6400_get_pll(unsigned long baseclk,
25 u32 pllcon) 26 u32 pllcon)
@@ -37,38 +38,8 @@ static inline unsigned long s3c6400_get_pll(unsigned long baseclk,
37 return (unsigned long)fvco; 38 return (unsigned long)fvco;
38} 39}
39 40
40#define S3C6400_EPLL_MDIV_MASK ((1 << (23-16)) - 1)
41#define S3C6400_EPLL_PDIV_MASK ((1 << (13-8)) - 1)
42#define S3C6400_EPLL_SDIV_MASK ((1 << (2-0)) - 1)
43#define S3C6400_EPLL_MDIV_SHIFT (16)
44#define S3C6400_EPLL_PDIV_SHIFT (8)
45#define S3C6400_EPLL_SDIV_SHIFT (0)
46#define S3C6400_EPLL_KDIV_MASK (0xffff)
47
48static inline unsigned long s3c6400_get_epll(unsigned long baseclk) 41static inline unsigned long s3c6400_get_epll(unsigned long baseclk)
49{ 42{
50 unsigned long result; 43 return s3c_get_pll6553x(baseclk, __raw_readl(S3C_EPLL_CON0),
51 u32 epll0 = __raw_readl(S3C_EPLL_CON0); 44 __raw_readl(S3C_EPLL_CON1));
52 u32 epll1 = __raw_readl(S3C_EPLL_CON1);
53 u32 mdiv, pdiv, sdiv, kdiv;
54 u64 tmp;
55
56 mdiv = (epll0 >> S3C6400_EPLL_MDIV_SHIFT) & S3C6400_EPLL_MDIV_MASK;
57 pdiv = (epll0 >> S3C6400_EPLL_PDIV_SHIFT) & S3C6400_EPLL_PDIV_MASK;
58 sdiv = (epll0 >> S3C6400_EPLL_SDIV_SHIFT) & S3C6400_EPLL_SDIV_MASK;
59 kdiv = epll1 & S3C6400_EPLL_KDIV_MASK;
60
61 /* We need to multiple baseclk by mdiv (the integer part) and kdiv
62 * which is in 2^16ths, so shift mdiv up (does not overflow) and
63 * add kdiv before multiplying. The use of tmp is to avoid any
64 * overflows before shifting bac down into result when multipling
65 * by the mdiv and kdiv pair.
66 */
67
68 tmp = baseclk;
69 tmp *= (mdiv << 16) + kdiv;
70 do_div(tmp, (pdiv << sdiv));
71 result = tmp >> 16;
72
73 return result;
74} 45}