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Diffstat (limited to 'arch/arm/plat-s3c24xx/include/plat/pll.h')
-rw-r--r--arch/arm/plat-s3c24xx/include/plat/pll.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/include/plat/pll.h b/arch/arm/plat-s3c24xx/include/plat/pll.h
index 7ea8bffa7a9..005729a1077 100644
--- a/arch/arm/plat-s3c24xx/include/plat/pll.h
+++ b/arch/arm/plat-s3c24xx/include/plat/pll.h
@@ -35,3 +35,28 @@ s3c24xx_get_pll(unsigned int pllval, unsigned int baseclk)
35 35
36 return (unsigned int)fvco; 36 return (unsigned int)fvco;
37} 37}
38
39#define S3C2416_PLL_M_SHIFT (14)
40#define S3C2416_PLL_P_SHIFT (5)
41#define S3C2416_PLL_S_MASK (7)
42#define S3C2416_PLL_M_MASK ((1 << 10) - 1)
43#define S3C2416_PLL_P_MASK (63)
44
45static inline unsigned int
46s3c2416_get_pll(unsigned int pllval, unsigned int baseclk)
47{
48 unsigned int m, p, s;
49 uint64_t fvco;
50
51 m = pllval >> S3C2416_PLL_M_SHIFT;
52 p = pllval >> S3C2416_PLL_P_SHIFT;
53
54 s = pllval & S3C2416_PLL_S_MASK;
55 m &= S3C2416_PLL_M_MASK;
56 p &= S3C2416_PLL_P_MASK;
57
58 fvco = (uint64_t)baseclk * m;
59 do_div(fvco, (p << s));
60
61 return (unsigned int)fvco;
62}