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| author | Ben Dooks <ben-linux@fluff.org> | 2010-05-19 18:04:11 +0900 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2010-05-19 18:04:11 +0900 |
| commit | 32457942b90aabb9242b450f02d18d9c8d982916 (patch) | |
| tree | 6472b77016f83f2ada7a7e2ca83a9803f313f1a8 /arch/arm/plat-s3c24xx/include/plat/pll.h | |
| parent | 6071399674e813d797d9f458ec8913b86c85398e (diff) | |
| parent | f64bea4318a73e833d0a9b8400cc0f6cee957da3 (diff) | |
ARM: Merge for-2635/fb-updates1
Merge branch 'for-2635/fb-updates1' into for-linus/samsung2
Diffstat (limited to 'arch/arm/plat-s3c24xx/include/plat/pll.h')
| -rw-r--r-- | arch/arm/plat-s3c24xx/include/plat/pll.h | 25 |
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 7ea8bffa7a9c..005729a1077a 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) return (unsigned int)fvco; } + +#define S3C2416_PLL_M_SHIFT (14) +#define S3C2416_PLL_P_SHIFT (5) +#define S3C2416_PLL_S_MASK (7) +#define S3C2416_PLL_M_MASK ((1 << 10) - 1) +#define S3C2416_PLL_P_MASK (63) + +static inline unsigned int +s3c2416_get_pll(unsigned int pllval, unsigned int baseclk) +{ + unsigned int m, p, s; + uint64_t fvco; + + m = pllval >> S3C2416_PLL_M_SHIFT; + p = pllval >> S3C2416_PLL_P_SHIFT; + + s = pllval & S3C2416_PLL_S_MASK; + m &= S3C2416_PLL_M_MASK; + p &= S3C2416_PLL_P_MASK; + + fvco = (uint64_t)baseclk * m; + do_div(fvco, (p << s)); + + return (unsigned int)fvco; +} |