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Exynos5: clock: Update the equation to calculate PLL output frequency

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According to the latest exynos5 user manual, the equation for
calculating PLL output was changed to
FOUT= MDIV x FIN/(PDIV x 2^SDIV)
earlier it was
FOUT= MDIV x FIN/(PDIV x 2^(SDIV -1))
So updating the clock code accordingly.

Signed-off-by: Hatim Ali <hatim.rv@samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Akshay Saraswat 2013-03-22 02:26:36 +00:00 committed by Minkyu Kang
parent c7c4fe072e
commit 234370cab4
1 changed files with 2 additions and 4 deletions
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6
arch/arm/cpu/armv7/exynos/clock.c
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@ -116,10 +116,8 @@ static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
/* FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV) */
fout = (m + k / 1024) * (freq / (p * (1 << s)));
} else {
if (s < 1)
s = 1;
/* FOUT = MDIV * FIN / (PDIV * 2^(SDIV - 1)) */
fout = m * (freq / (p * (1 << (s - 1))));
/* FOUT = MDIV * FIN / (PDIV * 2^SDIV) */
fout = m * (freq / (p * (1 << s)));
}
return fout;