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clk: atlas7: fix pll missed divide NR in fraction mode 

PLL VCO frequency is given by Fvco = Fref * 2 * NF / NR
in integer-N mode, or by Fvco = Fref * SSN / NR in Spread
Spectrum (fractional-N) mode. Thus fix the missing part
of NR

Signed-off-by: Guo Zeng <guo.zeng@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
hifive-unleashed-5.1
Guo Zeng 2015-08-04 14:45:32 +00:00 committed by Michael Turquette
parent cf8709eabc
commit b32a7cc63b
1 changed files with 1 additions and 0 deletions
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drivers/clk/sirf/clk-atlas7.c
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@ -358,6 +358,7 @@ static unsigned long pll_clk_recalc_rate(struct clk_hw *hw,
if (regctrl0 & SIRFSOC_ABPLL_CTRL0_SSEN) {
rate = fin;
rate *= 1 << 24;
do_div(rate, nr);
do_div(rate, (256 * ((ssdiv >> ssdepth) << ssdepth)
+ (ssmod << ssdepth)));
} else {