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clk: imx: Use div64_ul instead of do_div

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do_div() does a 64-by-32 division. Here the divisor is an unsigned long
which on some platforms is 64 bit wide. So use div64_ul instead of do_div
to avoid a possible truncation.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/20211118080634.165275-1-deng.changcheng@zte.com.cn
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
This commit is contained in:
Changcheng Deng 2021-11-18 08:06:34 +00:00 committed by Abel Vesa
parent b5e29cf761
commit c1b6ad9a90
1 changed files with 3 additions and 3 deletions
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6
drivers/clk/imx/clk-pllv3.c
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@ -247,7 +247,7 @@ static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
div = rate / parent_rate;
temp64 = (u64) (rate - div * parent_rate);
temp64 *= mfd;
do_div(temp64, parent_rate);
temp64 = div64_ul(temp64, parent_rate);
mfn = temp64;
temp64 = (u64)parent_rate;
@ -277,7 +277,7 @@ static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
div = rate / parent_rate;
temp64 = (u64) (rate - div * parent_rate);
temp64 *= mfd;
do_div(temp64, parent_rate);
temp64 = div64_ul(temp64, parent_rate);
mfn = temp64;
val = readl_relaxed(pll->base);
@ -334,7 +334,7 @@ static struct clk_pllv3_vf610_mf clk_pllv3_vf610_rate_to_mf(
/* rate = parent_rate * (mfi + mfn/mfd) */
temp64 = rate - parent_rate * mf.mfi;
temp64 *= mf.mfd;
do_div(temp64, parent_rate);
temp64 = div64_ul(temp64, parent_rate);
mf.mfn = temp64;
}