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arm: allwinner: clk: Fix nm_recalc

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When comparing best frequencies use the absolute value.
If we do not do that we end up choosing an always lower value than
the best one if the exact freq cannot be met.

MFC after:	2 weeks
This commit is contained in:
Emmanuel Vadot 2019-03-29 19:40:04 +00:00
parent 0eb97cca9f
commit 34f71e304e
1 changed files with 1 additions and 1 deletions
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2
sys/arm/allwinner/clkng/aw_clk_nm.c
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@ -155,7 +155,7 @@ aw_clk_nm_find_best(struct aw_clk_nm_sc *sc, uint64_t fparent, uint64_t *fout,
for (m = min_m; m <= max_m; ) {
for (n = min_m; n <= max_n; ) {
cur = fparent / n / m;
if ((*fout - cur) < (*fout - best)) {
if (abs(*fout - cur) < abs(*fout - best)) {
best = cur;
*factor_n = n;
*factor_m = m;