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ASoC: arizona: Correct relationship between VCO corner and Fref 

When configuring the FLL we must ensure that the reference clock passed
to the FLL is under a certain limit. This limit was specified
incorrectly in the current code, this patch corrects this. Although the
error will only be encountered in some edge cases.

Reported-by: Ryo Tsutsui <ryo.tsutsui@wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Charles Keepax 2014-07-09 17:41:45 +01:00 committed by Mark Brown
parent 29fee82940
commit 35a730a079
1 changed files with 2 additions and 2 deletions
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4
sound/soc/codecs/arizona.c
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@ -1578,8 +1578,8 @@ static int arizona_calc_fratio(struct arizona_fll *fll,
while (div <= ARIZONA_FLL_MAX_REFDIV) {
for (ratio = init_ratio; ratio <= ARIZONA_FLL_MAX_FRATIO;
ratio++) {
if (ARIZONA_FLL_VCO_CORNER / (fll->vco_mult * ratio) <
Fref)
if ((ARIZONA_FLL_VCO_CORNER / 2) /
(fll->vco_mult * ratio) < Fref)
break;
if (target % (ratio * Fref)) {