From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Date: Wed, 9 Jul 2014 16:41:45 +0000 (+0100)
Subject: ASoC: arizona: Correct relationship between VCO corner and Fref
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=35a730a0790b2a6535e0b4a964c6a8b2d27fa019;p=linux-beck.git

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>
---

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 4c4727f0837c..6084af76f337 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -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)) {