commit 1cbe4bcae342973e36447aa03a609bc25804f416
author Mark Brown <broonie@opensource.wolfsonmicro.com> Wed Nov 21 14:12:22 2012 +0900
committer Mark Brown <broonie@opensource.wolfsonmicro.com> Tue Nov 27 19:30:56 2012 +0000
tree 465f179f0078f3c69b1b1b61987db0fe696b9779
parent ba6b047ab9af433fb53939032858b196d05e6a18

ASoC: arizona: Suppress noop FLL updates

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/arizona.c

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 500e6cb..d497643 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -937,6 +937,9 @@
 	bool ena;
 	int ret;
 
+	if (fll->fref == Fref && fll->fout == Fout)
+		return 0;
+
 	ret = regmap_read(arizona->regmap, fll->base + 1, &reg);
 	if (ret != 0) {
 		arizona_fll_err(fll, "Failed to read current state: %d\n",
@@ -1014,6 +1017,9 @@
 	if (ret == 0)
 		arizona_fll_warn(fll, "Timed out waiting for lock\n");
 
+	fll->fref = Fref;
+	fll->fout = Fout;
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(arizona_set_fll);