From 800f297e8ef91901b93c280425863684dff2d9c6 Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Mon, 30 Nov 2015 17:37:28 +0000 Subject: [PATCH] ASoC: arizona: Add 32uS delay after putting FLL into freerun When switching between two clock sources using the FLL freerun to smooth the transition we should wait 32uS after putting the FLL into freerun before we proceed. In practice we appear to be getting enough delay from the surrounding code, but better to make it explicit. Signed-off-by: Charles Keepax Signed-off-by: Mark Brown --- sound/soc/codecs/arizona.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c index e76ecc7..a23f7d1 100644 --- a/sound/soc/codecs/arizona.c +++ b/sound/soc/codecs/arizona.c @@ -2212,9 +2212,9 @@ static int arizona_enable_fll(struct arizona_fll *fll) /* Facilitate smooth refclk across the transition */ regmap_update_bits_async(fll->arizona->regmap, fll->base + 0x9, ARIZONA_FLL1_GAIN_MASK, 0); - regmap_update_bits_async(fll->arizona->regmap, fll->base + 1, - ARIZONA_FLL1_FREERUN, - ARIZONA_FLL1_FREERUN); + regmap_update_bits(fll->arizona->regmap, fll->base + 1, + ARIZONA_FLL1_FREERUN, ARIZONA_FLL1_FREERUN); + udelay(32); } /* -- 2.7.4