[alsa-devel] [PATCH] ASoC: arizona: Add 32uS delay after putting FLL into freerun

[Charles Keepax]

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 <ckeepax at opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index e76ecc7..8cd448c 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -2215,6 +2215,7 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 		regmap_update_bits_async(fll->arizona->regmap, fll->base + 1,
 					 ARIZONA_FLL1_FREERUN,
 					 ARIZONA_FLL1_FREERUN);
+		udelay(32);
 	}
 
 	/*
-- 
1.7.2.5