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ASoC: arizona: Add 32uS delay after putting FLL into freerun

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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@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax
2015-11-30 17:37:28 +00:00
committed by Mark Brown
parent d190106d5a
commit 800f297e8e
1 changed files with 3 additions and 3 deletions
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6
sound/soc/codecs/arizona.c
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@@ -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);
}
/*