ASoC: sgtl5000: Calculate Lineout Channel Output Level

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Currently LO_VOL_* stays at it's default (0x4 each) but this should be
calculated after setting VAG_VAL and LO_VAGCNTRL.
LO_VOL_* = 40 * log10(VAG_VAL / LO_VAGCNTRL) + 15

To avoid the log10 operation a table for all valid register values is
precalculated which contains the corresponding value
(VAG_VAL * 100 / LO_VAGCNTRL).

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Alexander Stein 2015-04-16 14:51:57 +02:00 • committed by Mark Brown

parent d2b7c2aaf7

commit 1f39d9397f

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sound/soc/codecs/sgtl5000.c

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