diff options
author | Markus Pargmann <mpa@pengutronix.de> | 2014-01-16 16:02:10 +0100 |
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committer | Mark Brown <broonie@linaro.org> | 2014-02-03 12:44:50 +0000 |
commit | f227b88f0fce5f9b82aa934f8829a741c2e06d82 (patch) | |
tree | 79d3aa04bf8075f5611ff1ee30ad9238a5c0d4f8 /include/sound/soc.h | |
parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
download | op-kernel-dev-f227b88f0fce5f9b82aa934f8829a741c2e06d82.zip op-kernel-dev-f227b88f0fce5f9b82aa934f8829a741c2e06d82.tar.gz |
ASoC: core: Add signed register volume control logic
Some codecs use signed volume control representation with non standard
register sizes, e.g. 6 or 7 bit signed integers.
This patch adds generic signed register volume control logic to
soc-core. Instead of a fixed width signed register control, this
implementation uses a 'min' value and the signed bit location to translate
it to an absolute volume. Using the 'sign_bit' we can calculate a
correct mask for the register values and translate it back into signed
integers of standard size.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/sound/soc.h')
-rw-r--r-- | include/sound/soc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index 9a00147..a25f3cc 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1067,6 +1067,7 @@ struct soc_mixer_control { int min, max, platform_max; int reg, rreg; unsigned int shift, rshift; + unsigned int sign_bit; unsigned int invert:1; unsigned int autodisable:1; }; |