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| author | Lars-Peter Clausen <lars@metafoo.de> | 2014-03-18 12:02:10 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-03-19 17:07:30 +0400 |
| commit | 28d6d175d842b8dd6ac7fa10fa6e610b19fd9d86 (patch) | |
| tree | dcc974b63f8b6cb1a78b44c0497f60685c0af80c | |
| parent | 5c1d5f091dc39eecf9a34a8be01492d14c23ad91 (diff) | |
| download | linux-28d6d175d842b8dd6ac7fa10fa6e610b19fd9d86.tar.xz | |
ASoC: Add helper function to cast component back to CODEC
Add a helper function to cast back from a component struct to the CODEC struct
it is embedded in. This is useful in situations where we know that a certain
component is a CODEC and want to get access to some CODEC specific properties.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | include/sound/soc.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index 37b470c1e127..9ce6d20899b4 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1104,6 +1104,19 @@ struct soc_enum { const unsigned int *values; }; +/** + * snd_soc_component_to_codec() - Casts a component to the CODEC it is embedded in + * @component: The component to cast to a CODEC + * + * This function must only be used on components that are known to be CODECs. + * Otherwise the behavior is undefined. + */ +static inline struct snd_soc_codec *snd_soc_component_to_codec( + struct snd_soc_component *component) +{ + return container_of(component, struct snd_soc_codec, component); +} + /* codec IO */ unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg); unsigned int snd_soc_write(struct snd_soc_codec *codec, |