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author | Lars-Peter Clausen <lars@metafoo.de> | 2014-05-18 14:24:12 +0200 |
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committer | Mark Brown <broonie@linaro.org> | 2014-06-01 19:16:47 +0100 |
commit | 24089e04cb1b4975bafd6368ab8b92082ebf6ad7 (patch) | |
tree | d42c4bae95d91a8ac41c7dd0a7903cc57887f8fb /include | |
parent | 15b8e94f7460a1285766555011a0feb68e618ecb (diff) | |
download | linux-stable-24089e04cb1b4975bafd6368ab8b92082ebf6ad7.tar.gz linux-stable-24089e04cb1b4975bafd6368ab8b92082ebf6ad7.tar.bz2 linux-stable-24089e04cb1b4975bafd6368ab8b92082ebf6ad7.zip |
ASoC: Add helper functions to cast from DAPM context to CODEC/platform
This is useful if we have a pointer to a DAPM context and know that it is a
CODEC or platform DAPM context and want to get a pointer to the CODEC or
platform.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/sound/soc.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index b9ee22018352..520b6684b04e 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1135,6 +1135,33 @@ static inline struct snd_soc_platform *snd_soc_component_to_platform( return container_of(component, struct snd_soc_platform, component); } +/** + * snd_soc_dapm_to_codec() - Casts a DAPM context to the CODEC it is embedded in + * @dapm: The DAPM context to cast to the CODEC + * + * This function must only be used on DAPM contexts that are known to be part of + * a CODEC (e.g. in a CODEC driver). Otherwise the behavior is undefined. + */ +static inline struct snd_soc_codec *snd_soc_dapm_to_codec( + struct snd_soc_dapm_context *dapm) +{ + return container_of(dapm, struct snd_soc_codec, dapm); +} + +/** + * snd_soc_dapm_to_platform() - Casts a DAPM context to the platform it is + * embedded in + * @dapm: The DAPM context to cast to the platform. + * + * This function must only be used on DAPM contexts that are known to be part of + * a platform (e.g. in a platform driver). Otherwise the behavior is undefined. + */ +static inline struct snd_soc_platform *snd_soc_dapm_to_platform( + struct snd_soc_dapm_context *dapm) +{ + return container_of(dapm, struct snd_soc_platform, dapm); +} + /* codec IO */ unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg); int snd_soc_write(struct snd_soc_codec *codec, unsigned int reg, |