From 24089e04cb1b4975bafd6368ab8b92082ebf6ad7 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Sun, 18 May 2014 14:24:12 +0200 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- include/sound/soc.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/include/sound/soc.h b/include/sound/soc.h index b9ee220..520b668 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, -- 2.7.4