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Commit 24089e04 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Mark Brown
Browse files

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: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 15b8e94f

include/sound/soc.h

+27 −0
Original line number Diff line number Diff line
@@ -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,