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ASoC: core: Add snd_soc_card_get_kcontrol()

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This is useful for drivers who want to grab a pointer to
snd_kcontrol outside of the kcontrol callbacks.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Dimitris Papastamos 2013-07-29 13:51:58 +01:00 committed by Mark Brown
parent 3b2f64d00c
commit 4fefd69853
2 changed files with 18 additions and 0 deletions
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2
include/sound/soc.h
View File

@ -475,6 +475,8 @@ int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops);
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
void *data, const char *long_name,
const char *prefix);
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
const char *name);
int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
const struct snd_kcontrol_new *controls, int num_controls);
int snd_soc_add_platform_controls(struct snd_soc_platform *platform,

16
sound/soc/soc-core.c
View File

@ -2299,6 +2299,22 @@ static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
return 0;
}
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
const char *name)
{
struct snd_card *card = soc_card->snd_card;
struct snd_kcontrol *kctl;
if (unlikely(!name))
return NULL;
list_for_each_entry(kctl, &card->controls, list)
if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
return kctl;
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
/**
* snd_soc_add_codec_controls - add an array of controls to a codec.
* Convenience function to add a list of controls. Many codecs were