[alsa-devel] [PATCH 1/2] ASoC: core: Add snd_soc_card_get_kcontrol()
Dimitris Papastamos
dp at opensource.wolfsonmicro.com
Mon Jul 29 14:51:58 CEST 2013
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 at opensource.wolfsonmicro.com>
---
include/sound/soc.h | 2 ++
sound/soc/soc-core.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 6eabee7..b33d1de 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -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,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d82ee38..d68a486 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -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
--
1.8.3.4
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