ASoC: core: Add snd_soc_card_get_kcontrol()

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>

1 files changed, 16 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 0ec070cf7231..cef714effc1e 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