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>

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 6eabee7ec15a90197ff3024f827d47cfaad91095..b33d1de463968613755877bfb2387db2bf824c28 100644 (file)
--- 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 0ec070cf7231ebcc39a057061af8995d7f7574ff..cef714effc1e31edcc6db312560071b7fe7ff5c8 100644 (file)
--- 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