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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2016-05-13 18:45:18 +0300
committerMark Brown <broonie@kernel.org>2016-05-30 18:14:36 +0300
commit2230c49f09b552454eac51b81e9e4e41060b5e70 (patch)
tree3bc1af20fcf6cb5b3fc8c98f28cce333a6dc6dc5 /sound/soc/codecs/arizona.c
parent1a695a905c18548062509178b98bc91e67510864 (diff)
downloadlinux-2230c49f09b552454eac51b81e9e4e41060b5e70.tar.xz
ASoC: arizona: Add a notifier chain for CODEC events
Add a notifier chain that can be used from the machine driver to catch events generated by the CODEC. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/arizona.c')
-rw-r--r--sound/soc/codecs/arizona.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 664a8c044ffb..7f9ab92ffa91 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -324,6 +324,17 @@ int arizona_init_gpio(struct snd_soc_codec *codec)
}
EXPORT_SYMBOL_GPL(arizona_init_gpio);
+int arizona_init_notifiers(struct snd_soc_codec *codec)
+{
+ struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+ struct arizona *arizona = priv->arizona;
+
+ BLOCKING_INIT_NOTIFIER_HEAD(&arizona->notifier);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(arizona_init_notifiers);
+
const char * const arizona_mixer_texts[ARIZONA_NUM_MIXER_INPUTS] = {
"None",
"Tone Generator 1",
@@ -2573,6 +2584,30 @@ int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol,
}
EXPORT_SYMBOL_GPL(arizona_lhpf_coeff_put);
+int arizona_register_notifier(struct snd_soc_codec *codec,
+ struct notifier_block *nb,
+ int (*notify)(struct notifier_block *nb,
+ unsigned long action, void *data))
+{
+ struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+ struct arizona *arizona = priv->arizona;
+
+ nb->notifier_call = notify;
+
+ return blocking_notifier_chain_register(&arizona->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(arizona_register_notifier);
+
+int arizona_unregister_notifier(struct snd_soc_codec *codec,
+ struct notifier_block *nb)
+{
+ struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+ struct arizona *arizona = priv->arizona;
+
+ return blocking_notifier_chain_unregister(&arizona->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(arizona_unregister_notifier);
+
MODULE_DESCRIPTION("ASoC Wolfson Arizona class device support");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");