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ASoC: arizona: Add a notifier chain for CODEC events

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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>
This commit is contained in:
Charles Keepax
2016-05-13 16:45:18 +01:00
committed by Mark Brown
parent 1a695a905c
commit 2230c49f09
5 changed files with 57 additions and 0 deletions
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35
sound/soc/codecs/arizona.c
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@@ -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");