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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>
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5 changed files with 57 additions and 0 deletions
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@ -14,6 +14,7 @@
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#define _WM_ARIZONA_CORE_H
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#include <linux/interrupt.h>
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#include <linux/notifier.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/mfd/arizona/pdata.h>
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@ -148,8 +149,17 @@ struct arizona {
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uint16_t dac_comp_coeff;
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uint8_t dac_comp_enabled;
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struct mutex dac_comp_lock;
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struct blocking_notifier_head notifier;
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};
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static inline int arizona_call_notifiers(struct arizona *arizona,
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unsigned long event,
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void *data)
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{
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return blocking_notifier_call_chain(&arizona->notifier, event, data);
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}
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int arizona_clk32k_enable(struct arizona *arizona);
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int arizona_clk32k_disable(struct arizona *arizona);
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@ -324,6 +324,17 @@ int arizona_init_gpio(struct snd_soc_codec *codec)
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}
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EXPORT_SYMBOL_GPL(arizona_init_gpio);
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int arizona_init_notifiers(struct snd_soc_codec *codec)
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{
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struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
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struct arizona *arizona = priv->arizona;
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BLOCKING_INIT_NOTIFIER_HEAD(&arizona->notifier);
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return 0;
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}
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EXPORT_SYMBOL_GPL(arizona_init_notifiers);
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const char * const arizona_mixer_texts[ARIZONA_NUM_MIXER_INPUTS] = {
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"None",
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"Tone Generator 1",
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@ -2573,6 +2584,30 @@ int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol,
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}
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EXPORT_SYMBOL_GPL(arizona_lhpf_coeff_put);
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int arizona_register_notifier(struct snd_soc_codec *codec,
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struct notifier_block *nb,
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int (*notify)(struct notifier_block *nb,
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unsigned long action, void *data))
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{
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struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
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struct arizona *arizona = priv->arizona;
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nb->notifier_call = notify;
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return blocking_notifier_chain_register(&arizona->notifier, nb);
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}
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EXPORT_SYMBOL_GPL(arizona_register_notifier);
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int arizona_unregister_notifier(struct snd_soc_codec *codec,
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struct notifier_block *nb)
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{
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struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
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struct arizona *arizona = priv->arizona;
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return blocking_notifier_chain_unregister(&arizona->notifier, nb);
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}
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EXPORT_SYMBOL_GPL(arizona_unregister_notifier);
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MODULE_DESCRIPTION("ASoC Wolfson Arizona class device support");
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_LICENSE("GPL");
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@ -306,6 +306,7 @@ extern int arizona_set_fll(struct arizona_fll *fll, int source,
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extern int arizona_init_spk(struct snd_soc_codec *codec);
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extern int arizona_init_gpio(struct snd_soc_codec *codec);
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extern int arizona_init_mono(struct snd_soc_codec *codec);
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extern int arizona_init_notifiers(struct snd_soc_codec *codec);
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extern int arizona_free_spk(struct snd_soc_codec *codec);
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@ -317,4 +318,13 @@ int arizona_set_output_mode(struct snd_soc_codec *codec, int output,
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extern bool arizona_input_analog(struct snd_soc_codec *codec, int shift);
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extern const char *arizona_sample_rate_val_to_name(unsigned int rate_val);
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extern int arizona_register_notifier(struct snd_soc_codec *codec,
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struct notifier_block *nb,
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int (*notify)(struct notifier_block *nb,
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unsigned long action,
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void *data));
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extern int arizona_unregister_notifier(struct snd_soc_codec *codec,
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struct notifier_block *nb);
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#endif
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@ -1096,6 +1096,7 @@ static int cs47l24_codec_probe(struct snd_soc_codec *codec)
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arizona_init_spk(codec);
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arizona_init_gpio(codec);
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arizona_init_mono(codec);
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arizona_init_notifiers(codec);
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_DSP_IRQ1,
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"ADSP2 Compressed IRQ", cs47l24_adsp2_irq,
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@ -2251,6 +2251,7 @@ static int wm5110_codec_probe(struct snd_soc_codec *codec)
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arizona_init_spk(codec);
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arizona_init_gpio(codec);
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arizona_init_mono(codec);
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arizona_init_notifiers(codec);
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_DSP_IRQ1,
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"ADSP2 Compressed IRQ", wm5110_adsp2_irq,
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