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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>
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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10
include/linux/mfd/arizona/core.h
View File

@ -14,6 +14,7 @@
#define _WM_ARIZONA_CORE_H
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/arizona/pdata.h>
@ -148,8 +149,17 @@ struct arizona {
uint16_t dac_comp_coeff;
uint8_t dac_comp_enabled;
struct mutex dac_comp_lock;
struct blocking_notifier_head notifier;
};
static inline int arizona_call_notifiers(struct arizona *arizona,
unsigned long event,
void *data)
{
return blocking_notifier_call_chain(&arizona->notifier, event, data);
}
int arizona_clk32k_enable(struct arizona *arizona);
int arizona_clk32k_disable(struct arizona *arizona);

35
sound/soc/codecs/arizona.c
View File

@ -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");

10
sound/soc/codecs/arizona.h
View File

@ -306,6 +306,7 @@ extern int arizona_set_fll(struct arizona_fll *fll, int source,
extern int arizona_init_spk(struct snd_soc_codec *codec);
extern int arizona_init_gpio(struct snd_soc_codec *codec);
extern int arizona_init_mono(struct snd_soc_codec *codec);
extern int arizona_init_notifiers(struct snd_soc_codec *codec);
extern int arizona_free_spk(struct snd_soc_codec *codec);
@ -317,4 +318,13 @@ int arizona_set_output_mode(struct snd_soc_codec *codec, int output,
extern bool arizona_input_analog(struct snd_soc_codec *codec, int shift);
extern const char *arizona_sample_rate_val_to_name(unsigned int rate_val);
extern int arizona_register_notifier(struct snd_soc_codec *codec,
struct notifier_block *nb,
int (*notify)(struct notifier_block *nb,
unsigned long action,
void *data));
extern int arizona_unregister_notifier(struct snd_soc_codec *codec,
struct notifier_block *nb);
#endif

1
sound/soc/codecs/cs47l24.c
View File

@ -1096,6 +1096,7 @@ static int cs47l24_codec_probe(struct snd_soc_codec *codec)
arizona_init_spk(codec);
arizona_init_gpio(codec);
arizona_init_mono(codec);
arizona_init_notifiers(codec);
ret = arizona_request_irq(arizona, ARIZONA_IRQ_DSP_IRQ1,
"ADSP2 Compressed IRQ", cs47l24_adsp2_irq,

1
sound/soc/codecs/wm5110.c
View File

@ -2251,6 +2251,7 @@ static int wm5110_codec_probe(struct snd_soc_codec *codec)
arizona_init_spk(codec);
arizona_init_gpio(codec);
arizona_init_mono(codec);
arizona_init_notifiers(codec);
ret = arizona_request_irq(arizona, ARIZONA_IRQ_DSP_IRQ1,
"ADSP2 Compressed IRQ", wm5110_adsp2_irq,