diff options
| -rw-r--r-- | include/sound/soc.h | 2 | ||||
| -rw-r--r-- | sound/soc/soc-core.c | 17 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index e6704c0a440..94fcc65609b 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -191,6 +191,7 @@ int snd_soc_register_platform(struct snd_soc_platform *platform); void snd_soc_unregister_platform(struct snd_soc_platform *platform); int snd_soc_register_codec(struct snd_soc_codec *codec); void snd_soc_unregister_codec(struct snd_soc_codec *codec); +int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg); #ifdef CONFIG_PM int snd_soc_suspend_device(struct device *dev); @@ -361,6 +362,7 @@ struct snd_soc_codec { int (*write)(struct snd_soc_codec *, unsigned int, unsigned int); int (*display_register)(struct snd_soc_codec *, char *, size_t, unsigned int); + int (*volatile_register)(unsigned int); hw_write_t hw_write; hw_read_t hw_read; void *reg_cache; diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index dfc03c0bacb..8bf49a4e664 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1125,6 +1125,23 @@ static int soc_new_pcm(struct snd_soc_device *socdev, return ret; } +/** + * snd_soc_codec_volatile_register: Report if a register is volatile. + * + * @codec: CODEC to query. + * @reg: Register to query. + * + * Boolean function indiciating if a CODEC register is volatile. + */ +int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg) +{ + if (codec->volatile_register) + return codec->volatile_register(reg); + else + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register); + /* codec register dump */ static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf) { |