diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-07-05 15:12:22 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-07-05 15:12:22 +0100 |
| commit | 096e49d5e6f7bd93395e7ddf7e0239e1644d0505 (patch) | |
| tree | 8247ad9e691171481fa00fd3cb301bb4f03779d8 | |
| parent | af0adf3e81dbcf782388b8a7d0d7094ef5e70f50 (diff) | |
ASoC: Add CODEC volatile register operation
Add a volatile_register() operation to the CODEC structure providing a
standard operation to query if a register is volatile. This will be used
to factor out the register cache I/O operations for the CODECs.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -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) { |