提交 239c9706 编写于 作者: D Dimitris Papastamos 提交者: Mark Brown

ASoC: Add snd_soc_codec_{readable,writable}_register()

Provide the top level ASoC core functions for indicating whether
a given register is readable or writable.
Signed-off-by: NDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: NLiam Girdwood <lrg@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
上级 8020454c
......@@ -278,6 +278,10 @@ int snd_soc_register_codec(struct device *dev,
void snd_soc_unregister_codec(struct device *dev);
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
unsigned int reg);
int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
unsigned int reg);
int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
unsigned int reg);
int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
int addr_bits, int data_bits,
enum snd_soc_control_type control);
......
......@@ -2146,6 +2146,42 @@ int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
/**
* snd_soc_codec_readable_register: Report if a register is readable.
*
* @codec: CODEC to query.
* @reg: Register to query.
*
* Boolean function indicating if a CODEC register is readable.
*/
int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
unsigned int reg)
{
if (codec->readable_register)
return codec->readable_register(codec, reg);
else
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
/**
* snd_soc_codec_writable_register: Report if a register is writable.
*
* @codec: CODEC to query.
* @reg: Register to query.
*
* Boolean function indicating if a CODEC register is writable.
*/
int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
unsigned int reg)
{
if (codec->writable_register)
return codec->writable_register(codec, reg);
else
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
/**
* snd_soc_new_ac97_codec - initailise AC97 device
* @codec: audio codec
......
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