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ASoC: Add default snd_soc_default_writable_register() callback

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By using struct snd_soc_reg_access for the read/write/vol attributes
of the registers, we provide callbacks that automatically determine whether
a given register is readable/writable or volatile.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos
2011-03-24 13:45:17 +00:00
committed by Mark Brown
parent acd61451e5
commit 8020454c9a
3 changed files with 21 additions and 0 deletions
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14
sound/soc/soc-cache.c
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@@ -1449,3 +1449,17 @@ int snd_soc_default_readable_register(struct snd_soc_codec *codec,
return codec->driver->reg_access_default[index].read;
}
EXPORT_SYMBOL_GPL(snd_soc_default_readable_register);
int snd_soc_default_writable_register(struct snd_soc_codec *codec,
unsigned int reg)
{
int index;
if (reg >= codec->driver->reg_cache_size)
return 1;
index = snd_soc_get_reg_access_index(codec, reg);
if (index < 0)
return 0;
return codec->driver->reg_access_default[index].write;
}
EXPORT_SYMBOL_GPL(snd_soc_default_writable_register);