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ASoC: soc-cache: let reg be AND'ed by 0xff instead of data buffer for 8_8 mode 

The registers for AD193X are defined as 0x800-0x810 for spi which uses
16_8 mode, for i2c to support AD1937, we will use 8_8 mode, only the low
byte of 0x800-0x810 is valid.  The patch will not destory other codecs,
but make soc cache interface more useful.

Signed-off-by: Barry Song <barry.song@analog.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Barry Song 2010-03-18 16:17:01 +08:00 committed by Mark Brown
parent 85dfcdffc2
commit f4bee1bb00
1 changed files with 3 additions and 1 deletions
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4
sound/soc/soc-cache.c
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@ -159,7 +159,8 @@ static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,
BUG_ON(codec->volatile_register);
data[0] = reg & 0xff;
reg &= 0xff;
data[0] = reg;
data[1] = value & 0xff;
if (reg < codec->reg_cache_size)
@ -180,6 +181,7 @@ static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,
unsigned int reg)
{
u8 *cache = codec->reg_cache;
reg &= 0xff;
if (reg >= codec->reg_cache_size)
return -1;
return cache[reg];