diff options
| author | Barry Song <21cnbao@gmail.com> | 2010-03-18 09:17:01 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-03-18 12:23:23 +0100 |
| commit | f4bee1bb0083869b1b7d73c6eda7703a7aae0506 (patch) | |
| tree | 9c2202d7969ff5ea2cdde8b7ff2a573f7cb9bc08 /sound/soc/soc-cache.c | |
| parent | ASoC: soc-cache: add i2c read entry for 8_8 mode (diff) | |
| download | linux-f4bee1bb0083869b1b7d73c6eda7703a7aae0506.tar.xz linux-f4bee1bb0083869b1b7d73c6eda7703a7aae0506.zip | |
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>
Diffstat (limited to 'sound/soc/soc-cache.c')
| -rw-r--r-- | sound/soc/soc-cache.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index 91db7afb1210..9dfe9a58a314 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -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]; |