From f4bee1bb0083869b1b7d73c6eda7703a7aae0506 Mon Sep 17 00:00:00 2001 From: Barry Song <21cnbao@gmail.com> Date: Thu, 18 Mar 2010 16:17:01 +0800 Subject: [PATCH] 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 Acked-by: Liam Girdwood Signed-off-by: Mark Brown --- sound/soc/soc-cache.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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]; -- 2.20.1