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authorJoonyoung Shim <jy0922.shim@samsung.com>2009-09-07 12:04:37 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-09-07 11:14:12 +0100
commit341c9b84bc01040bd5c75140303e32f6b10098f3 (patch)
tree533e80e32b830445379f1df90cfb498bd26006d7 /sound/soc/soc-cache.c
parent85488037bb9b533b064be66412dbe1dbcd2734d9 (diff)
ASoC: Factor out I2C 8 bit address 8 bit data I/O
This patch is for the AK4671 codec driver using this format. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/soc-cache.c')
-rw-r--r--sound/soc/soc-cache.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index c8ceddc2a26..404231ee878 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -77,6 +77,35 @@ static int snd_soc_7_9_spi_write(void *control_data, const char *data,
#define snd_soc_7_9_spi_write NULL
#endif
+static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u8 *cache = codec->reg_cache;
+ u8 data[2];
+
+ BUG_ON(codec->volatile_register);
+
+ data[0] = reg & 0xff;
+ data[1] = value & 0xff;
+
+ if (reg < codec->reg_cache_size)
+ cache[reg] = value;
+
+ if (codec->hw_write(codec->control_data, data, 2) == 2)
+ return 0;
+ else
+ return -EIO;
+}
+
+static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u8 *cache = codec->reg_cache;
+ if (reg >= codec->reg_cache_size)
+ return -1;
+ return cache[reg];
+}
+
static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
@@ -151,6 +180,7 @@ static struct {
unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int);
} io_types[] = {
{ 7, 9, snd_soc_7_9_write, snd_soc_7_9_spi_write, snd_soc_7_9_read },
+ { 8, 8, snd_soc_8_8_write, NULL, snd_soc_8_8_read, NULL },
{ 8, 16, snd_soc_8_16_write, NULL, snd_soc_8_16_read,
snd_soc_8_16_read_i2c },
};