diff options
Diffstat (limited to 'sound/soc/soc-cache.c')
| -rw-r--r-- | sound/soc/soc-cache.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index bf593a8..91db7af 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -226,6 +226,40 @@ static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, } #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) +static unsigned int snd_soc_8_8_read_i2c(struct snd_soc_codec *codec, + unsigned int r) +{ + struct i2c_msg xfer[2]; + u8 reg = r; + u8 data; + int ret; + struct i2c_client *client = codec->control_data; + + /* Write register */ + xfer[0].addr = client->addr; + xfer[0].flags = 0; + xfer[0].len = 1; + xfer[0].buf = ® + + /* Read data */ + xfer[1].addr = client->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = 1; + xfer[1].buf = &data; + + ret = i2c_transfer(client->adapter, xfer, 2); + if (ret != 2) { + dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); + return 0; + } + + return data; +} +#else +#define snd_soc_8_8_read_i2c NULL +#endif + +#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) static unsigned int snd_soc_8_16_read_i2c(struct snd_soc_codec *codec, unsigned int r) { @@ -466,6 +500,7 @@ static struct { { .addr_bits = 8, .data_bits = 8, .write = snd_soc_8_8_write, .read = snd_soc_8_8_read, + .i2c_read = snd_soc_8_8_read_i2c, }, { .addr_bits = 8, .data_bits = 16, |