diff options
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-powermac.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c index dba8e387f43f..5c22d9f0289b 100644 --- a/drivers/i2c/busses/i2c-powermac.c +++ b/drivers/i2c/busses/i2c-powermac.c @@ -108,16 +108,25 @@ static s32 i2c_powermac_smbus_xfer( struct i2c_adapter* adap, } rc = pmac_i2c_open(bus, 0); - if (rc) + if (rc) { + dev_err(&adap->dev, "Failed to open I2C, err %d\n", rc); return rc; + } rc = pmac_i2c_setmode(bus, mode); - if (rc) + if (rc) { + dev_err(&adap->dev, "Failed to set I2C mode %d, err %d\n", + mode, rc); goto bail; + } rc = pmac_i2c_xfer(bus, addrdir, subsize, subaddr, buf, len); - if (rc) + if (rc) { + dev_err(&adap->dev, + "I2C transfer at 0x%02x failed, size %d, err %d\n", + addrdir >> 1, size, rc); goto bail; + } if (size == I2C_SMBUS_WORD_DATA && read) { data->word = ((u16)local[1]) << 8; @@ -157,12 +166,21 @@ static int i2c_powermac_master_xfer( struct i2c_adapter *adap, addrdir ^= 1; rc = pmac_i2c_open(bus, 0); - if (rc) + if (rc) { + dev_err(&adap->dev, "Failed to open I2C, err %d\n", rc); return rc; + } rc = pmac_i2c_setmode(bus, pmac_i2c_mode_std); - if (rc) + if (rc) { + dev_err(&adap->dev, "Failed to set I2C mode %d, err %d\n", + pmac_i2c_mode_std, rc); goto bail; + } rc = pmac_i2c_xfer(bus, addrdir, 0, 0, msgs->buf, msgs->len); + if (rc < 0) + dev_err(&adap->dev, "I2C %s 0x%02x failed, err %d\n", + addrdir & 1 ? "read from" : "write to", addrdir >> 1, + rc); bail: pmac_i2c_close(bus); return rc < 0 ? rc : 1; |