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i2c-powermac: Log errors

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Log errors when they happen, otherwise we have no idea what went
wrong.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Michel Daenzer <michel@daenzer.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Jean Delvare 2009-12-06 17:06:18 +01:00
parent 02864d58ce
commit d7d838a6eb
1 changed files with 23 additions and 5 deletions
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28
drivers/i2c/busses/i2c-powermac.c
View file

@ -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;