diff options
Diffstat (limited to 'drivers/i2c/algos/i2c-algo-bit.c')
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-bit.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index a39e6cff86e7..38319a69bd0a 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -600,12 +600,14 @@ static const struct i2c_algorithm i2c_bit_algo = { /* * registering functions to load algorithms at runtime */ -static int i2c_bit_prepare_bus(struct i2c_adapter *adap) +static int __i2c_bit_add_bus(struct i2c_adapter *adap, + int (*add_adapter)(struct i2c_adapter *)) { struct i2c_algo_bit_data *bit_adap = adap->algo_data; + int ret; if (bit_test) { - int ret = test_bus(bit_adap, adap->name); + ret = test_bus(bit_adap, adap->name); if (ret < 0) return -ENODEV; } @@ -614,30 +616,27 @@ static int i2c_bit_prepare_bus(struct i2c_adapter *adap) adap->algo = &i2c_bit_algo; adap->retries = 3; + ret = add_adapter(adap); + if (ret < 0) + return ret; + + /* Complain if SCL can't be read */ + if (bit_adap->getscl == NULL) { + dev_warn(&adap->dev, "Not I2C compliant: can't read SCL\n"); + dev_warn(&adap->dev, "Bus may be unreliable\n"); + } return 0; } int i2c_bit_add_bus(struct i2c_adapter *adap) { - int err; - - err = i2c_bit_prepare_bus(adap); - if (err) - return err; - - return i2c_add_adapter(adap); + return __i2c_bit_add_bus(adap, i2c_add_adapter); } EXPORT_SYMBOL(i2c_bit_add_bus); int i2c_bit_add_numbered_bus(struct i2c_adapter *adap) { - int err; - - err = i2c_bit_prepare_bus(adap); - if (err) - return err; - - return i2c_add_numbered_adapter(adap); + return __i2c_bit_add_bus(adap, i2c_add_numbered_adapter); } EXPORT_SYMBOL(i2c_bit_add_numbered_bus); |