Hi Delphine, On top of Guenter's comments, [...] > +config SENSORS_LTC4286 > + bool "Linear Technologies LTC4286" > + help > + If you say yes here you get hardware monitoring support for Linear > + Technology LTC4286. could you add a couple of words more here? [...] > +static int ltc4286_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + int ret; > + u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; > + struct device *dev = &client->dev; > + struct pmbus_driver_info *info; > + u32 rsense; > + > + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); > + if (ret < 0) { > + dev_err(&client->dev, "failed to read manufacturer id\n"); you can use dev_err_probe() here: return dev_err_probe(&client->dev, err, "failed to read manufacturer id\n"); > + return ret; > + } > + > + /* Refer to ltc4286 datasheet page 20 > + * the default manufacturer id is LTC > + */ > + if (ret != LTC4286_MFR_ID_SIZE || > + strncmp(block_buffer, "LTC", LTC4286_MFR_ID_SIZE)) { > + dev_err(&client->dev, "unsupported manufacturer id\n"); > + return -ENODEV; > + } > + > + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); > + if (ret < 0) { > + dev_err(&client->dev, "failed to read manufacturer model\n"); > + return ret; > + } Is this read really needed? Andi [...]