diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/ltc2978.c | 48 |
1 files changed, 29 insertions, 19 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index 33081d1d1c5a..7e10fbf8e133 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -388,10 +388,36 @@ static const struct regulator_desc ltc2978_reg_desc[] = { }; #endif /* CONFIG_SENSORS_LTC2978_REGULATOR */ +static int ltc2978_get_id(struct i2c_client *client) +{ + int chip_id; + + chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID); + if (chip_id < 0) + return chip_id; + + if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2) + return ltc2974; + else if (chip_id == LTC2977_ID) + return ltc2977; + else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2 || + chip_id == LTC2978A_ID) + return ltc2978; + else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) + return ltc3880; + else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) + return ltc3883; + else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) + return ltm4676; + + dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id); + return -ENODEV; +} + static int ltc2978_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int chip_id, i; + int i, chip_id; struct ltc2978_data *data; struct pmbus_driver_info *info; @@ -404,27 +430,11 @@ static int ltc2978_probe(struct i2c_client *client, if (!data) return -ENOMEM; - chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID); + chip_id = ltc2978_get_id(client); if (chip_id < 0) return chip_id; - if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2) { - data->id = ltc2974; - } else if (chip_id == LTC2977_ID) { - data->id = ltc2977; - } else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2 || - chip_id == LTC2978A_ID) { - data->id = ltc2978; - } else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) { - data->id = ltc3880; - } else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) { - data->id = ltc3883; - } else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) { - data->id = ltm4676; - } else { - dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id); - return -ENODEV; - } + data->id = chip_id; if (data->id != id->driver_data) dev_warn(&client->dev, "Device mismatch: Configured %s, detected %s\n", |