max8997_get_voltage_register
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);