bq24257_field_read
ret = bq24257_field_read(bq, F_IILIMIT);
ret = bq24257_field_read(bq, F_STAT);
ret = bq24257_field_read(bq, F_FAULT);
ret = bq24257_field_read(bq, F_LOOP_STATUS);
ret = bq24257_field_read(bq, F_IILIMIT);
ret = bq24257_field_read(bq, F_USB_DET);
ret = bq24257_field_read(bq, F_HZ_MODE);
ret = bq24257_field_read(bq, F_SYSOFF);