def METHOD_NAME(self):
    """
    Retrieves watchdog device
    """
    wdt_main_dev_list = [dev for dev in os.listdir(
        "/dev/") if dev.startswith("watchdog") and self._is_wd_main(dev)]
    if not wdt_main_dev_list:
        return None
    wdt_main_dev_name = wdt_main_dev_list[0]
    watchdog_device_path = "/dev/{}".format(wdt_main_dev_name)
    try:
        watchdog = os.open(watchdog_device_path, os.O_RDWR)
    except (FileNotFoundError, IOError, OSError):
        watchdog = None
    except SystemExit:
        pass
    return watchdog, wdt_main_dev_name