XHWICAP_MINOR
devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR + id);
probed_devices[MINOR(dev->devt)-XHWICAP_MINOR] = 0;
devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);
dev_t devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);