/sys/class/tty/ttyd1/subsystem/ttyS0/device/bus/devices/rt3xxx-ohci/usb1/1-0%3A1.0/ep_81/

../
bEndpointAddress      4096
bInterval             4096
bLength               4096
bmAttributes          4096
dev                   4096
device/
direction             4096
interval              4096
subsystem/
type                  4096
uevent                4096
wMaxPacketSize        4096