setDtr           2452 drivers/usb/serial/keyspan.c 	msg.setDtr = 0xff;
setDtr           2603 drivers/usb/serial/keyspan.c 	msg.setDtr = 0x01;
setDtr            160 drivers/usb/serial/keyspan_usa49msg.h 		setDtr,			// host requests DTR output be set
setDtr             85 drivers/usb/serial/keyspan_usa90msg.h 		setDtr, 		// host requests DTR output be set