setPrescaler     2099 drivers/usb/serial/keyspan.c 		msg.setPrescaler = 0xff;
setPrescaler     2671 drivers/usb/serial/keyspan.c 		msg.setPrescaler = 0xff;
setPrescaler      154 drivers/usb/serial/keyspan_usa26msg.h 		setPrescaler,		// USA26: host requests prescalar be set (default: 13)
setPrescaler      152 drivers/usb/serial/keyspan_usa67msg.h 		setPrescaler,	// host requests prescalar be set (default: 13)