serial8250_TIOCM_to_MCR  234 drivers/tty/serial/8250/8250.h 		mctrl |= serial8250_TIOCM_to_MCR(mctrl_gpio);
serial8250_TIOCM_to_MCR 1928 drivers/tty/serial/8250/8250_port.c 	mcr = serial8250_TIOCM_to_MCR(mctrl);