tag	line	file	source code
UART_MCR_OUT2	578	kernel/chr_drv/serial.c	UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
UART_MCR_OUT2	1109	kernel/chr_drv/serial.c	UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);