Push a char to the uart layer
void uart_insert_char(struct uart_port * port, unsigned int status, unsigned int overrun, unsigned int ch, unsigned int flag);
port
corresponding port
status
state of the serial port RX buffer (LSR for 8250)
overrun
mask of overrun bits in status
ch
character to push
flag
flag for the character (see TTY_NORMAL and friends)
User is responsible to call tty_flip_buffer_push when they are done with insertion.