gb_tty_write 589 drivers/staging/greybus/uart.c retval = gb_tty_write(tty, &stop_char, 1); gb_tty_write 608 drivers/staging/greybus/uart.c retval = gb_tty_write(tty, &start_char, 1); gb_tty_write 797 drivers/staging/greybus/uart.c .write = gb_tty_write,