I'm struggling to determine if AUTORTS mode is currently supported in 3.10 ?
I have dug into the source code, and can see various references to the relevant bits
in the various UART registers, but I'm at a lose as to how to actually *enable* the
mode !!
In drivers/tty/omap-serial.c serial_omap_set_termios() we have:-
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) {
/* Enable AUTORTS and AUTOCTS */
up->efr |= UART_EFR_CTS | UART_EFR_RTS;
/* Ensure MCR RTS is asserted */
up->mcr |= UART_MCR_RTS;
} else {
...
}
So it looks like I need to set the CRTSCTS and UPF_HARD_FLOW flags.
>From userspace, I've tried:-
$ stty -F /dev/ttyO2 crtscts
But I've not idea how to enable UPF_HARD_FLOW !?!
Can anyone point me in the right direction ?
Cheers
Mark J.