Commit dc77f161 authored by Rodolfo Giometti's avatar Rodolfo Giometti Committed by Linus Torvalds
Browse files

serial 8250: enable PPS support 



Automagically function serial8250_enable_ms() is called when PPS ldisc
is selected.

Signed-off-by: default avatarRodolfo Giometti <giometti@linux.it>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a0880df0

drivers/serial/8250.c

+16 −0
Original line number Diff line number Diff line
@@ -2407,6 +2407,21 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios, 
		tty_termios_encode_baud_rate(termios, baud, baud);

}



static void

serial8250_set_ldisc(struct uart_port *port)

{

	int line = port->line;



	if (line >= port->state->port.tty->driver->num)

		return;



	if (port->state->port.tty->ldisc->ops->num == N_PPS) {

		port->flags |= UPF_HARDPPS_CD;

		serial8250_enable_ms(port);

	} else

		port->flags &= ~UPF_HARDPPS_CD;

}



static void

serial8250_pm(struct uart_port *port, unsigned int state,

	      unsigned int oldstate)
@@ -2628,6 +2643,7 @@ static struct uart_ops serial8250_pops = { 
	.startup	= serial8250_startup,

	.shutdown	= serial8250_shutdown,

	.set_termios	= serial8250_set_termios,

	.set_ldisc	= serial8250_set_ldisc,

	.pm		= serial8250_pm,

	.type		= serial8250_type,

	.release_port	= serial8250_release_port,