From dc77f161aa5e81ddaf38390094c4f2ca3814e6b1 Mon Sep 17 00:00:00 2001 From: Rodolfo Giometti Date: Wed, 10 Mar 2010 15:23:48 -0800 Subject: [PATCH] serial 8250: enable PPS support Automagically function serial8250_enable_ms() is called when PPS ldisc is selected. Signed-off-by: Rodolfo Giometti Cc: David Woodhouse Cc: Greg KH Cc: Alan Cox Cc: Alexander Gordeev Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/serial/8250.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 7c4ebe6ee18b..c3db16b7afa1 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -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, -- 2.20.1