[LinuxPPS] [PATCH 07/11] serial 8250: enable PPS support.

[Rodolfo Giometti]

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

Signed-off-by: Rodolfo Giometti <giometti at linux.it>
---
 drivers/serial/8250.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index fb867a9..4d7d9b1 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2411,6 +2411,18 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
 }
 
 static void
+serial8250_set_ldisc(struct uart_port *port)
+{
+	int line = port->line;
+
+	if (line >= port->info->port.tty->driver->num)
+		return;
+
+	if (port->info->port.tty->ldisc->ops->num == N_PPS)
+		serial8250_enable_ms(port);
+}
+
+static void
 serial8250_pm(struct uart_port *port, unsigned int state,
 	      unsigned int oldstate)
 {
@@ -2624,6 +2636,7 @@ 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,
-- 
1.6.0.4