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Subject[PATCH 5/6] serial 8250: enable PPS support.
Automagically function serial8250_enable_ms() is called when PPS ldisc
is selected.

Signed-off-by: Rodolfo Giometti <giometti@linux.it>
---
drivers/serial/8250.c | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index c3e37c8..48aa0b4 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2413,6 +2413,21 @@ 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->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)
{
@@ -2626,6 +2641,7 @@ 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,
--
1.6.3.3


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