diff options
| author | Rodolfo Giometti <giometti@linux.it> | 2010-03-10 15:23:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:43 -0800 |
| commit | a0880df0ccde8d551fc4d88c455acb2ee0801e26 (patch) | |
| tree | 91153c79484ee379d663f5cc7a490d18bac710f9 /include/linux | |
| parent | 572b9adbd40b5565dc413db04af9cc234f72bf19 (diff) | |
pps: serial clients support
Adds support, by using the PPS line discipline, for the PPS sources
connected with the CD (Carrier Detect) pin of a serial port.
[akpm@linux-foundation.org: fix cast size warnings]
Signed-off-by: Rodolfo 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/serial_core.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 8c3dd36fe91..78dd1e7120a 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -491,9 +491,13 @@ uart_handle_dcd_change(struct uart_port *uport, unsigned int status) { struct uart_state *state = uport->state; struct tty_port *port = &state->port; + struct tty_ldisc *ld = tty_ldisc_ref(port->tty); + struct timespec ts; - uport->icount.dcd++; + if (ld && ld->ops->dcd_change) + getnstimeofday(&ts); + uport->icount.dcd++; #ifdef CONFIG_HARD_PPS if ((uport->flags & UPF_HARDPPS_CD) && status) hardpps(); @@ -505,6 +509,11 @@ uart_handle_dcd_change(struct uart_port *uport, unsigned int status) else if (port->tty) tty_hangup(port->tty); } + + if (ld && ld->ops->dcd_change) + ld->ops->dcd_change(port->tty, status, &ts); + if (ld) + tty_ldisc_deref(ld); } /** |