From d14654dff7a3520b5220367b848732a0a8ccdabe Mon Sep 17 00:00:00 2001 From: Paul Chavent Date: Mon, 16 Sep 2013 08:40:59 +0200 Subject: [PATCH] USB: serial: call handle_dcd_change in ftdi driver. When the device receive a DCD status change, forward the signal to the USB serial system. This way, we can detect, for instance, PPS pulses. Signed-off-by: Paul Chavent Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/ftdi_sio.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index c45f9c0..f53298d 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1966,8 +1966,16 @@ static int ftdi_process_packet(struct usb_serial_port *port, port->icount.dsr++; if (diff_status & FTDI_RS0_RI) port->icount.rng++; - if (diff_status & FTDI_RS0_RLSD) + if (diff_status & FTDI_RS0_RLSD) { + struct tty_struct *tty; + port->icount.dcd++; + tty = tty_port_tty_get(&port->port); + if (tty) + usb_serial_handle_dcd_change(port, tty, + status & FTDI_RS0_RLSD); + tty_kref_put(tty); + } wake_up_interruptible(&port->port.delta_msr_wait); priv->prev_status = status; -- 2.7.4