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Date: Mon, 16 Sep 2013 08:40:59 +0200 From: Paul Chavent <Paul.Chavent@...ra.fr> To: linux-usb@...r.kernel.org, gregkh@...uxfoundation.org, jhovold@...il.com, fschaefer.oss@...glemail.com, jslaby@...e.cz, max@...e.de, giometti@...eenne.com Cc: linux-kernel@...r.kernel.org, Paul Chavent <Paul.Chavent@...ra.fr> Subject: [PATCH 1/2] 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 <paul.chavent@...ra.fr> --- 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; -- 1.7.12.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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