lkml.org 
[lkml]   [2011]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5/8] serial: 8250: reject delaying RTS with RS485
    Date
    There might be chips capable of doing this, but for now nothing is implemented,
    so reject usage of this feature.

    Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
    ---
    drivers/tty/serial/8250.c | 3 +++
    1 files changed, 3 insertions(+), 0 deletions(-)

    diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
    index 6a2f47f..28b3608 100644
    --- a/drivers/tty/serial/8250.c
    +++ b/drivers/tty/serial/8250.c
    @@ -2735,6 +2735,9 @@ static int serial8250_ioctl_port(struct uart_port *port,
    sizeof(rs485ctrl)))
    return -EFAULT;

    + if (rs485ctrl.delay_rts_before_send || rs485ctrl.delay_rts_after_send)
    + return -EOPNOTSUPP;
    +
    spin_lock_irqsave(&up->port.lock, flags);
    lcr = serial_inp(up, UART_LCR);
    serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B);
    --
    1.7.7.1


    \
     
     \ /
      Last update: 2011-11-16 17:27    [W:0.020 / U:30.572 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site