diff options
Diffstat (limited to 'freebsd/sys/dev/usb/serial/umcs.c')
| -rw-r--r-- | freebsd/sys/dev/usb/serial/umcs.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/freebsd/sys/dev/usb/serial/umcs.c b/freebsd/sys/dev/usb/serial/umcs.c index 8f083ce3..3a5fc70f 100644 --- a/freebsd/sys/dev/usb/serial/umcs.c +++ b/freebsd/sys/dev/usb/serial/umcs.c @@ -501,7 +501,9 @@ umcs7840_cfg_open(struct ucom_softc *ucom) * Enable DTR/RTS on modem control, enable modem interrupts -- * documented */ - sc->sc_ports[pn].sc_mcr = MCS7840_UART_MCR_DTR | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; + sc->sc_ports[pn].sc_mcr = MCS7840_UART_MCR_IE; + if (ucom->sc_tty == NULL || (ucom->sc_tty->t_termios.c_cflag & CNO_RTSDTR) == 0) + sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_DTR | MCS7840_UART_MCR_RTS; if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr)) return; |