On Fri, 2013-10-11 at 14:47 +0200, Hendrik Brueckner wrote: > The tiocmget/tiocmset callbacks are used to set and get modem status and > triggered through an tty ioctl. > > The dtr_rts() callback is different and it is used for DTS/RTS handshaking > between the hvc_console (or any other tty_port) and the tty layer. The tty > port layer uses this callback to signal the hvc_console whether to raise or > lower the DTR/RTS lines. This is different than the ioctl interface to > controls the modem status. Well, DTR at least is the same via both callbacks... Also normal handshaking is normally RTS/CTS, only some HW setups "hijacks" DTR for RTS (old Macs come to mind). Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
