Then i definitely have a different datasheet (v1.41). No 485 matches were found. Indeed, if it has support then there is no need for software toggle (although i still think it is done this way in the Etrax driver coming with the kernel). On Tue, Nov 29, 2011 at 5:20 PM, Wolfram Sang <w.sang@xxxxxxxxxxxxxx> wrote: > >> Unless i have overlooked something, i do not see how to toggle the >> automatic RTS mode from W83627UHG's datasheet. Have you found it? > > Yes, searching for '485' gives you all the info you need (if we got the same > datasheet). > >> Regarding 2.6.38+ drivers, Atmel supports RS485 on the hardware level >> and Etrax is handling the RTS toggling directly from the driver. I > > Hardware level is the only official supported way in Linux. Software toggling > can easily fail due to preemption. > >> guess this is what i will finally have to do, i.e. to toggle RTS from >> the driver myself. > > Why? If the hardware has support? > >> I am surprised that the RTS toggling issue for RS485 in Linux is >> around for quite a while. > > It has come a long way, but all you need is there now (except for software > based direction control, see above). > > Regards, > > Wolfram > > -- > Pengutronix e.K. | Wolfram Sang | > Industrial Linux Solutions | http://www.pengutronix.de/ | > -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
