Hi, to conclude this thread: the Winbond W83627UHG, used in my brand new device, really does not support the automatic RTS toggle for the RS-485 line. Thus the most appropriate solution appears to be the RTS toggling from within a driver. Cheers, Tomas On Tue, Nov 29, 2011 at 6:15 PM, Tomas Lastovicka <tomas.lastovicka@xxxxxxxxx> wrote: > Thanks for both links Wolfram! I will find out what revision i actually have. > > Best, > Tomas > > > On Tue, Nov 29, 2011 at 5:36 PM, Wolfram Sang <w.sang@xxxxxxxxxxxxxx> wrote: >> On Tue, Nov 29, 2011 at 05:25:32PM -0500, Tomas Lastovicka wrote: >> >>> Then i definitely have a different datasheet (v1.41). No 485 matches were found. >> >> I got v1.7: >> >> http://www.nuvoton.com/NuvotonMOSS/Community/ProductInfo.aspx?tp_GUID=8310ab06-af65-4ec9-92a6-17cf791aa9f2 >> >> Ah, it says RS485 is only available on Revision E. Hopefully, you have that. >> >>> 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). >> >> I think that was the first RS485 one, so probably just lucky ;) >> >> If you are interested, another series adding support for 8250-variants that >> have HW support can be found here: >> >> http://lkml.org/lkml/2011/11/16/270 >> >> 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
