On Thu, Feb 18, 2021 at 07:51:27AM +0100, Thomas Petazzoni wrote: > Hello, > > On Thu, 18 Feb 2021 06:55:53 +0300 > Alexander Shiyan <shc_work@xxxxxxx> wrote: > > > I wrote a little inaccurately, I did not mean a physical interface RS-485, > > but rather a time-critical MODBUS protocol. (In our case it used on top on RS-485). > > OK, so it's not about 232 vs 485. > > > I do not know how best to solve this problem, it may be an additional parameter > > for the devicetree, but in this case it is not clear how to manage it if the > > devicetree is not used ... > > No, it cannot be a parameter in the Device Tree, as what we're talking > about is not hardware description, but configuration of the hardware > for particular use cases. > > > This could be a Kconfig item (but something's not very good either). > > Probably the best solution is to adapt some kind of IOCTL (or control via SYSFS). > > Greg, Jiri, perhaps you could comment on what would be the appropriate > user-space interface to use or add to be able to configure such aspects > of a UART controller ? What aspects need configuring and why is this uart so unique from all others that it can't use the normal configuration methods? thanks, greg k-h
