On Fri, Oct 27, 2023 at 10:29:38AM +0200, Jiri Slaby wrote: > On 27. 10. 23, 8:24, Crescent CY Hsieh wrote: > > MOXA PCIe boards have 4 serial interfaces and don't require additional > > stuff to switch between interfaces: > > > > - RS232 > > - RS422 > > - RS485_2W (half-duplex) > > - RS485_4W (full-duplex) > > > > By using ioctl command "TIOCRS485", it can switch between default > > interface and RS485 if supported. > > > > That means, for RS422/RS485 board, it can switch between RS422 and > > RS485 by setting the flags within struct serial_rs485. > > > > However, for the RS232/RS422/RS485 board, it can only switch between > > RS232 and RS485, there's no flag for switching interface into RS422. > > > > This patch adds a flag call "SER_RS422_ENALBED" in serial.h and modifies > > It's not "ENALBED". > > Anyway, I am afraid you have to split the patch into two: > 1) add the flag and core support (but wait a bit for others if they agree > with this approach) > 2) add the support for moxa. Agree, I will split this patch into two separate patches and only send the patch for adding the flag and core support first. --- Sincerely, Crescent CY Hsieh
