The customer try to control UART1 CTS, but it seems that CTS should be controlled by TIOCM_RTS, not TIOCM_CTS.
According to the following ticket, it seems that should be controlled by TIOCM_RTS, but we’ re not sure why CTS was not controlled by TIOCM_CTS.
Could you tell me the reason of it?
Usually, CTS should be controlled by same signal name as TIOCM_CTS.
As you know, customer use “gpiolib-sysfs.c” that can be controlled 8-wire UART by using not ioctrl().
In this case, is it necessary to enable “crtscts”?
In the other words, if I would like to control UART1 to external device, it is NOT worked 2-wire UART, in specification of WP point of view.
Is that correct?