Hi jyijyi,
we are using the WP7607-1 [legato: 18.06.3]. On this modul, only gpioRI is supported.
root@swi-mdm9x28-wp:~# echo RI > /sys/class/gpio/export
root@swi-mdm9x28-wp:~# echo DCD > /sys/class/gpio/export
sh: write error: Operation not permitted
root@swi-mdm9x28-wp:~# echo DSR > /sys/class/gpio/export
sh: write error: Operation not permitted
root@swi-mdm9x28-wp:~# echo DTR > /sys/class/gpio/export
sh: write error: Operation not permitted
root@swi-mdm9x28-wp:~#
Do you know if the DCD/DSR/DTR lines will be supported in the futurte release?