Hello,
I am uisng STM32MP157C Evalution board, and connected QUECTEL EC25-E board to this board using usb to miniusb cable,
now i am able get the PID and VID from lsusb but, the drivers are not showing in /dev/tty*
and option1 directory also not created in /sys/bus/usb-serial/drivers
If it is Linux OS and built by yourself，please check the .config.
Whether CONFIG_USB_SERIAL_OPTION has been selected or not.