[IMX6Q] How to connect 2 gadget serial ports to otg port.

gbpark · ‎11-15-2021

I can use OTG port as /dev/ttyGS0 with gadget serial setting.
but, I want to allocate more gadget serial port to /dev/ttyGS1.
I activated /dev/ttyGS1 in the following way, but it does not connect to OTG.

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root@imx6qpdlsolox:~# mkdir /sys/kernel/config/usb_gadget/g1
root@imx6qpdlsolox:~# cd /sys/kernel/config/usb_gadget /g1
root@imx6qpdlsolox:~# echo 0xabcd > idVendor
root@imx6qpdlsolox:~# echo 0x1234 > idProduct
root@imx6qpdlsolox:~# mkdir strings/0x409
root@imx6qpdlsolox:~# echo myserial > strings/0x409/serialnumber
root@imx6qpdlsolox:~# echo mymfg > strings/0x409/manufacturer
root@imx6qpdlsolox:~# echo myproduct > strings/0x409/product
root@imx6qpdlsolox:~# mkdir configs/c.1
root@imx6qpdlsolox:~# echo 120 > configs/c.1/MaxPower
root@imx6qpdlsolox:~# mkdir functions/acm.0
root@imx6qpdlsolox:~# ln -s functions/acm.0 configs/c.1
root@imx6qpdlsolox:~# ls /sys/class/udc > UDC
ls: write error: Device or resource busy
root@imx6qpdlsolox:~# lsmod
Module Size Used by
root@imx6qpdlsolox:~#
================================================================

Please guide me on how to set it up.

I can use OTG port as /dev/ttyGS0 with gadget serial setting.but, I want to allocate more gadget serial port to /dev/ttyGS1.I activated /dev/ttyGS1 in the following way, but it does not connect to OTG.================================================================root@imx6qpdlsolox:~# mkdir /sys/kernel/config/usb_gadget/g1root@imx6qpdlsolox:~# cd /sys/kernel/config/usb_gadget /g1root@imx6qpdlsolox:~# echo 0xabcd > idVendorroot@imx6qpdlsolox:~# echo 0x1234 > idProductroot@imx6qpdlsolox:~# mkdir strings/0x409root@imx6qpdlsolox:~# echo myserial > strings/0x409/serialnumberroot@imx6qpdlsolox:~# echo mymfg > strings/0x409/manufacturerroot@imx6qpdlsolox:~# echo myproduct > strings/0x409/productroot@imx6qpdlsolox:~# mkdir configs/c.1root@imx6qpdlsolox:~# echo 120 > configs/c.1/MaxPowerroot@imx6qpdlsolox:~# mkdir functions/acm.0root@imx6qpdlsolox:~# ln -s functions/acm.0 configs/c.1root@imx6qpdlsolox:~# ls /sys/class/udc > UDCls: write error: Device or resource busyroot@imx6qpdlsolox:~# lsmodModule Size Used byroot@imx6qpdlsolox:~#================================================================Please guide me on how to set it up.

Rita_Wang · ‎12-30-2021

Recommend you to use one, https://community.nxp.com/t5/i-MX-Processors/How-use-USB-as-both-gadget-mode-and-host-mode-usb-USB-O...this will do some help for you.