g_serial as USB serial console

gistfile1.txt

#/bin/bash

# Enable kernel module
echo "g_serial" >> /etc/modules

nano /etc/inittab
```
::respawn:/sbin/getty -L ttyAM0 115200 vt100
::respawn:/sbin/getty -L ttyGS0 115200 vt100
```

# Add systemd service
mkdir -p /etc/systemd/system/serial-getty@ttyGS0.service.d
nano /etc/systemd/system/serial-getty@ttyGS0.service.d/10-switch-role.conf

```
[Service]
ExecStartPre=-/bin/sh -c "echo 2 > /sys/bus/platform/devices/sunxi_usb_udc/otg_role"
```

# Start service
systemctl --no-reload enable serial-getty@ttyGS0.service
echo "ttyGS0" >> /etc/securetty

reboot