Disabling Linux driver for Arduino issue

Question

I'm writing a kernel module which will be kind of a driver for my Chinese Arduino. At one moment I had to disable existing arduino driver and make sure that arduino is not determined by system. I did it with rmmod command. Unplugged and plugged in my arduino. But it still determined in /dev/ as ttyUSB0, same as it was before.

Does it mean that I have more drivers on my system which I don't know about? Or every hardware plugged in usb port will be determined as a file regardless of driver existence? 0_0

Also, of course I have an arduino ide installed on my machine. Maybe there is a built-in driver? If so, how can I disable it without removing ide?

Thank you for the answers.

Answer 1

Does it mean that I have more drivers on my system which I don't know about?

Kernel may be configured to use a particular driver while user space still might change that.

The manual way: rmmod your driver, unplug Arduino, check system log with dmesg. Plug in Arduino, check dmesg again. Automated way: use usb-devices script from usbutils package (apt-get install usbutils) to list usb devices and the drivers associated with them.

After you find the associated driver, most likely ch341, rmmod it, or add to /etc/modprobe.d/blacklist to disable loading of this module permanently.