I occasionally connect an USB device with long wires of bad quality to a Jetson Nano. This device claims itself as an USB2 device. As a consequence, high speed (480MBits/s) is used over these wires. I don’t need such a speed so I’d like to force the USB host port of the Jetson Nano not to exceed full speed (12MBits/s).
I know this can be requested in the generic USB entry of the device tree. The line maximum-speed = “full-speed” is supposed to do the job. I used it successfully with another hardware.
My problem is that I cannot figure out where it can be specified with the Jetson platform. I have tried in the entry xusb and also in the entries xusb_padctl / pads / ports. But it fails to force full speed.
Any hint on how to do this ?