We are seeing some 8000 interrupts/sec when we connect a USB rf sensor to our Cyclone V USB port. I’ve seen some info on the web that this is a known issue with the synopsys USB core. They also claim to have documentation on how to “tune” their system to prevent this. But we’re not synopsys customers. Does anyone know where to find the documentation for this? It’s not immediately obvious to me, if there is a kernel configuration for this…
Issue has been fixed in altera’s linux-socfpga.
patch: usb: dwc2: host: Don’t retry NAKed transactions right away