SL811 USB Host Controller not working

Hi everyone,

we have a PXA255 based development board here that also features a Cypress
SL811 USB Host Controller. I tried to access it with the devu-uhci driver
and it does recognize the controller, but it would not recognize any device
plugged into the port. Under Linux it works fine. devu-ohci doesn’t work at
all. Some people tell me that this controller does not 100% conform to xHCI
spec. Anyone has experienced this? We use 6.3.0SP2.

Thanks in advance,