DWC_OTG_HOST_TIMER_RATE
hz / (1000 / DWC_OTG_HOST_TIMER_RATE),
hz / (1000 / DWC_OTG_HOST_TIMER_RATE),
ival = xfer->interval / DWC_OTG_HOST_TIMER_RATE;
ival = xfer->interval / DWC_OTG_HOST_TIMER_RATE;