Li Yang wrote: > On 9/7/06, Alex Zeffertt <[EMAIL PROTECTED]> wrote: >> Li Yang-r58472 wrote: >> >> i have a MPC8347E running with the Freescale E(F)HCI driver >> >> and Kernel 2.6.17 (Freescale LTIB). >> >> >> >> Because of this mail, i checked, if there are any periodical >> >> interrupts, without real USB payload. >> >> >> >> The result is: NO >> >> >> >> If i attach a USB-mouse, i get 5 interrupts. >> >> If i remove it again, 1 additional. >> >> >> >> Nothing else, silence ! >> >> >> >> USB works well with USB 1.1 and 2.0 devices (This was not the >> >> case with earlier Kernels, e.g. 2.6.13, because for the >> >> switching between 1.1 and 2.0 you need a transaction >> >> translator driver). >> > >> > MPC834x USB is very different from the USB of CPM/QE. It is an >> > integrated EHCI controller. >> > >> >> >> So, the question is still open, does the QuiccEngine HCI (a.k.a. FHCI) >> generate loading on the PPC core when there is no traffic on the USB? > > Yes, but no. If the bus is idle for some time, you can put the bus > into suspend state. Then there will be no extra load to the core. >
Is that what Freescale's linux driver does then? Can it detect new USB devices in suspend state? Regards, Alex _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded