RE: The corner case for USB remote wakeup

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> > >
> > > Okay, I didn't realize you wanted to change the PHY state in
> > > ehci_hub_control also.  You would power-down the PHY whenever every
> > > connected port was suspended, right?
> >
> > Oh, I have no experiences on multi-port system, all Freescale i.mx SoC
> > has only one port.
> 
> I take it in case of multiport system, you'd have one phy per port ? Or
> are
> there phys that can operate with multiple ULPI inputs (aka. one phy per
> multiple
> CPU ports)?
> 
Just confirm with IC guys, one phy for one port.
So, Alan, for your questions, it should power-down the individual PHY when
corresponding individual port is suspended.

> > > So consider this scenario instead.  There is no intermediate hub, but
> > > there are two devices plugged directly into the root hub: a 3G modem
> > > and a flash drive.
> 
> Is this possible on MXS?
All i.mx SoCs has one port, including mxs.

 


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