On Wed, 24 Jul 2013, Sarah Sharp wrote:
> > > +#ifdef CONFIG_PM
> > > +static int xhci_plat_suspend(struct device *dev)
> > > +{
> > > + struct usb_hcd *hcd = dev_get_drvdata(dev);
> > > + struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> > > +
> > > + return xhci_suspend(xhci);
> > > +}
> >
> > Where does the wakeup setting get taken into account?
>
> Which wakeup setting are you talking about? Do you mean making sure the
> wake on bits are set for the roothub ports when the bus is suspended?
> Or do you mean that the platform device needs to have some way to enable
> wake from S3/S4 for the xHCI host controller itself?
The latter. Not only does there need to be some mechanism to wake up
the system from S3/S4 when the xHCI controller detects a wakeup event;
there also has to be a way to enable or disable this mechanism
depending on the value of device_may_wakeup(dev).
Alan Stern
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