Hi!
> > > If that does the job we need to somehow inherit the power supply maximum
> > > from
> > > PCI when we allocate the root hub's device structure.
> >
> > I don't think there is such a convention that's generic for PCI. There
> > might
> > be ACPI-specific tables holding that value, but on embedded hardware the
> > model
> > is often that the arch/.../board-ZZZ.c file just "knows" things like how
> > much
> > power the regulator powering that port can provide, and arranges bus_mA to
> > match.
> > Just like it knows all sorts of other details about how that board works.
>
> Yes, I am afraid it cannot be done on the fly. But we might use a symbolic
> define which a subarch can override instead of a literal "500".
> If it turns out that this problem is one of power and not some other
> deficiency of this system's root hub.
That's bad... because we don't know exact model until runtime (ARM
tries to support many machines with single binary kernel, AFAICS), and
this is very likely going to be model-dependend.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
_______________________________________________
linux-usb-devel@lists.sourceforge.net
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
