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SubjectRe: [PATCH v22 2/3] usb: misc: Add onboard_usb_hub driver
On Mon, Jun 27, 2022 at 12:06:21PM -0700, Matthias Kaehlcke wrote:
> On Mon, Jun 27, 2022 at 02:54:03PM -0400, Alan Stern wrote:
> > On Mon, Jun 27, 2022 at 11:14:47AM -0700, Matthias Kaehlcke wrote:
> > >
> > > Further there must be only one platform device for onboard hubs with a
> > > companion hub (the hub is a single physical device). To achieve this two
> >
> > What do you mean by "companion hub"? I think you are using the wrong
> > word here. If you're talking about the relation between the two logical
> > hubs (one attached to the SuperSpeed bus and one attached to the
> > Low/Full/High-speed bus) within a physical USB-3 hub, the correct term
> > for this is "peer". See the existing usages in hub.h, hub.c, and
> > port.c.
> >
> > "Companion" refers to something completely different (i.e., the UHCI or
> > OHCI controllers that handle Low/Full-speed connections on behalf of a
> > High-speed EHCI controller).
>
> Yes it's the relation between the two logical hub. The term 'companion-hub'
> stems from the binding and has been around since v6 of this series. I guess
> we should update the binding if the terminology isn't correct.

That sounds like a good idea.

Alan Stern

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