From: Alan Stern <stern@rowland.harvard.edu>
To: Matthias Kaehlcke <mka@chromium.org>
Cc: Doug Anderson <dianders@chromium.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Mathias Nyman <mathias.nyman@intel.com>,
Felipe Balbi <balbi@kernel.org>,
Michal Simek <michal.simek@xilinx.com>,
LKML <linux-kernel@vger.kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Stephen Boyd <swboyd@chromium.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, Bastien Nocera <hadess@hadess.net>,
Peter Chen <peter.chen@kernel.org>,
Ravi Chandra Sadineni <ravisadineni@chromium.org>,
Roger Quadros <rogerq@kernel.org>,
Linux USB List <linux-usb@vger.kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Souradeep Chowdhury <quic_schowdhu@quicinc.com>
Subject: Re: [PATCH v22 2/3] usb: misc: Add onboard_usb_hub driver
Date: Mon, 27 Jun 2022 15:37:10 -0400 [thread overview]
Message-ID: <YroG5keFWVJo8JVR@rowland.harvard.edu> (raw)
In-Reply-To: <Yrn/rfrzSWod5SCT@google.com>
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
next prev parent reply other threads:[~2022-06-27 19:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-09 19:19 [PATCH v22 0/3] " Matthias Kaehlcke
2022-06-09 19:19 ` [PATCH v22 1/3] of/platform: Add stubs for of_platform_device_create/destroy() Matthias Kaehlcke
2022-06-09 19:19 ` [PATCH v22 2/3] usb: misc: Add onboard_usb_hub driver Matthias Kaehlcke
2022-06-15 21:09 ` Doug Anderson
2022-06-15 23:22 ` Matthias Kaehlcke
2022-06-16 20:12 ` Doug Anderson
2022-06-16 21:08 ` Matthias Kaehlcke
2022-06-16 21:28 ` Doug Anderson
2022-06-16 22:01 ` Matthias Kaehlcke
2022-06-16 22:46 ` Doug Anderson
2022-06-17 0:36 ` Matthias Kaehlcke
2022-06-17 15:09 ` Doug Anderson
2022-06-17 16:34 ` Matthias Kaehlcke
2022-06-24 20:33 ` Doug Anderson
2022-06-27 18:14 ` Matthias Kaehlcke
2022-06-27 18:54 ` Alan Stern
2022-06-27 19:06 ` Matthias Kaehlcke
2022-06-27 19:37 ` Alan Stern [this message]
2022-06-29 19:53 ` Doug Anderson
2022-06-09 19:20 ` [PATCH v22 3/3] usb: core: hub: Create platform devices for onboard hubs in hub_probe() Matthias Kaehlcke
2022-06-15 21:10 ` Doug Anderson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YroG5keFWVJo8JVR@rowland.harvard.edu \
--to=stern@rowland.harvard.edu \
--cc=balbi@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dianders@chromium.org \
--cc=frowand.list@gmail.com \
--cc=geert+renesas@glider.be \
--cc=gregkh@linuxfoundation.org \
--cc=hadess@hadess.net \
--cc=krzk@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mathias.nyman@intel.com \
--cc=michal.simek@xilinx.com \
--cc=mka@chromium.org \
--cc=peter.chen@kernel.org \
--cc=quic_schowdhu@quicinc.com \
--cc=ravisadineni@chromium.org \
--cc=robh+dt@kernel.org \
--cc=rogerq@kernel.org \
--cc=swboyd@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®