From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Matthias Kaehlcke <mka@chromium.org>
Cc: Alexander Stein <alexander.stein@ew.tq-group.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: usb: Add binding for TI USB8041 hub controller
Date: Tue, 12 Jul 2022 23:32:59 +0200 [thread overview]
Message-ID: <1c19780c-6ce7-dd32-257d-7bdf8271055e@linaro.org> (raw)
In-Reply-To: <Ys3ngK0b4QtWbQKv@google.com>
On 12/07/2022 23:28, Matthias Kaehlcke wrote:
>>
>> But another question - why "peer-hub"? I remember some discussion about
>> naming, so was peer preferred over companion?
>
> Yes, Alan Stern pointed out that 'companion' can be confusing in the context
> of USB:
>
> 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).
>
> https://patchwork.kernel.org/comment/24912563/
Thanks, that explains a lot!
Best regards,
Krzysztof
next prev parent reply other threads:[~2022-07-12 21:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-12 15:06 [PATCH 1/3] dt-bindings: usb: Add binding for TI USB8041 hub controller Alexander Stein
2022-07-12 15:06 ` [PATCH 2/3] usb: misc: onboard_usb_hub: Add reset-gpio support Alexander Stein
2022-07-12 18:18 ` Matthias Kaehlcke
2022-07-13 6:46 ` Alexander Stein
2022-07-13 16:59 ` Matthias Kaehlcke
2022-07-14 6:10 ` Alexander Stein
2022-07-12 15:06 ` [PATCH 3/3] usb: misc: onboard_usb_hub: Add TI USB8041 hub support Alexander Stein
2022-07-12 17:25 ` [PATCH 1/3] dt-bindings: usb: Add binding for TI USB8041 hub controller Matthias Kaehlcke
2022-07-12 21:12 ` Krzysztof Kozlowski
2022-07-12 21:25 ` Matthias Kaehlcke
2022-07-12 21:32 ` Krzysztof Kozlowski
2022-07-13 6:09 ` Alexander Stein
2022-07-12 21:16 ` Krzysztof Kozlowski
2022-07-12 21:28 ` Matthias Kaehlcke
2022-07-12 21:32 ` Krzysztof Kozlowski [this message]
2022-07-13 7:20 ` Alexander Stein
2022-07-13 7:58 ` Krzysztof Kozlowski
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