linux-kernel - Re: [PATCH v2 1/2] dt-bindings: usb: Add binding for WCH CH334/CH335 hub controller

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Message-ID: <176850297993.998584.15053974313992638434.robh@kernel.org>
Date: Thu, 15 Jan 2026 12:49:40 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Chaoyi Chen <kernel@...kyi.com>
Cc: Pin-yen Lin <treapking@...omium.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Quentin Schulz <quentin.schulz@...rry.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devicetree@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
	linux-kernel@...r.kernel.org,
	Mike Looijmans <mike.looijmans@...ic.nl>,
	Catalin Popescu <catalin.popescu@...ca-geosystems.com>,
	Jens Glathe <jens.glathe@...schoolsolutions.biz>,
	linux-usb@...r.kernel.org, Chaoyi Chen <chaoyi.chen@...k-chips.com>,
	J. Neuschäfer <j.ne@...teo.net>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: usb: Add binding for WCH CH334/CH335
 hub controller


On Tue, 13 Jan 2026 17:58:26 +0800, Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@...k-chips.com>
> 
> The WCH CH334/CH335[0] are USB2.0 protocol compliant 4-port USB HUB
> controller chips, supporting USB2.0 high-speed and full-speed for
> upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and
> low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT
> mode (single TT schedules 4 downstream ports in time share), but also
> supports high performance MTT mode (4 TTs each corresponding to 1 port,
> concurrent processing).
> 
> Add a device tree binding for it.
> 
> [0]: https://www.wch-ic.com/downloads/CH334DS1_PDF.html
> 
> Signed-off-by: Chaoyi Chen <chaoyi.chen@...k-chips.com>
> ---
> Changes in v2:
> - Fix the incorrect reset GPIO polarity.
> - Use a more meaningful supply name.
> ---
>  .../devicetree/bindings/usb/wch,ch334.yaml    | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/wch,ch334.yaml
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>