linux-kernel - Re: [PATCH v4 3/5] dt-bindings: usb: usb-device: add usb hub port vbus-supply suppport

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Message-ID: <20250915205849.GA3379566-robh@kernel.org>
Date: Mon, 15 Sep 2025 15:58:49 -0500
From: Rob Herring <robh@...nel.org>
To: Marco Felsch <m.felsch@...gutronix.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Matthias Kaehlcke <mka@...omium.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	kernel@...gutronix.de
Subject: Re: [PATCH v4 3/5] dt-bindings: usb: usb-device: add usb hub port
 vbus-supply suppport

On Thu, Sep 11, 2025 at 10:22:44PM +0200, Marco Felsch wrote:
> Some PCB designs don't use the dedicated USB hub port power control GPIO
> to control the port VBUS supply. Instead host managed GPIOs are used to
> control the VBUS supply.
> 
> Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> ---
>  Documentation/devicetree/bindings/usb/usb-device.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/usb-device.yaml b/Documentation/devicetree/bindings/usb/usb-device.yaml
> index 09fceb469f10525e9dcdb91435b142b0d21964b8..2f891a05ab9bca095eb881c5f601ac27ac63b542 100644
> --- a/Documentation/devicetree/bindings/usb/usb-device.yaml
> +++ b/Documentation/devicetree/bindings/usb/usb-device.yaml
> @@ -53,6 +53,12 @@ properties:
>    "#size-cells":
>      const: 0
>  
> +  vbus-supply:
> +    description: USB hub port VBUS supply.
> +      The host managed regulator which controlls the USB hub port VBUS. This

controls

With that,

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

> +      regulator is only required if the hub internal control signals aren't
> +      used to control the VBUS regulators.
> +
>  patternProperties:
>    "^interface@[0-9a-f]{1,2}(,[0-9a-f]{1,2})$":
>      type: object
> 
> -- 
> 2.47.3
>