linux-kernel - Re: [PATCH v3 08/21] dt-bindings: phy: renesas,usb2-phy: Document mux-states property

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Message-ID: <20251110-outshine-smartly-881d231d644b@spud>
Date: Mon, 10 Nov 2025 18:54:35 +0000
From: Conor Dooley <conor@...nel.org>
To: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
Cc: tomm.merciai@...il.com, linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com, Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Peter Rosin <peda@...ntia.se>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 08/21] dt-bindings: phy: renesas,usb2-phy: Document
 mux-states property

On Mon, Nov 10, 2025 at 01:08:08PM +0100, Tommaso Merciai wrote:
> Some Renesas SoCs, such as RZ/G3E, provide a USB2.0 OTG PHY with
> configurable VBUS control through a multiplexed hardware register.
> This register allows selecting the VBUS source via a mux control
> line exposed by the PHY.
> 
> To represent this hardware configuration, support the standard
> `mux-states` property in the Renesas USB2 PHY binding.
> This allows the DeviceTree to model the VBUS source selection as
> a mux, consistent with generic binding conventions.
> 
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
> ---
> v2->v3:
>  - Improved commit body.
>  - Improved mux-states description.
> 
> v1->v2:
>  - New patch
> 
>  Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> index 2cd0efa75f81..448da30757f2 100644
> --- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> @@ -102,6 +102,11 @@ properties:
>  
>    dr_mode: true
>  
> +  mux-states:
> +    description:
> +      phandle to a mux controller node that select the source for USB VBUS.
> +    maxItems: 1

Acked-by: Conor Dooley <conor.dooley@...rochip.com>
pw-bot: not-applicable

> +
>  if:
>    properties:
>      compatible:
> -- 
> 2.43.0
> 

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