linux-kernel - Re: [PATCH 1/2] dt-bindings: phy: spacemit: add regulator support to K1 USB2 PHY

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Message-ID: <20260207115551-GYA130548@gentoo.org>
Date: Sat, 7 Feb 2026 19:55:51 +0800
From: Yixun Lan <dlan@...too.org>
To: Chukun Pan <amadeus@....edu.cn>
Cc: Yixun Lan <dlan@...nel.org>, Vinod Koul <vkoul@...nel.org>,
	Ze Huang <huang.ze@...ux.dev>, Rob Herring <robh@...nel.org>,
	Mark Brown <broonie@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	linux-riscv@...ts.infradead.org, linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	spacemit@...ts.linux.dev
Subject: Re: [PATCH 1/2] dt-bindings: phy: spacemit: add regulator support to
 K1 USB2 PHY

Hi Chukun,

On 18:00 Fri 06 Feb     , Chukun Pan wrote:
> Add an optional phy-supply property to describe the regulator
> supplying for USB VBUS.
> 
No, the phy itself doesn't require regulator supply

We previously had a discussion about this, and I personally agree it 
should be handled at USB port level, see Ze's comment

https://lore.kernel.org/all/aWJAT3n_KcND8bOz@monica.localdomain/

> Signed-off-by: Chukun Pan <amadeus@....edu.cn>
> ---
>  Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
> index 43eaca90d88c..74a1cd5bcdbe 100644
> --- a/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
> @@ -19,6 +19,10 @@ properties:
>    clocks:
>      maxItems: 1
>  
> +  phy-supply:
> +    description:
> +      Phandle to a regulator that provides power to VBUS.
> +
>    "#phy-cells":
>      const: 0
>  
> -- 
> 2.34.1
> 

-- 
Yixun Lan (dlan)