linux-hardening - Re: [PATCH v3 05/12] dt-bindings: phy: renesas,usb2-phy: Add renesas,sysc-signals

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Message-ID: <20250522-evasive-unyielding-quoll-dbc9b2@kuoka>
Date: Thu, 22 May 2025 09:03:41 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Claudiu <claudiu.beznea@...on.dev>
Cc: vkoul@...nel.org, kishon@...nel.org, robh@...nel.org, 
	krzk+dt@...nel.org, conor+dt@...nel.org, p.zabel@...gutronix.de, 
	geert+renesas@...der.be, magnus.damm@...il.com, yoshihiro.shimoda.uh@...esas.com, 
	kees@...nel.org, gustavoars@...nel.org, biju.das.jz@...renesas.com, 
	linux-phy@...ts.infradead.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, linux-hardening@...r.kernel.org, john.madieu.xa@...renesas.com, 
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v3 05/12] dt-bindings: phy: renesas,usb2-phy: Add
 renesas,sysc-signals

On Wed, May 21, 2025 at 05:09:36PM GMT, Claudiu wrote:
>  .../bindings/phy/renesas,usb2-phy.yaml        | 22 +++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> index 12f8d5d8af55..e1e773cba847 100644
> --- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> @@ -86,6 +86,16 @@ properties:
>  
>    dr_mode: true
>  
> +  renesas,sysc-signals:
> +    description: System controller phandle, specifying the register
> +      offset and bitmask associated with a specific system controller signal

This is 100% redundant information. system controller specifying system
controller signal.

Drop.


> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +      - items:
> +          - description: system controller phandle

What for? Explain the usage. How is ut used by this hardware.

> +          - description: register offset associated with a signal

What signal? That's a phy.

> +          - description: register bitmask associated with a signal
> +
>  if:
>    properties:
>      compatible:
> @@ -117,6 +127,18 @@ allOf:
>        required:
>          - resets
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: renesas,usb2-phy-r9a08g045
> +    then:
> +      required:
> +        - renesas,sysc-signals

That's ABI break.

Best regards,
Krzysztof