netdev - Re: [PATCH v3 2/3] dt-bindings: net: nxp,s32-dwmac: Use the GPR syscon

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Message-ID: <20260116175713.GA1801161-robh@kernel.org>
Date: Fri, 16 Jan 2026 11:57:13 -0600
From: Rob Herring <robh@...nel.org>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: Jan Petrous <jan.petrous@....nxp.com>, Frank Li <Frank.li@....com>,
	s32@....com, Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linaro-s32@...aro.org, imx@...ts.linux.dev
Subject: Re: [PATCH v3 2/3] dt-bindings: net: nxp,s32-dwmac: Use the GPR
 syscon

On Tue, Jan 13, 2026 at 05:13:32PM +0300, Dan Carpenter wrote:
> The S32 chipsets have a GPR region which has a miscellaneous registers
> including the GMAC_0_CTRL_STS register.  Originally, this code accessed
> that register in a sort of ad-hoc way, but it's cleaner to use a
> syscon interface to access these registers.
> 
> We still need to maintain the old method of accessing the GMAC register
> but using a syscon will let us access other registers more cleanly.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
> ---
> v3: Better documentation about what GMAC_0_CTRL_STS register does.
> v2: Add the vendor prefix to the phandle
>     Fix the documentation
> 
>  .../devicetree/bindings/net/nxp,s32-dwmac.yaml       | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
> index 2b8b74c5feec..cc0dd3941715 100644
> --- a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
> @@ -32,6 +32,17 @@ properties:
>        - description: Main GMAC registers
>        - description: GMAC PHY mode control register
>  
> +  nxp,phy-sel:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +      - description: phandle to the GPR syscon node
> +      - description: offset of PHY selection register

It should be:

items:
  - items:
      - description: ...
      - description: ...

Because it is 1 phandle+args entry of 2 cells.

Rob