linux-kernel - Re: [PATCH net-next V2 1/2] dt-bindings: net: xlnx,axi-ethernet: Modify descriptions and phy-mode value to support 2500base-X only configuration

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Message-ID: <20250312131734.GA505165-robh@kernel.org>
Date: Wed, 12 Mar 2025 08:17:34 -0500
From: Rob Herring <robh@...nel.org>
To: Suraj Gupta <suraj.gupta2@....com>
Cc: radhey.shyam.pandey@....com, andrew+netdev@...n.ch, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	krzk+dt@...nel.org, conor+dt@...nel.org, michal.simek@....com,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	git@....com, harini.katakam@....com
Subject: Re: [PATCH net-next V2 1/2] dt-bindings: net: xlnx,axi-ethernet:
 Modify descriptions and phy-mode value to support 2500base-X only
 configuration

On Wed, Mar 12, 2025 at 03:24:10PM +0530, Suraj Gupta wrote:
> AXI 1G/2.5G Ethernet subsystem supports 1G and 2.5G speeds. Modify
> existing binding description, pcs-handle description and add
> 2500base-x in phy-mode for 2500base-X only configuration.
> 
> Signed-off-by: Suraj Gupta <suraj.gupta2@....com>
> ---
>  .../devicetree/bindings/net/xlnx,axi-ethernet.yaml       | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/xlnx,axi-ethernet.yaml b/Documentation/devicetree/bindings/net/xlnx,axi-ethernet.yaml
> index fb02e579463c..977f55b98f31 100644
> --- a/Documentation/devicetree/bindings/net/xlnx,axi-ethernet.yaml
> +++ b/Documentation/devicetree/bindings/net/xlnx,axi-ethernet.yaml
> @@ -9,10 +9,12 @@ title: AXI 1G/2.5G Ethernet Subsystem
>  description: |
>    Also called  AXI 1G/2.5G Ethernet Subsystem, the xilinx axi ethernet IP core
>    provides connectivity to an external ethernet PHY supporting different
> -  interfaces: MII, GMII, RGMII, SGMII, 1000BaseX. It also includes two
> +  interfaces: MII, GMII, RGMII, SGMII, 1000BaseX and 2500BaseX. It also includes two

Please re-wrap at 80.

>    segments of memory for buffering TX and RX, as well as the capability of
>    offloading TX/RX checksum calculation off the processor.
>  
> +  AXI 2.5G MAC is incremental speed upgrade of AXI 1G and supports 2.5G speed.
> +
>    Management configuration is done through the AXI interface, while payload is
>    sent and received through means of an AXI DMA controller. This driver
>    includes the DMA driver code, so this driver is incompatible with AXI DMA
> @@ -62,6 +64,7 @@ properties:
>        - rgmii
>        - sgmii
>        - 1000base-x
> +      - 2500base-x
>  
>    xlnx,phy-type:
>      description:
> @@ -118,8 +121,8 @@ properties:
>      type: object
>  
>    pcs-handle:
> -    description: Phandle to the internal PCS/PMA PHY in SGMII or 1000Base-X
> -      modes, where "pcs-handle" should be used to point to the PCS/PMA PHY,
> +    description: Phandle to the internal PCS/PMA PHY in SGMII or 1000base-x/
> +      2500base-x modes, where "pcs-handle" should be used to point to the PCS/PMA PHY,

And here.

>        and "phy-handle" should point to an external PHY if exists.
>      maxItems: 1
>  
> -- 
> 2.25.1
>