netdev - Re: [PATCH net-next v4 11/17] dt-bindings: net: pse-pd: Add another way of describing several PSE PIs

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Message-ID: <0d7b5549-f56b-4693-878f-e513fbf5ca16@linaro.org>
Date: Sat, 17 Feb 2024 15:01:55 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Kory Maincent <kory.maincent@...tlin.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Jonathan Corbet <corbet@....net>, Luis Chamberlain <mcgrof@...nel.org>,
 Russ Weight <russ.weight@...ux.dev>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Oleksij Rempel
 <o.rempel@...gutronix.de>, Mark Brown <broonie@...nel.org>,
 Frank Rowand <frowand.list@...il.com>, Andrew Lunn <andrew@...n.ch>,
 Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 devicetree@...r.kernel.org, Dent Project <dentproject@...uxfoundation.org>
Subject: Re: [PATCH net-next v4 11/17] dt-bindings: net: pse-pd: Add another
 way of describing several PSE PIs

On 15/02/2024 17:02, Kory Maincent wrote:
> PSE PI setup may encompass multiple PSE controllers or auxiliary circuits
> that collectively manage power delivery to one Ethernet port.
> Such configurations might support a range of PoE standards and require
> the capability to dynamically configure power delivery based on the
> operational mode (e.g., PoE2 versus PoE4) or specific requirements of
> connected devices. In these instances, a dedicated PSE PI node becomes
> essential for accurately documenting the system architecture. This node
> would serve to detail the interactions between different PSE controllers,
> the support for various PoE modes, and any additional logic required to
> coordinate power delivery across the network infrastructure.
> 
> The old usage of "#pse-cells" is unsuficient as it carries only the PSE PI
> index information.
> 
> This patch is sponsored by Dent Project <dentproject@...uxfoundation.org>.
> 
> Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>
> ---
> 
> Changes in v3:
> - New patch
> 
> Changes in v4:
> - Remove $def
> - Fix pairset-names item list
> - Upgrade few properties description
> - Update the commit message
> ---
>  .../bindings/net/pse-pd/pse-controller.yaml        | 84 +++++++++++++++++++++-
>  1 file changed, 81 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml b/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml
> index 2d382faca0e6..6f4faec216a5 100644
> --- a/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml
> +++ b/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml
> @@ -13,6 +13,7 @@ description: Binding for the Power Sourcing Equipment (PSE) as defined in the
>  
>  maintainers:
>    - Oleksij Rempel <o.rempel@...gutronix.de>
> +  - Kory Maincent <kory.maincent@...tlin.com>
>  
>  properties:
>    $nodename:
> @@ -22,11 +23,88 @@ properties:
>      description:
>        Used to uniquely identify a PSE instance within an IC. Will be
>        0 on PSE nodes with only a single output and at least 1 on nodes
> -      controlling several outputs.
> +      controlling several outputs which are not described in the pse_pis
> +      subnode. This property is deprecated, please use pse_pis instead.
>      enum: [0, 1]
>  
> -required:
> -  - "#pse-cells"
> +  pse_pis:

How did this appear here? Underscores are no allowed.

> +    type: object


Missing description.

> +
> +    properties:
> +      "#address-cells":
> +        const: 1
> +
> +      "#size-cells":
> +        const: 0
> +
> +    required:
> +      - "#address-cells"
> +      - "#size-cells"
> +
> +    patternProperties:

No underscores.

> +      "^pse_pi@[0-9a-f]+$":
> +        type: object
> +        description:
> +          PSE PI for power delivery via pairsets, compliant with IEEE
> +          802.3-2022, Section 145.2.4. Each pairset comprises a positive and
> +          a negative VPSE pair, adhering to the pinout configurations
> +          detailed in the standard.
> +          See Documentation/networking/pse-pd/pse-pi.rst for details.
> +
> +        properties:
> +          reg:
> +            description:
> +              Address describing the PSE PI index.
> +            maxItems: 1
> +
> +          "#pse-cells":
> +            const: 0
> +
> +          pairset-names:
> +            $ref: /schemas/types.yaml#/definitions/string-array
> +            description:
> +              Names of the pairsets as per IEEE 802.3-2022, Section 145.2.4.
> +              Valid values are "alternative-a" and "alternative-b". Each name
> +              should correspond to a phandle in the 'pairset' property
> +              pointing to the power supply for that pairset.
> +            minItems: 1
> +            maxItems: 2
> +            items:
> +              enum:
> +                - "alternative-a"
> +                - "alternative-b"

No need for quotes.

I believe you did not test it, so I will skip reviewing the rest.


Best regards,
Krzysztof