Subject: Re: [PATCH net-next v3 14/17] dt-bindings: net: pse-pd: Add bindings for PD692x0 PSE controller

From: Rob Herring <[email-masked]>
Date: Fri, 9 Feb 2024 14:57:27 +0000

On Thu, Feb 08, 2024 at 02:08:51PM +0100, Kory Maincent wrote:
> Add the PD692x0 I2C Power Sourcing Equipment controller device tree
> bindings documentation.
> 
> Sponsored-by: Dent Project <[email-masked]>
> Signed-off-by: Kory Maincent <[email-masked]>
> ---
> 
> Changes in v2:
> - Enhance ports-matrix description.
> - Replace additionalProperties by unevaluatedProperties.
> - Drop i2c suffix.
> 
> Changes in v3:
> - Remove ports-matrix parameter.
> - Add description of all physical ports and managers.
> - Add pse_pis subnode moving to the API of pse-controller binding.
> - Remove the MAINTAINERS section for this driver as I will be maintaining
>   all pse-pd subsystem.
> ---
>  .../bindings/net/pse-pd/microchip,pd692x0.yaml     | 157 +++++++++++++++++++++
>  1 file changed, 157 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/pse-pd/microchip,pd692x0.yaml b/Documentation/devicetree/bindings/net/pse-pd/microchip,pd692x0.yaml
> new file mode 100644
> index 000000000000..57ba5365157c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/pse-pd/microchip,pd692x0.yaml
> @@ -0,0 +1,157 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/pse-pd/microchip,pd692x0.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip PD692x0 Power Sourcing Equipment controller
> +
> +maintainers:
> +  - Kory Maincent <[email-masked]>
> +
> +allOf:
> +  - $ref: pse-controller.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,pd69200
> +      - microchip,pd69210
> +      - microchip,pd69220
> +
> +  reg:
> +    maxItems: 1
> +
> +  managers:
> +    $ref: "#/$defs/managers"
> +    description:
> +      List of the PD69208T4/PD69204T4/PD69208M PSE managers. Each manager
> +      have 4 or 8 physical ports according to the chip version. No need to
> +      specify the SPI chip select as it is automatically detected by the
> +      PD692x0 PSE controller. The PSE managers have to be described from
> +      the lowest chip select to the greatest one, which is the detection
> +      behavior of the PD692x0 PSE controller. The PD692x0 support up to
> +      12 PSE managers which can expose up to 96 physical ports. All
> +      physical ports available on a manager have to be described in the
> +      incremental order even if they are not used.

Looks to me like you just need 3 PSE cells: <manager> <port> <A|B>

Really, no need for each piece of data to its own cell, so it could be 
merged into 1 or 2 cells.

But cell data is generally supposed to be meaningful to the provider and 
opaque to the consumer. It's not clear to me who needs to know 
alternative A vs. B. That seems more like a property of the PHY than the 
power provider? 

Rob