Subject: Re: [net-next PATCH v12 03/13] dt-bindings: net: dsa: Document support for Airoha AN8855 DSA Switch

From: Rob Herring <[email-masked]>
Date: Tue, 11 Mar 2025 14:20:19 -0500

On Sun, Mar 09, 2025 at 06:26:48PM +0100, Christian Marangi wrote:
> Document support for Airoha AN8855 5-port Gigabit Switch.
> 
> It does expose the 5 Internal PHYs on the MDIO bus and each port
> can access the Switch register space by configurting the PHY page.
> 
> Each internal PHY might require calibration with the fused EFUSE on
> the switch exposed by the Airoha AN8855 SoC NVMEM.
> 
> Signed-off-by: Christian Marangi <[email-masked]>
> ---
>  .../net/dsa/airoha,an8855-switch.yaml         | 105 ++++++++++++++++++
>  MAINTAINERS                                   |   1 +
>  2 files changed, 106 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
> new file mode 100644
> index 000000000000..63bcbebd6a29
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/dsa/airoha,an8855-switch.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Airoha AN8855 Gigabit Switch
> +
> +maintainers:
> +  - Christian Marangi <[email-masked]>
> +
> +description: >
> +  Airoha AN8855 is a 5-port Gigabit Switch.
> +
> +  It does expose the 5 Internal PHYs on the MDIO bus and each port
> +  can access the Switch register space by configurting the PHY page.
> +
> +  Each internal PHY might require calibration with the fused EFUSE on
> +  the switch exposed by the Airoha AN8855 SoC NVMEM.
> +
> +$ref: dsa.yaml#

This needs to be:

dsa.yaml#/$defs/ethernet-ports

As that restricts custom properties.

> +
> +properties:
> +  compatible:
> +    const: airoha,an8855-switch
> +
> +  reset-gpios:
> +    description:
> +      GPIO to be used to reset the whole device
> +    maxItems: 1
> +
> +  airoha,ext-surge:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      Calibrate the internal PHY with the calibration values stored in EFUSE
> +      for the r50Ohm values.

Should you be using nvmem binding to the efuse block? Or the efuses are 
within this block?

> +
> +required:
> +  - compatible
> +
> +unevaluatedProperties: false