netdev - Re: [PATCH net-next 4/4] dt-bindings: net: marvell10g: Document LED polarity

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Date: Fri, 15 Dec 2023 09:47:15 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Tobias Waldekranz <tobias@...dekranz.com>, davem@...emloft.net,
 kuba@...nel.org
Cc: linux@...linux.org.uk, kabel@...nel.org, andrew@...n.ch,
 hkallweit1@...il.com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org, netdev@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] dt-bindings: net: marvell10g: Document LED
 polarity

On 14/12/2023 21:14, Tobias Waldekranz wrote:
> Hardware supports multiple ways of driving attached LEDs, but this is
> not configurable via any sample-at-reset pins - rather it must be set
> via software.
> 
> Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
> ---
>  .../bindings/net/marvell,marvell10g.yaml      | 60 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/marvell,marvell10g.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/marvell,marvell10g.yaml b/Documentation/devicetree/bindings/net/marvell,marvell10g.yaml
> new file mode 100644
> index 000000000000..37ff7fdfdd3d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/marvell,marvell10g.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/marvell,marvell10g.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell Alaska X 10G Ethernet PHY
> +
> +maintainers:
> +  - Tobias Waldekranz <tobias@...dekranz.com>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  Bindings for Marvell Alaska X 10G Ethernet PHYs

Drop Bindings for and describe the hardware. You are repeating title, so
it is useless.

> +
> +allOf:
> +  - $ref: ethernet-phy.yaml#
> +
> +properties:

How is this schema selected/applied? I guess you have exactly the same
problem as recently talked about other ethernet PHY bindings.

See:
https://lore.kernel.org/linux-devicetree/20231209014828.28194-1-ansuelsmth@gmail.com/

> +  leds:
> +    type: object
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +
> +      '#size-cells':
> +        const: 0
> +
> +    patternProperties:
> +      '^led@[a-f0-9]+$':
> +        $ref: /schemas/leds/common.yaml#

Are you sure you need to repeat all this?

> +
> +        properties:
> +          marvell,polarity:
> +            description: |
> +              Electrical polarity and drive type for this LED. In the
> +              active state, hardware may drive the pin either low or
> +              high. In the inactive state, the pin can either be
> +              driven to the opposite logic level, or be tristated.
> +            $ref: /schemas/types.yaml#/definitions/string
> +            enum:
> +              - active-low
> +              - active-high
> +              - active-low-tristate
> +              - active-high-tristate
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    mdio {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        ethernet-phy@0 {
> +            reg = <0>;
> +
> +            marvell,polarity = "active-low-tristate";

It is clearly visible here that your schema is an no-op. You do not
allow such property in the phy, but in leds!



Best regards,
Krzysztof