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Message-ID: <27d755b5-dd26-4bef-9d92-1633409e14fb@linaro.org>
Date: Wed, 10 Apr 2024 21:23:06 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Min Li <lnimi@...mail.com>, richardcochran@...il.com, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 netdev@...r.kernel.org, Min Li <min.li.xe@...esas.com>
Subject: Re: [PATCH net-next 1/1] dt-bindings: ptp: Add device tree binding
 for IDT FemtoClock

On 10/04/2024 20:41, Min Li wrote:
> From: Min Li <min.li.xe@...esas.com>
> 
> Add device tree binding doc for the IDT FemtoClock Frequency
> Clock Synthesizers.

A nit, subject: drop second/last, redundant "device tree binding for"
The "dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

> 
> Signed-off-by: Min Li <min.li.xe@...esas.com>
> ---
>  .../devicetree/bindings/ptp/ptp-idtfc3.yaml   | 47 +++++++++++++++++++

Filename based on compatible, e.g. idt,rc38xxx.yaml

>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/ptp/ptp-idtfc3.yaml
> 
> diff --git a/Documentation/devicetree/bindings/ptp/ptp-idtfc3.yaml b/Documentation/devicetree/bindings/ptp/ptp-idtfc3.yaml
> new file mode 100644
> index 000000000000..3e1c3135df5a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ptp/ptp-idtfc3.yaml
> @@ -0,0 +1,47 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ptp/ptp-idtfc3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: RENESAS FemtoClock (TM) Frequency Clock Synthesizers
> +
> +maintainers:
> +  - Min Li <min.li.xe@...esas.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      # For System Synchronizer
> +      - idt,rc38xxx0
> +      - idt,rc38xxx1
> +      - idt,rc38xxx2
> +      - idt,rc38xxx3
> +      - idt,rc38xxx4
> +      - idt,rc38xxx5
> +      - idt,rc38xxx6
> +      - idt,rc38xxx7
> +      - idt,rc38xxx8
> +      - idt,rc38xxx9

What are the "xxx"? Wild-cards? Are these compatible? Please read
writing-bindings.

> +
> +  reg:
> +    maxItems: 1
> +    description:
> +      I2C slave address of the device.

Drop description, it is redundant.

This looks quite incomplete. Why it cannot be part of existing idt binding?

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +	phc@9 { /* FemtoClock3 */

You have totally messed indentation. What's more, this was not tested.

What is "FemtoClock3" doing here? What is it exactly?

> +		compatible = "idt,rc38xxx0";
> +		reg = <0x9>;

What's more, where is any user of it? What's the point of adding binding
without any users? Please read submitting patches in DT bindings directory.

Best regards,
Krzysztof


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