linux-kernel - Re: [PATCH 09/15] dt-bindings: reset: Document ma35d1 reset controller bindings

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Date:   Sun, 19 Mar 2023 12:05:16 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jacky Huang <ychuang570808@...il.com>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, lee@...nel.org,
        mturquette@...libre.com, sboyd@...nel.org, p.zabel@...gutronix.de,
        gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc:     devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        schung@...oton.com, Jacky Huang <ychuang3@...oton.com>
Subject: Re: [PATCH 09/15] dt-bindings: reset: Document ma35d1 reset
 controller bindings

On 18/03/2023 05:30, Jacky Huang wrote:
> Dear Krzysztof,
> 
> 
> Thanks for your advice.
> 
> 
> On 2023/3/16 下午 03:39, Krzysztof Kozlowski wrote:
>> On 16/03/2023 08:37, Krzysztof Kozlowski wrote:
>>> On 15/03/2023 08:28, Jacky Huang wrote:
>>>> From: Jacky Huang <ychuang3@...oton.com>
>>>>
>>>> Add documentation to describe nuvoton ma35d1 reset driver bindings.
>>> Subject: drop second/last, redundant "bindings". The "dt-bindings"
>>> prefix is already stating that these are bindings.
> 
> 
> OK, I will fix it.
> 
> 
>>>> Signed-off-by: Jacky Huang <ychuang3@...oton.com>
>>>> ---
>>>>   .../bindings/reset/nuvoton,ma35d1-reset.yaml  | 50 +++++++++++++++++++
>>>>   1 file changed, 50 insertions(+)
>>>>   create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>>>> new file mode 100644
>>>> index 000000000000..f66c566c6dce
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>>>> @@ -0,0 +1,50 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/reset/nuvoton,ma35d1-reset.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Nuvoton MA35D1 Reset Controller
>>>> +
>>>> +maintainers:
>>>> +  - Chi-Fang Li <cfli0@...oton.com>
>>>> +  - Jacky Huang <ychuang3@...oton.com>
>>>> +
>>>> +description:
>>>> +  The system reset controller can be used to reset various peripheral
>>>> +  controllers in MA35D1 SoC.
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    const: nuvoton,ma35d1-reset
>>>> +
>>>> +  regmap:
>>>> +    $ref: /schemas/types.yaml#/definitions/phandle
>>>> +    description: Phandle to the register map node.
>>> You need to be specific what is this. As you can easily check, there is
>>> no such property in any devices. I don't understand why do you need it
>>> in the first place.
> 
>          reset: reset-controller {
>              compatible = "nuvoton,ma35d1-reset";
>              regmap = <&sys>;
>              #reset-cells = <1>;
>          };
> 
> The dt_binding_check check report an error about the above "regmap".
> 
> I found that add this can pass the test.

Do not add properties to bindings to "pass the test". That's not the
goal of bindings. Add there properties because they make sense...

Anyway, you did not answer my question at all. So one by one - address them:
1. As you can easily check, there is no such property in any devices.
Explanation: do you see it anywhere in existing bindings?

2. I don't understand why do you need it in the first place.
Explanation: your binding suggest this is not needed. If you think
otherwise, you need to provide rationale.



Best regards,
Krzysztof