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

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Date:   Sat, 18 Mar 2023 12:30:04 +0800
From:   Jacky Huang <ychuang570808@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        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

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.



>>> +
>>> +  '#reset-cells':
>>> +    const: 1
>>> +
>>> +required:
>>> +  - compatible
>>> +  - regmap
>>> +  - '#reset-cells'
>>> +
>>> +additionalProperties: false
>>> +
>>> +examples:
>>> +  # system reset controller node:
>>> +  - |
>>> +    #include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
>>> +
>>> +    sys: system-management@...60000 {
>>> +        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
>> And your patchset is not bisectable.... Test for bisectability before
>> sending.
> Ah, no, it's correct. I see the compatible in previous patch. You need
> to clearly describe the dependencies and merging strategy/requirements
> in cover letter.
>
> Best regards,
> Krzysztof

Sorry for the confusion.

I will add history to the cover letter.


Best regards,

Jacky Huang