linux-kernel - Re: [PATCH v2 1/2] dt-bindings: hwmon: Add max6639

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Date:   Mon, 24 Apr 2023 15:23:41 +0530
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Marcello Sylvester Bauer <sylv@...v.io>,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: hwmon: Add max6639

Hi Krzysztof,

On 24-04-2023 03:12 pm, Krzysztof Kozlowski wrote:
> On 24/04/2023 11:18, Naresh Solanki wrote:
> 
>>>> Changes in V2:
>>>> - Update subject
>>>> - Drop blank lines
>>>> ---
>>>>    .../bindings/hwmon/maxim,max6639.yaml         | 52 +++++++++++++++++++
>>>>    1 file changed, 52 insertions(+)
>>>>    create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
>>>> new file mode 100644
>>>> index 000000000000..1aaedfd7cee0
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
>>>> @@ -0,0 +1,52 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/hwmon/maxim,max6639.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Maxim max6639
>>>
>>> What is this device? fan controller?
>> Yes Fan controller.
>> Do you want me to update the title here as:
>> "Maxim MAC6639 2 channel fan controller & temperature monitor" ?
> 
> Enough would be:
> Maxim MAX6639 Fan Controller
Ack
> 
> 
>>
>>>
>>>> +
>>>> +maintainers:
>>>> +  - Naresh Solanki <Naresh.Solanki@...ements.com>
>>>> +
>>>> +description: |
>>>> +  The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM
>>>> +  fan-speed controller.  It monitors its own temperature and one external
>>>> +  diode-connected transistor or the temperatures of two external diode-connected
>>>> +  transistors, typically available in CPUs, FPGAs, or GPUs.
>>>> +
>>>> +  Datasheets:
>>>> +    https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    enum:
>>>> +      - maxim,max6639
>>>> +
>>>> +  reg:
>>>> +    maxItems: 1
>>>> +
>>>> +  '#address-cells':
>>>> +    const: 1
>>>> +
>>>> +  '#size-cells':
>>>> +    const: 0
>>>
>>> Why do you need these two properties?
>> Ack. Will remove them.
>>>
>>> Anyway, the binding looks incomplete. Where are the supplies? Interrupts?
>> This patch just adds basic support to the existing platform driver.
>> Intention is to be able to call the driver from DT with basic
>> initialization from driver the existing driver.
> 
> Bindings should be rather complete. Here the datasheet is accessible and
> few properties quite obvious, so I don't see a reason to skip them.
I agree with you. But currently the driver which is already merged 
doesn't has it implemented.
And will be working on separate patch to include this later.
> 
> 
> Best regards,
> Krzysztof
> 

Regards,
Naresh.