linux-kernel - RE: [PATCH v3 2/5] dt-bindings: mfd: Add ADI MAX77541/MAX77540

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Date:   Wed, 1 Feb 2023 07:46:59 +0000
From:   "Sahin, Okan" <Okan.Sahin@...log.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Caleb Connolly <caleb.connolly@...aro.org>,
        Marcus Folkesson <marcus.folkesson@...il.com>,
        "Bolboaca, Ramona" <Ramona.Bolboaca@...log.com>,
        William Breathitt Gray <william.gray@...aro.org>,
        ChiYuan Huang <cy_huang@...htek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>
Subject: RE: [PATCH v3 2/5] dt-bindings: mfd: Add ADI MAX77541/MAX77540

>> On Wed, 1 Feb 2023 10:26 AM
>> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

>On 31/01/2023 22:28, Sahin, Okan wrote:
>> On Tue, 31 Jan 2023 7:44 PM
>> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
>>
>>> On 31/01/2023 13:02, Sahin, Okan wrote:
>>>>>> +  regulators:
>>>>>> +    $ref: /schemas/regulator/adi,max77541-regulator.yaml#
>>>>>
>>>>> No improvements regarding bisectability - this patch fails. If you
>>>>> tested this patch, you would see it.
>>>>>
>>>>> Instead of ignoring comments, either implement them or ask for
>clarification.
>>>>>
>>>>>
>>>> Sorry for misunderstanding, I checked patchset as a whole not one by
>>>> one this is
>>> why I did not get failure after "make dt_binding_check " . Right now,
>>> I understand why you are saying this patch fails, but what is your
>>> suggestion?  what is the correct order for this patchset? I sent adi,max77541-
>regulator.yaml in path 4/5.
>>> In the light of discussion, should I remove all the parts related to
>>> regulator in patch 2/5, then add adi,max77541-regulator.yaml and
>>> update adi,max77541.yaml in patch 4/5? or should I add new patch to
>>> update adi,max77541.yaml?
>>>
>>> Regulator binding patch should be first in the series (bindings are
>>> before usage), then the MFD binding should come. Your cover letter
>>> should clearly at the top mention the dependency. You can also
>>> mention dependency in MFD patch after -- -, because many of us do not really
>read cover letters...
>>>
>>>
>>> Best regards,
>>> Krzysztof
>> Hi Krzysztof,
>>
>> Thank you for your feedback. I tried to explain in cover letter
>> .However, I understand that it was not clear enough. I do not want to take your
>time, but let me ask one thing to understand the case completely. Right now, my
>order is like below [cover letter]->[mfd driver]->[mfd binding]->[regulator driver]-
>>[regulator binding]->[adc].
>> Should I completely change the ordering  e.g. starting with regulator ending
>with mfd or is it sufficient to just get the regulator binding just before the mfd
>bindings?
>
>"bindings are before usage" - what's unclear?
>
>How can you use binding before defining it?
>
>Best regards,
>Krzysztof

Hi Krysztof,

It is crystal clear that "bindings are before usage", but what I want to know is what is the correct order of patchset for mfd device? Max77541 is multi-functional device. It has both adc and regulator subdevices. I thought I need to put mfd driver first, yet it looks wrong to me right now? 

Regards,
Okan