linux-kernel - Re: [PATCH v2 2/4] dt-bindings: hwmon/pmbus: Add mps,mpq7932 power-management IC

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Date:   Thu, 1 Dec 2022 07:37:55 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Saravanan Sekar <saravanan@...umiz.com>
Cc:     linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, marten.lindahl@...s.com,
        jdelvare@...e.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH v2 2/4] dt-bindings: hwmon/pmbus: Add mps,mpq7932
 power-management IC

On 12/1/22 03:38, Krzysztof Kozlowski wrote:
> On 01/12/2022 12:29, Saravanan Sekar wrote:
>> On 01/12/22 11:26, Krzysztof Kozlowski wrote:
>>> On 01/12/2022 05:46, Saravanan Sekar wrote:
>>>> Document mpq7932 power-management IC
>>>>
>>>> Signed-off-by: Saravanan Sekar <saravanan@...umiz.com>
>>>> ---
>>>
>>> This is a friendly reminder during the review process.
>>>
>>> It seems my previous comments were not fully addressed. Maybe my
>>> feedback got lost between the quotes, maybe you just forgot to apply it.
>>> Please go back to the previous discussion and either implement all
>>> requested changes or keep discussing them.
>>>
>> Hi Krzysztof,
>>
>> Thanks for your time to review and feedback.
>>
>> Here are the summary of comments on V1, I have fixed all according to my
>> understanding.
>>
>>
>> 1. Use subject prefixes matching the subsystem (git log --oneline -- ...).
>>
>> git log --oneline -- Documentation/devicetree/bindings/hwmon/pmbus/
>> 1ccca53618c4 dt-bindings: hwmon/pmbus: Add mps,mpq7932 power-management IC
>> 373c0a77934c dt-bindings: hwmon/pmbus: Add ti,lm25066 power-management IC
>> 7f464532b05d dt-bindings: Add missing 'additionalProperties: false'
>> 8a36e38d8b0f dt-bindings: hwmon/pmbus: Add ti,ucd90320 power sequencer
>>
>> I have used the same format of 373c0a77934c.
>>
>> 2. Does not look like you tested the bindings. Please run `make
>> dt_binding_check` (see
>> Documentation/devicetree/bindings/writing-schema.rst for instructions).
>>
>> I did run dt_binding_check on V1 but failed to notice warnings. Fixed
>> warning on V2 and didn't observed any warnings.
>>
>> 3. Why requiring nodename? Device schemas usually don't do that.
>> dropped "pattern: "pmic@[0-9a-f]{1,2}""
>>
>> 4. regulators node is a regulator with one more regulator? Drop.
>> dropped "$ref: regulator.yaml# "
> 
> The comment was - drop entire regulators node.
> 
> Plus additional comment for the driver (and related to bindings) was
> that this is not hwmon but a regulator driver. Why putting regulator
> driver in hwmon?
> 

Turns out this is primarily a hardware monitoring driver, like the drivers
for all other PMBus chips. Regulator support is actually optional; the driver
works perfectly well with CONFIG_REGULATOR=n (except that it needs some
#ifdefs to address that situation).

Guenter