Re: [PATCH v3 1/3] dt-bindings: ata: eswin: Document for EIC7700 SoC ahci

[Krzysztof Kozlowski <krzk@kernel.org>]

On 04/09/2025 11:14, Niklas Cassel wrote:
> Hello Krzysztof, Rob,
> 
> On Thu, Sep 04, 2025 at 09:10:34AM +0200, Krzysztof Kozlowski wrote:
>>> +
>>> +  ports-implemented:
>>> +    const: 1
>>
>> I do not see how you addressed request about firmware. Nothing changed
>> here, no explanation in the commit msg.
> 
> In Yulin's defence, he did comment that when having the Ports Implemented
> register initialized by firmware, the Ports Implemented register apparently
> gets cleared to zero when rmmoding the driver (probably because it disables
> the clocks and regulators to the controller), thus this suggestion breaks
> the use case of being able to reload the driver (rmmod + insmod).
> 
> He mentioned this, and asked for advice here:
> https://lore.kernel.org/linux-ide/2cc9f2ff.6a2.198e04fd36e.Coremail.luyulin@eswincomputing.com/
> 
> After no reply he asked the same question again:
> https://lore.kernel.org/linux-ide/692e11ca.843.198f0337528.Coremail.luyulin@eswincomputing.com/
> 
> I assume that Rob simply missed those messages.
> 
> Anyway, I provided my 50 cents here:
> https://lore.kernel.org/linux-ide/aLBUC116MdJqDGIJ@flawful.org/
> 
> (I would like to add that I think it is the disabling of clocks and
> regulators that causes the register to be cleared, since we do call
> ahci_platform_assert_rsts() during the first probe, so if it was the reset
> that cleared the register, the first probe should also not have worked.)
> 
> 
> Not sure if it relevant to mention this reply to Rob's review comment in the
> commit message, but perhaps it should have been mentioned in the change log.

Reviewer questions for more serious stuff happen for a reason, so when
discussion is resolved somehow differently than reviewer suggested, it
pretty often deserves explanation in commit msg.

Well, in changelog as absolute minimum. No explanation happened here in
the changelog, nor in the commit msg.

Best regards,
Krzysztof