linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: Commonize IQ-X-IOT DTSI

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Message-ID: <gizxtjc2hia76qs37vl7atg5ixyk4fpr6qnwqlsajkddhxwb46@nyngnrdo5r57>
Date: Tue, 6 Jan 2026 05:26:47 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Tingwei Zhang <tingwei.zhang@....qualcomm.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
        Yijie Yang <yijie.yang@....qualcomm.com>, andersson@...nel.org,
        konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64: dts: qcom: Commonize IQ-X-IOT DTSI

On Tue, Jan 06, 2026 at 11:05:30AM +0800, Tingwei Zhang wrote:
> 
> 
> On 1/6/2026 9:47 AM, Dmitry Baryshkov wrote:
> > On Tue, Jan 06, 2026 at 09:24:38AM +0800, Tingwei Zhang wrote:
> >>
> >> On 1/5/2026 11:09 PM, Krzysztof Kozlowski wrote:
> >>> On 05/01/2026 06:36, Tingwei Zhang wrote:
> >>>> On 12/30/2025 3:21 PM, Krzysztof Kozlowski wrote:
> >>>>> On 29/12/2025 21:08, Dmitry Baryshkov wrote:
> >>>>>> On Mon, Dec 29, 2025 at 09:47:05AM +0100, Krzysztof Kozlowski wrote:
> >>>>>>> On 29/12/2025 08:38, Yijie Yang wrote:
> >>>>>>>> On 12/29/2025 3:21 PM, Krzysztof Kozlowski wrote:
> >>>>>>>>> On 29/12/2025 02:23, Tingwei Zhang wrote:
> >>>>>>>>>> On 12/24/2025 8:12 AM, Tingwei Zhang wrote:
> >>>>>>>>>>> On 12/23/2025 9:41 PM, Krzysztof Kozlowski wrote:
> >>>>>>>>>>>> On 23/12/2025 04:38, Tingwei Zhang wrote:
> >>>>>>>>>>>>> On 12/22/2025 5:11 PM, Krzysztof Kozlowski wrote:
> >>>>>>>>>>>>>> On Mon, Dec 22, 2025 at 02:03:28PM +0800, YijieYang wrote:
> >>> If this was the same SoM, just with different SoC soldered, it would
> >>> have the same PMICs. Different PMICs means different SoM...
> >> I agree. It's not same SoM, but they are very similar with same circuit board.
> >>> Anyway, I shared my opinion and I am not going to spend more time on
> >>> this. It should not be my task to go through schematics and prove that
> >>> PMICs differ. Authors should.
> >> We will make it more clear in the description about PMIC difference.
> >> Since we have the agreement that Hamoa/Purwa modules are very similar,
> >> we will use common dtsi in next version. Please let me know if you think
> >> that's not correct thing to do.
> > I think, you have been clearly told _not_ _to_. You have agreed that
> > they are not the same module. So, please stop.
> >
> From hardware side, I think we are on same page. Hamoa and Purwa modules
> are not same SoM, but they are very similar. The only difference is different
> SoC, PCI, APC supply and one PMIC. The circuit boards are same.
> We have exactly same case on Hamoa/Purwa CRD which uses a common
> dtsi.
> Can we use common dtsi for the hardware boards which are very similar?
> Is that very strict that the hardware boards have to be exactly same?

I don't have a very strict opinion about the shared DTSIs. However, I
really want to point out: you got an review comment that it is
unacceptable, you never got a comment that it's fine, nevertheless you
want to ignore that review comment, coming from DT bindings maintainer.
In 99% of the cases _ignoring_ the comment is a very wrong idea.

>From my PoV, asking to "Please let me know if you think that's not
correct thing to do." after you got all the previous emails is rude.

-- 
With best wishes
Dmitry