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

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Message-ID: <3f3dfd39-2cd1-4b03-8632-2c9d15b0bc2e@oss.qualcomm.com>
Date: Tue, 6 Jan 2026 11:05:30 +0800
From: Tingwei Zhang <tingwei.zhang@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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 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?