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

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Message-ID: <4f79d090-7d1c-4fb3-a835-a7e4ff96f79c@oss.qualcomm.com>
Date: Mon, 29 Dec 2025 09:23:32 +0800
From: Tingwei Zhang <tingwei.zhang@....qualcomm.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        YijieYang <yijie.yang@....qualcomm.com>
Cc: 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 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:
>>>>> From: Yijie Yang <yijie.yang@....qualcomm.com>
>>>>>
>>>>> HAMOA-IOT-EVK and PURWA-IOT-EVK share a similar board design. Extract
>>>>> the common components into separate files for better maintainability.
>>>> SoMs do not share actual hardware. DTSI does not represent what looks
>>>> similar to you, but actually common parts.
>>> Purwa SOM board and Hamoa SOM board share same design. They share same PCB.
>>> The difference is only on chip. Purwa SOM board has Purwa and Hamoa SOM board
>>> has Hamoa on it. 
>> I do not speak about boards. Read carefully feedback and respond to the
>> actual feedback, not some other arguments.
>>
>> NAK
> In this change, the SoM hardware except SoC is described by iq-x-iot-som.dtsi since it's common between Hamoa and Purwa. Hamoa and Purwa SoC hardware is described in hamoa.dtsi and purwa.dtsi. Hamoa-iot-som.dtsi includes iq-x-iot-som.dtsi and hamoa.dtsi. This change could reduce the duplicate code and review effort on a totally new purwa-iot-som.dtsi. If we found any bug, it can be fixed in one common file instead of two separate files. Same idea is used in x1-crd.dtsi. X1e80100-crd.dts include x1-crd.dtsi and hamoa.dtsi.
Krzysztof,
Please let me know your opinion on this. This could be a common case for
Hamoa/Purwa boards share same PCB. Share same dtsi file like x1-crd.dtsi
would reduce maintenance effort.
>> Best regards,
>> Krzysztof