From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9A61314A8E; Mon, 29 Dec 2025 08:47:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766998033; cv=none; b=jeHhy6ww8ardPW8gT6LW8WW57L+jTof5hUgdKHxEVlVsjHzSeyE+BslnW27l+th3j+mdfdGFQJuxv8MPAdpJ1xDCOTo82yWIEysNeBzx1npox1qGbF6j4pvYavgMrzuZRARSO54dQbRfyHhDyazGC6w4Q3cO2If7s50keR4fxVU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766998033; c=relaxed/simple; bh=rMatc21kl1ev6/k1ztoDMiHGAfiu1WB1G7lajpmWxFI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ugmKnpL8WbfWLlO6PcsnR2ApXSLi0SPzMY1ylbwHtaMU+kaJMpOPVeuI18zdH5ozoM6t5Dkbp8aPek/hgDAe4FXZgmV6fJ+BAndClrmHfLeqhC6Wb3DNvX1wZMTyJGh19p88/rGGJyAmsfm2EN+nx72dhopuipgLgU1H52edIOs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SQLqtw4w; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SQLqtw4w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D17C2C4CEF7; Mon, 29 Dec 2025 08:47:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1766998031; bh=rMatc21kl1ev6/k1ztoDMiHGAfiu1WB1G7lajpmWxFI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=SQLqtw4wqxe1Uw7gq8R9iagQKIU3D3NhTQwzevt9rg3APPyVBdnP5Fq0eAnxUas7O icoQzNH3Qln/F3w3Gvt+BQBzfVmlIU0am7I5RjLVWuh7FbzpDtVGgzppbkEKEaKkm1 8KMf5JfMsg+vuJ2WUpX5S6t3mO1nU8zAmWtrYtXkgQqUA35zVBuL5VKOcWF5pucAFF o1u1VpF2wkrGef43anNecTwATIGigVguE8Pi0cxuBkGP7SEChpGIG2kXmpVu1tqBjE QnMIK77lFDnn8sNW/shTJwqrsMFl6LRqMNPDAROxGYjbz85rbGgr0F/0E+iPaE1bHA OkUf4kzFMqwxw== Message-ID: Date: Mon, 29 Dec 2025 09:47:05 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/4] arm64: dts: qcom: Commonize IQ-X-IOT DTSI To: Yijie Yang , Tingwei Zhang Cc: andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20251222-purwa-v1-0-14ab9316e5ff@oss.qualcomm.com> <20251222060335.3485729-3-yijie.yang@oss.qualcomm.com> <20251222-fluorescent-turkey-of-gallantry-df0906@quoll> <6421f044-2b07-4518-9edc-b9b2ef49f4fb@kernel.org> <8bcf058f-5bf9-46ce-a188-e94954101f2f@oss.qualcomm.com> <4f79d090-7d1c-4fb3-a835-a7e4ff96f79c@oss.qualcomm.com> <448f2efa-5b1e-4855-a62d-2e375938b36f@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit 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: >>>>>>>> From: Yijie Yang >>>>>>>> >>>>>>>> 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 >> >> It's not the same PCB. You did not really respond to my first message, >> so I responded to you - I do not speak about boards. Then again you did >> not respond to it and brought some irrelevant arguments. >> >>> would reduce maintenance effort. >> >> Does not matter, I do not question this. Why are you responding to some >> questions which were never asked? >> >> DTSI represents actual shared physical aspect and you cannot share SoM >> physically. It's not the same PCB, because you do not have a socket on >> the SoM. > > x1e80100-crd and x1p42100-crd are different boards, yet they share the > same x1-crd.dtsi. Why can’t we apply the same approach here? You should ask the authors there, not me. I presume that the baseboard is the same or very similar. Or pieces of the baseboard are re-used which could be visible in the schematics (same MCN numbers etc). Best regards, Krzysztof