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 5171F1662FD; Mon, 19 Aug 2024 11:00:21 +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=1724065221; cv=none; b=VunjOFTJ4K74zx70EK156QShp1sjVz13kEtfnle5+NQHN5MJlr47ym40pS4DatRQQuka+dAbX+YKYBOL6OeyKpN1+XQ8W8Mmpfc0o3Q6s3BhXmMESY87V75EGnMl+iR4RC28cbZhhudH+BppO5dXMAZheO7ZBt/aOAXsgK0smKk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724065221; c=relaxed/simple; bh=XBHMEEhPwfwJ6wJsTcFGmgfYvxnXBbLVl1ivyet5cGc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=A3brgPOeszwW6AhVPJbn54UCDxXHyqAzgvHsA/ifmTsqFxPScxKGuFFjq6aiijquf1xlZ3Y9rk22MwA0eIj7foFd//eTL5Lrc73yNfnzYJzaeA0NBKM4nLFDsuSHpXPdrEAlGvFfo8kIxVIRDw7Gm1v3ccNzr6FolvtFga6/1cI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SUJoPjQx; 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="SUJoPjQx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58FFFC4AF0C; Mon, 19 Aug 2024 11:00:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724065220; bh=XBHMEEhPwfwJ6wJsTcFGmgfYvxnXBbLVl1ivyet5cGc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=SUJoPjQxJkRWQDMdbqsd8ljreSfbs4lLEHRNErvO2OGQb6MYc9hvSstcGaR7Ih75I 1ghZ+Ztz2eyERrQve6KZTnO5jXonKCuPpHjEgVD2isH9MmMUMAB0Y+psA1rAI6dJzv 6iCxl7WiYYu1P+830qHbNz+UoqE0zbPe56O/VUGbDbOOwMfkY1b1YdmVHu37yvV3Mn Bwg5PJkOKuyIpVnWMsiquBUzTjo7ZZkcKhcZq2C/VYDi/KUk1erKrc+bkMgvg/d1Sv vtccfdM0a8obf9+ELr4gVjUJLVFn0CKbXmE3C+JzXrYKhINTOtUWKbT1JuO9ftXMSu HdiWT9BhcCczA== Message-ID: <9fce86a4-fadd-43cc-ab99-8524a6396d1e@kernel.org> Date: Mon, 19 Aug 2024 13:00:14 +0200 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/4] arm64: dts: qcom: sa8775p-ride: Add QCS9100 compatible To: "Aiqun Yu (Maria)" , Tingwei Zhang , Tengfei Fan , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: kernel@quicinc.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20240806-add_qcs9100_soc_id-v1-0-04d14081f304@quicinc.com> <20240806-add_qcs9100_soc_id-v1-4-04d14081f304@quicinc.com> <90eae361-7d5d-440f-a85d-dfd81b384fe7@kernel.org> <4a350e94-3c95-48e1-9ea8-ced483c1aa45@quicinc.com> <14ec06bd-0c27-4930-8bce-d3f5b68067ed@kernel.org> <9323127a-e6b5-4835-afa0-4ce0086fd9d1@kernel.org> <0d1c44b9-3d5f-4d93-af64-1756e52f4fe3@quicinc.com> <47c966c7-8736-44a2-8ec7-4d7989efa9cd@kernel.org> <72b2d710-a7cb-45cf-9dad-e9fbd876697b@quicinc.com> <2229cc1a-0fa0-4291-874e-43b31f82ef50@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 13/08/2024 10:59, Aiqun Yu (Maria) wrote: >>>>>> Does "new board" mean that "old board" disappears? No users to care >>>>>> about it? Or just the existing board is being changed (like new revision)? >>>>> >>>>> We will support both boards. Sa8775p-ride board with sa8775p chipset and >>>>> sa8775p-ride board with qcs9100 chipset. Both of them can be used for >>>>> development. >>>> >>>> Patch does something else then - changes compatibles for the existing >>>> (old) board. >>> >>> Can you educate us the right way to add the qcs9100 SoC support in >>> sa8775p-ride board? We don't want to duplicate whole device tree file >>> since all the hardwares are same except the SoC, so we add qcs9100 SoC >>> compatible to sa8775p-ride board and still keep sa8775p SoC compatible. >> >> Split board DTS into shared DTSI (just don't forget about proper >> -M/-C/-B arguments for format-patch) and include it in relevant boards. >> You also need new SoC DTSI. This will be unusual code, but it matches >> what you want to achieve. > > If we create two additional DTSs, a total of four DTBs will be generated. > Should we update the current board DTSs (sa8775p-ride-r3.dts and > sa8775p-ride.dts) to support the pin-to-pin compatible QCS9100 and > SA8775p SoCs? I don't know, I don't have such device. Decision should be based on real life, real events happening, real products, not on feelings. > > Considering the higher usage of QCS9100 boards in IoT compared to > SA8775p in automotive for these DTBs, perhaps we should prioritize the > 'qcom,qcs9100' compatibility before 'qcom,sa8775p'. Prioritize in what way? What does it mean? Best regards, Krzysztof