linux-kernel - Re: [RFC PATCH 2/2] arm64: dts: qcom: qcm6490: Add qcm6490 idp and rb3 board

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Date:   Mon, 6 Nov 2023 14:05:14 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Mukesh Ojha <quic_mojha@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Komal Bajaj <quic_kbajaj@...cinc.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_nainmeht@...cinc.com
Subject: Re: [RFC PATCH 2/2] arm64: dts: qcom: qcm6490: Add qcm6490 idp and
 rb3 board

On 06/11/2023 12:41, Mukesh Ojha wrote:

>> I agree here. What exactly is common in the real hardware between IDP
>> and RB3? Commit msg does not explain it, so I do not see enough
>> justification for common file. Just because some DTS looks similar for
>> different hardware does not mean you should creat common file.
> 
> @Dmitry/@...ysztof,
> 
> Thank you for reviewing the RFC, we wanted to continue the
> suggestion/discussion given on [1] , where we discussed that this
> qcm6490 is going to be targeted for IOT segment and will have different
> memory map and it is going to use some of co-processors like adsp/cdsp 
> which chrome does not use.
> 
> So to your question what is common between RB3 and IDP, mostly they will
> share common memory map(similar to [2]) and regulator settings and both

The question was what is common hardware, not common in your DTS.


> will use adsp/cdsp etc., we will be posting the memory map changes as 
> well in coming weeks once this RFC is acked.

Sorry, that's not common part of hardware.

Best regards,
Krzysztof