linux-kernel - Reusing DTS from arm64 to arm

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Date:   Tue, 24 Nov 2020 10:57:01 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Olof Johansson <olof@...om.net>, Rob Herring <robh+dt@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org
Subject: Reusing DTS from arm64 to arm

Hello Olof, Rob,

We have Qualcomm arm platform which uses PMIC PM8150B. This PMIC was
also used in SM8150 board and is already upstream [1] but in arm64.

So, what is the guidance to share DTS files between 32 and 64 variants?
Does a solution already exist which I may not be aware of..?

I can think of following options for this, in case we dont have a
solution:

1. Hack up arm include paths to also include arm64 path so that we can
share DTS

2. Use relative path of arm64 directory and include that (seems not
great to look at)

3. Copy the file (simplest but least preferred)

Or is there a better idea to solve this...?

[1]: arch/arm64/boot/dts/qcom/pm8150b.dtsi

Thanks
-- 
~Vinod

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