linux-kernel - Re: [PATCH 03/10] arm64: dts: qcom: Add a device tree for PMK8350 on SID6

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Date:   Fri, 11 Nov 2022 14:37:52 -0600
From:   Bjorn Andersson <andersson@...nel.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, agross@...nel.org,
        krzysztof.kozlowski@...aro.org, patches@...aro.org,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/10] arm64: dts: qcom: Add a device tree for PMK8350 on
 SID6

On Thu, Nov 10, 2022 at 12:12:19PM +0300, Dmitry Baryshkov wrote:
> On Wed, 9 Nov 2022 at 14:12, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
> >
> > PMK8350 is shipped on SID6 with some SoCs, for example with SM6375.
> > Add a DT with the SID changed to allow it to work.
> >
> > Unfortunately, the entire DT needs to be copied even if the diff is
> > very little, as the node names are not unique. Including pm6125 and
> > pmk8350 together for example, would make pmk8350 overwrite the pm6125
> > node, as both are defined as 'pmic@0'.
> >
> > Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> > ---
> >  arch/arm64/boot/dts/qcom/pmk8350_sid6.dtsi | 73 ++++++++++++++++++++++
> >  1 file changed, 73 insertions(+)
> >  create mode 100644 arch/arm64/boot/dts/qcom/pmk8350_sid6.dtsi
> 
> Just to throw my 2c. If I was doing this myself, I'd allow pmk8350 to
> receive external SID using the cpp #define (And to default to 0 if one
> didn't use it).
> 

I attempted this, for my four PM8150s in the SA8295P ADP.

Unfortunately it became quite messy due to the multiple SIDs, the fact
that all interrupts specifiers contains the SID, that the labels became
unreadable and the fact that there are label-based references within
each pmic.

But I like the idea!

Regards,
Bjorn