linux-kernel - Re: [PATCH v4 01/12] dt-bindings: iio: qcom: adc7-pm8350: Allow specifying SID for channels

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Message-ID: <20221117122654.GH93179@thinkpad>
Date:   Thu, 17 Nov 2022 17:56:54 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     konrad.dybcio@...ainline.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        quic_jprakash@...cinc.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        steev@...i.org, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Herring <robh@...nel.org>, andersson@...nel.org
Subject: Re: [PATCH v4 01/12] dt-bindings: iio: qcom: adc7-pm8350: Allow
 specifying SID for channels

On Thu, Nov 17, 2022 at 01:14:00PM +0100, Krzysztof Kozlowski wrote:
> On 03/11/2022 10:57, Manivannan Sadhasivam wrote:
> > As per the new ADC7 architecture used by the Qualcomm PMICs, each PMIC
> > has the static Slave ID (SID) assigned by default. The primary PMIC
> > PMK8350 is responsible for collecting the temperature/voltage data from
> > the slave PMICs and exposing them via it's registers.
> > 
> > For getting the measurements from the slave PMICs, PMK8350 uses the
> > channel ID encoded with the SID of the relevant PMIC. So far, the
> > dt-binding for the slave PMIC PM8350 assumed that there will be only
> > one PM8350 in a system. So it harcoded SID 1 with channel IDs.
> > 
> > But this got changed in platforms such as Lenovo X13s where there are a
> > couple of PM8350 PMICs available. So to address multiple PM8350s, change
> > the binding to accept the SID specified by the user and use it for
> > encoding the channel ID.
> > 
> > It should be noted that, even though the SID is static it is not
> > globally unique. Only the primary PMIC has the unique SID id 0.
> > 
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > Acked-by: Rob Herring <robh@...nel.org>
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> 
> This was never sent to IIO maintainers, so now next is failing.
> 

I missed it since there was only one bindings patch and rest all were dts :/

> Please use scripts/get_maintainers.pl to get a list of necessary people
> and lists to CC.  It might happen, that command when run on an older
> kernel, gives you outdated entries.  Therefore please be sure you base
> your patches on recent Linux kernel.
> 

The problem was that I didn't rebase my patches on top of linux-next/Bjorn's
for-next at that time but used v6.1-rcX. So I did not see the example in
spmi-vadc.

Thanks,
Mani

> Best regards,
> Krzysztof
> 

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