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Message-ID: <86314819-6842-cfea-73d8-c991109742df@linaro.org>
Date:   Wed, 2 Nov 2022 16:06:17 -0400
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Subject: Re: [PATCH v2 01/12] dt-bindings: iio: qcom: adc7-pm8350: Allow
 specifying SID for channels
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To:     Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        andersson@kernel.org
Cc:     konrad.dybcio@somainline.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, johan+linaro@kernel.org,
        quic_jprakash@quicinc.com, linux-arm-msm@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        steev@kali.org
References: <20221029051449.30678-1-manivannan.sadhasivam@linaro.org>
 <20221029051449.30678-2-manivannan.sadhasivam@linaro.org>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20221029051449.30678-2-manivannan.sadhasivam@linaro.org>
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On 29/10/2022 01:14, 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.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof