linux-kernel - Re: [PATCH 1/6] arm64: dts: qcom: sm8550-mtp: use correct UFS supply

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Message-ID: <91f74079-1be3-4c66-9942-cb02c96c8848@linaro.org>
Date:   Wed, 6 Sep 2023 13:50:31 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.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
Subject: Re: [PATCH 1/6] arm64: dts: qcom: sm8550-mtp: use correct UFS supply

On 6.09.2023 13:39, Krzysztof Kozlowski wrote:
> On 06/09/2023 13:28, Konrad Dybcio wrote:
>> On 6.09.2023 12:47, Krzysztof Kozlowski wrote:
>>> According to schematics the VCCQ2 supply is not connected and the L3G
>>> regulator instead powers up the controller pads (VDD_PX10).  Use correct
>>> supply vdd-hba and drop unsupported current limit for the vdd-hba.
>> Why is it unsupported?
> 
> Maybe I was here not precise. I move the regulator from vccq2 to
> vdd-hba. vccq2 has control of current in UFS core driver. Bindings also
> allow it.
Looks like the bindings are out of sync with the driver.

ufshcd_populate_vreg() which parses current is used for both vccq2
and vdd-hba.

Konrad