linux-kernel - Re: [PATCH 4/4] arm64: dts: qcom: rename AOSS QMP node to pmu

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Date:   Mon, 12 Dec 2022 14:08:05 -0500
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] arm64: dts: qcom: rename AOSS QMP node to pmu

Quoting Krzysztof Kozlowski (2022-12-12 05:33:02)
> The Always On Subsystem (AOSS) QMP is not a power domain controller
> since commit 135780456218 ("arm64: dts: qcom: sc7180: Use QMP property
> to control load state") and few others.  In fact, it was never a power
> domain controller but rather control of power state of remote
> processors.  This power state control is know handled differently, thus
> the AOSS QMP nodes do not have power-domain-cells:
>
>   sc7280-idp.dtb: power-controller@...0000: '#power-domain-cells' is a required property
>   From schema: Documentation/devicetree/bindings/power/power-domain.yaml
>
> AOSS QMP is an interface to the actuall AOSS subsystem responsible for
> some of power management functions, thus let's call the nodes as "pmu" -
> Power Management Unit.

Isn't 'pmu' a performance monitoring unit?