linux-kernel - Re: [PATCH 09/11] arm64: dts: qcom: msm8998: Remove AGGRE2 clock from SLPI

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Date:   Sat, 12 Aug 2023 13:46:33 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Jeffrey Hugo <quic_jhugo@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Sibi Sankar <quic_sibis@...cinc.com>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/11] arm64: dts: qcom: msm8998: Remove AGGRE2 clock from
 SLPI

On 21.07.2023 17:50, Jeffrey Hugo wrote:
> On 7/21/2023 9:36 AM, Konrad Dybcio wrote:
>> The AGGRE2 clock is a clock for the entire AGGRE2 bus, managed from
>> within the interconnect driver. Attaching it to SLPI was a total hack.
>> Get rid of it.
> 
> Nit - why do we care what driver manages the clock?  DT describes hardware...
> 
> The entire SLPI block hangs off the AGGRE2 bus, so that bus needs to be on for the SLPI.  I agree that AGGRE2 is really an interconnect device and SLPI should be a consumer of that, but we don't have 8998 interconnects defined yet.  Seems like this hack is still needed.
As we concluded in private, this has no effect as the clk-smd-rpm driver
leaves that clock dangling at FMAX anyway

Konrad