linux-kernel - Re: [PATCH v7 6/9] interconnect: qcom: rpm: Handle interface clocks

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Date:   Sat, 11 Mar 2023 15:32:05 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Georgi Djakov <djakov@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 6/9] interconnect: qcom: rpm: Handle interface clocks

On Sat, 11 Mar 2023 at 14:11, Bryan O'Donoghue
<bryan.odonoghue@...aro.org> wrote:
>
> On 11/03/2023 00:54, Konrad Dybcio wrote:
> >> - Update the commit log and potentially the structure comments
> > I'm probably just very biased because I authored these commits, but I can't
> > see which part is not clear.. Could I (and this is not passive-aggressive or
> > anything) ask for a pointer there?
> >
>
> I mean to say "non scaling clocks" isn't an indicator IMO of the fact
> that these are QoS node specific clocks.
>
> Right now the interconnect model is predicated on bus and bus_a but,
> you've found that on some SoCs we have node-specific clocks too.
>
> :g/non\ scaling/s//non-scaling\ node-specific/g
>
> would do or "QoS node-specific" the fact the clocks don't scale is
> incidental the dependency though is that IMO at least these are
> additional node-specific clocks we need to enable.

This looks somewhat close to what we have observed in the patches for
ipq9574 platform. It doesn't have a scaling interconnect (in other
words, no bus clocks), but some devices have clocks driving the NIU
(Network Interface Units) which connect the device to NoC.

>
> ---
> bod




--
With best wishes
Dmitry