linux-kernel - Re: [RFC] DT: bindings: Powerzone new bindings

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Message-ID: <CAK8P3a0fLzjFSHRDHT7-eEnk0+E4zPrk-_g53ROs_dmyc3g1EA@mail.gmail.com>
Date:   Thu, 18 Nov 2021 14:33:45 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     Rob Herring <robh@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rafael Wysocki <rafael@...nel.org>
Subject: Re: [RFC] DT: bindings: Powerzone new bindings

On Mon, Nov 15, 2021 at 11:39 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> The proposed bindings are describing a powerzone, a power capping
> capable place to act on and where we can read the power
> consumption. The powerzone semantic is also found on the Intel
> platform with the RAPL register.
>
> The powerzone can also represent a group of children powerzones, hence
> the description can result on a hierarchy.
>
> The description gives the power constraint dependencies to apply on a
> specific group of logically or physically aggregated devices. They do
> not represent the physical location or the power domains of the SoC
> even if the description could be similar.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>

Hi Daniel,

This looks reasonable to me, based on what I remember from previous
discussions, but it would be good if you could summarize the points that
have already been discussed in the past, e.g. which approaches you have
tried out before and how you ended  up here, including links to mailing
list archives.

I know you've been at this for quite some time now, but I can never
remember the bits that we discussed in the past myself.

        Arnd