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

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Date:   Thu, 18 Nov 2021 15:28:46 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Arnd Bergmann <arnd@...nel.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


Hi Arnd,

thanks you for your feedbacks.

I'll wait for feedbacks from Rob and propose a version with implementation.

On 18/11/2021 14:33, Arnd Bergmann wrote:
> 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
> 


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