linux-kernel - Re: [PATCH 09/19] arm: dts: qcom: sdx55/sdx65: Fix CPU power-domain-names

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Message-ID: <CAPDyKFoZ7NfN+pkCPnusvTOEaxbQhr=1FJqzdDGrLcKAzBpGyQ@mail.gmail.com>
Date: Mon, 7 Apr 2025 18:27:10 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: "Rob Herring (Arm)" <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, Viresh Kumar <viresh.kumar@...aro.org>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
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	Vincenzo Frascino <vincenzo.frascino@....com>, Liviu Dudau <liviu.dudau@....com>, 
	Sudeep Holla <sudeep.holla@....com>, Lorenzo Pieralisi <lpieralisi@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Viresh Kumar <vireshk@...nel.org>, 
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	linux-amlogic@...ts.infradead.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH 09/19] arm: dts: qcom: sdx55/sdx65: Fix CPU power-domain-names

On Fri, 4 Apr 2025 at 22:41, Konrad Dybcio
<konrad.dybcio@....qualcomm.com> wrote:
>
> On 4/4/25 4:59 AM, Rob Herring (Arm) wrote:
> > "rpmhpd" is not documented nor used anywhere. As the enable-method is
> > "psci" use "psci" for the power-domain name.
> >
> > Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
> > ---
>
> "psci" is what we want here, but these platforms require some more
> massaging..

So this isn't for CPU performance scaling?

>
> These SoCs don't seem to have any PSCI idle states (deeper than WFI)
> described, which is no bueno, as they support some..

If PSCI PC mode is the only supported CPU suspend mode, we don't need
the power-domain topology to be described in DT as it's optional to
use.

Is this a PC or OSI based platform?

>
> I'll try to improve this.
>
> Konrad
>

Kind regards
Uffe