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Message-ID: <CAPDyKFqmWRY4vb=JAqwBmGqRhpq0MrdiAt4jCt5tdhYsxz0ziw@mail.gmail.com>
Date:	Wed, 27 Jan 2016 10:43:10 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Thierry Reding <thierry.reding@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Rafael Wysocki <rjw@...ysocki.net>,
	Kevin Hilman <khilman@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Vince Hsu <vinceh@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH V4 16/16] ARM64: tegra: select PM_GENERIC_DOMAINS

[...]

>
> Any more thoughts on this?
>
> I have been discussing with Thierry and we think that selecting PM for
> tegra still makes the most sense. The question is, is this ok for
> multi-configs?

Yes, this is too me the best option.

Additionally, for those tegra SoCs/platforms that needs
PM_GENERIC_DOMAINS, it can safely select that as well.

>
> The only other suggestion/thought I have is to allow
> PM_GENERIC_DOMAINS_OF to be selected independently of PM so that we can
> have minimal support for PM domains that allows you to register PM
> domains with the kernel and their current state, but does not allow you
> to control them, etc. This way tegra could always select
> PM_GENERIC_DOMAINS_OF regardless of PM, and we would be able to
> determine if we can probe a device safely.
>
> I am not sure that Rafael is too keen on this approach but that is the
> only alternative I have come up with.

I think Rafael already made his point around this approach, which is a
clear no. And I fully agree with it.

Kind regards
Uffe

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