linux-kernel - Re: [PATCH v3 02/13] PM / Domains: Add DT bindings for power-on/off latencies

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Message-ID: <20140926152835.GK10233@codeaurora.org>
Date:	Fri, 26 Sep 2014 08:28:35 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Geert Uytterhoeven <geert+renesas@...der.be>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Philipp Zabel <philipp.zabel@...il.com>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Kevin Hilman <khilman@...aro.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 02/13] PM / Domains: Add DT bindings for power-on/off
 latencies

> On 25 September 2014 18:28, Geert Uytterhoeven <geert+renesas@...der.be> wrote:
> > +Optional properties:
> > + - power-on-latency: Power-on latency of the PM domain, in ns,
> > + - power-off-latency: Power-off latency of the PM domain, in ns.
> > +
> >  Example:
> >
> >         power: power-controller@...40000 {
> >                 compatible = "foo,power-controller";
> >                 reg = <0x12340000 0x1000>;
> >                 #power-domain-cells = <1>;
> > +               power-on-latency = <250000>;
> > +               power-off-latency = <250000>;

This assumes every power domain within a power controller has the
same latencies? That isn't always true. This should be an array
of values corresponding to the number of power domains if
#power-domain-cells is 1, or just one value if the cell count is
0.

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