linux-kernel - Re: [PATCH v7 2/8] arm: parse cpu capacity-dmips-mhz from DT

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Date:   Mon, 12 Sep 2016 09:55:39 +0100
From:   Juri Lelli <juri.lelli@....com>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King - ARM Linux <linux@....linux.org.uk>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v7 2/8] arm: parse cpu capacity-dmips-mhz from DT

Hi,

On 12/09/16 10:36, Vincent Guittot wrote:
> Hi Juri,
> 
> On 5 September 2016 at 16:22, Juri Lelli <juri.lelli@....com> wrote:
> > With the introduction of cpu capacity-dmips-mhz bindings, CPU capacities
> > can now be calculated from values extracted from DT and information
> > coming from cpufreq. Add parsing of DT information at boot time, and
> > complement it with cpufreq information. We keep code that can produce
> > same information, based on different DT properties and hard-coded
> > values, as fall-back for backward compatibility.
> >
> > Caveat: the information provided by this patch will start to be used in
> > the future. We need to #define arch_scale_cpu_capacity to something
> > provided in arch, so that scheduler's default implementation (which gets
> > used if arch_scale_cpu_capacity is not defined) is overwritten.
> >
> > Cc: Russell King <linux@....linux.org.uk>
> > Signed-off-by: Juri Lelli <juri.lelli@....com>
> 
> Acked-by: Vincent Guittot <vincent.guittot@...aro.org>
> 

Thanks!

Best,

- Juri