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Date:	Mon, 10 Mar 2014 13:37:45 +0800
From:	Viresh Kumar <>
To:	"Rafael J. Wysocki" <>
Cc:	"Srivatsa S. Bhat" <>,
	Lists linaro-kernel <>,
	"" <>,
	"" <>,
	Linux Kernel Mailing List <>,
	Pierre Ossman <>
Subject: Re: [PATCH 1/2] cpufreq: Return error if ->get() failed in cpufreq_update_policy()

On 26 February 2014 13:15, Viresh Kumar <> wrote:
> On 26 February 2014 03:59, Rafael J. Wysocki <> wrote:
>> Yes, what exactly do we need it for in the core?
> Its probably there to make things faster. We cache the value so that we
> don't go to the hardware to read/calculate that again. Isn't it?
> And we need to know current freq on many occasions. One of that is that
> many drivers need to know the relation between current and new freq before
> they can make the change. As they might need to play with volt regulators
> before or after the freq change. Also it is used mainly in our loops_per_jiffiy
> calculations.

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