From: Liam Girdwood <lrg@slimlogic.co.uk>
To: Priya Sehgal <priya.sehgal@gmail.com>
Cc: linux-pm@lists.linux-foundation.org
Subject: Re: how can we modify voltage on DVFS through Linux
Date: Sat, 17 Oct 2009 20:18:10 +0100 [thread overview]
Message-ID: <1255807090.19139.289.camel@vega> (raw)
In-Reply-To: <9c3f89cc0910161227l599965c9me23d563642592cfc@mail.gmail.com>
On Fri, 2009-10-16 at 15:27 -0400, Priya Sehgal wrote:
> Hello,
> I am working on DVFS capable CPU - Nehalem quad core and I need to
> modify the
> CPU speed and voltage. I disabled cpuspeed service on my machine and
> modified
> some piece of cpuspeed code, to change the frequency of all the CPUs
> the way I want.
>
> I am curious whether the voltage gets increased and decreased in
> proportion to the
> frequency, or can we control the voltage separately. I could not
> locate any /sys entries for voltage
> only for frequency.
>
Have a look at voltage regulator framework in include/linux/regulator.
It's used for CPU DVFS on ARM atm.
Liam
prev parent reply other threads:[~2009-10-17 19:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-16 19:27 how can we modify voltage on DVFS through Linux Priya Sehgal
2009-10-17 19:18 ` Liam Girdwood [this message]
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