From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Marcus Folkesson <marcus.folkesson@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Regulator constraints and userspace consumer
Date: Thu, 15 Sep 2011 00:27:07 +0100 [thread overview]
Message-ID: <20110914232706.GB2953@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <CAM8FrKKEXUwV6=cMzqi0Le7eadb2XWkrjSQ+jm=QBUJMGPKztQ@mail.gmail.com>
On Wed, Sep 14, 2011 at 08:54:47PM +0200, Marcus Folkesson wrote:
> What is the most accurate way to set the voltage for these
> limitations when the system starts up? There is apparently no check if
> the default configuration is within limits as the regulator stays on
> 1125mV.
> When I'm looking in the userspace consumer (/sys/class/regulator/),
> the "max_microvolts" and "min_microvolts" is set to 1000000 but the
> "microvolts" is set to 1125000.
Set apply_uV in hte constraints. The regulator framework won't touch
the hardware unless explicitly told to.
> * I want to change the output voltage from userspace on demand. What
> is the most proper way to do this? If I have understand correctly, the
> userspace consumer just exports interface for switching on/off the
> regulator, is that correct?
Why do you wish to do this? In general this is not a good sign. There
is the virtual consumer but that is explicitly intended for test, it's
not really supposed to be used in production.
next prev parent reply other threads:[~2011-09-14 23:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-14 18:54 Regulator constraints and userspace consumer Marcus Folkesson
2011-09-14 23:27 ` Mark Brown [this message]
2011-09-15 5:21 ` Marcus Folkesson
2011-09-15 7:51 ` Mark Brown
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