linux-kernel - Re: Regulator constraints and userspace consumer

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Message-ID: <20110915075147.GA5040@opensource.wolfsonmicro.com>
Date:	Thu, 15 Sep 2011 08:51:48 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Marcus Folkesson <marcus.folkesson@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Regulator constraints and userspace consumer

On Thu, Sep 15, 2011 at 07:21:24AM +0200, Marcus Folkesson wrote:

> We are working on an Software Defined Radio (SDR) in which power
> consumption is an important part of the product.
> The "modem" application executes in user space and has the
> responsibility to turn the voltage regulators on/off to the radio card
> and so on.
> When the application goes into power-down mode, there are circuits
> that are not used and we are able to reduce the voltage further by set
> down a few boost regulators.

I'd expect you have some sort of kernel mode driver for the hardware
side of things - shouldn't that be able to manage the regulators for
you?  What happens when someone deploys the software on a different
board?
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