From: "Heiko Stübner" <heiko@sntech.de>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>,
linux-kernel@vger.kernel.org, Axel Lin <axel.lin@gmail.com>
Subject: Re: regulator: Policy for setting current limits
Date: Tue, 7 Aug 2012 01:19:34 +0200 [thread overview]
Message-ID: <201208070119.35129.heiko@sntech.de> (raw)
In-Reply-To: <20120806115632.GB16861@opensource.wolfsonmicro.com>
Am Montag, 6. August 2012, 13:56:33 schrieb Mark Brown:
> On Mon, Aug 06, 2012 at 01:27:56AM +0200, Heiko Stübner wrote:
> > 500). Therefore if 500mA are the upper limit but the regulator also
> > supports lower values, these lower values always get selected (100mA in
> > my case). In contrast pda_power sets the target current as both lower
> > and upper limit.
>
> This isn't good, it means that the regulator has to be able to deliver
> exactly the limit requested.
>
> > (a) let the gpio-regulator select the max current (in contrast to the
> > minimum voltage)
> > (b) change gpio-vbus to also use the target current as min and max value
> > (c) something else
>
> Regulators should be tending to the maximum in the available range and
> consumers should specify the widest range possible so both a and b.
Is this true for all regulators (i.e. voltage and currency regulators)?
Because 4dbd8f63f07a (regulator: gpio-regulator: Set the smallest
voltage/current in the specified range) implemented the exact oposite.
Thanks
Heiko
next prev parent reply other threads:[~2012-08-06 23:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-05 23:27 regulator: Policy for setting current limits Heiko Stübner
2012-08-06 11:56 ` Mark Brown
2012-08-06 23:19 ` Heiko Stübner [this message]
2012-08-07 17:06 ` Mark Brown
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