From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Vladimir Zapolskiy
<vladimir_zapolskiy-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>
Cc: Liam Girdwood <lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Question about fixed regulator DT properties
Date: Wed, 26 Nov 2014 19:20:21 +0000 [thread overview]
Message-ID: <20141126192021.GU7712@sirena.org.uk> (raw)
In-Reply-To: <5476266E.9040901-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>
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On Wed, Nov 26, 2014 at 09:13:50PM +0200, Vladimir Zapolskiy wrote:
> If I want to enable a fixed regulator (not controlled by
> bootloader/firmware) by Linux on boot or when fixed.ko module is bound,
> shall I specify the same "regulator-boot-on" property? At least this is
> the practical way to enable a fixed and/or gpio regulator right now, but
> is it correct?
It depends what you're trying to accomplish by doing this.
> Or should the regulator always be enabled externally (assuming
> "regulator-always-on" is omitted) after registration independently on
> "regulator-boot-on" property?
Best practice is that there should be a consumer which keeps the
regulator enabled whenever it is required. There should normally be
little use for boot-on, it's mostly there to ease handover from the
bootloader in cases where we can't read the hardware state - if you're
not sure if you should use it the chances are you shouldn't.
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next prev parent reply other threads:[~2014-11-26 19:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-18 15:00 Question about Vladimir Zapolskiy
2014-11-19 14:38 ` Question about fixed regulator DT properties Vladimir Zapolskiy
[not found] ` <546CAB49.8030103-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>
2014-11-25 12:17 ` Mark Brown
[not found] ` <20141125121749.GV7712-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-11-26 17:27 ` Vladimir Zapolskiy
2014-11-26 17:53 ` Mark Brown
[not found] ` <20141126175304.GM7712-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-11-26 19:13 ` Vladimir Zapolskiy
[not found] ` <5476266E.9040901-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>
2014-11-26 19:20 ` Mark Brown [this message]
[not found] ` <20141126192021.GU7712-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-11-26 19:57 ` Vladimir Zapolskiy
2014-11-26 20:36 ` Mark Brown
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