From: Mark Brown <broonie@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
Liam Girdwood <lgirdwood@gmail.com>,
kernel@pengutronix.de, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Viresh Kumar <viresh.kumar@linaro.org>
Subject: Re: Voltage setting on chained regulators, how?
Date: Tue, 29 Sep 2015 16:00:17 +0100 [thread overview]
Message-ID: <20150929150017.GR30445@sirena.org.uk> (raw)
In-Reply-To: <20150929080044.GS7858@pengutronix.de>
[-- Attachment #1: Type: text/plain, Size: 796 bytes --]
On Tue, Sep 29, 2015 at 10:00:44AM +0200, Sascha Hauer wrote:
> On Fri, Sep 25, 2015 at 09:47:26AM -0700, Mark Brown wrote:
> > I suspect you always want the LDO in there to clean the supply up, it's
> > just a more serious issue when more power is being drawn.
> I just had a look at the i.MX6 datasheets and saw that while it's
> possible to put the LDOs in bypass mode the expected lifetime of the SoC
> decreases without the LDOs. So it seems better to let them enabled and
> just make the voltage drop as small as possible.
Yeah, that sounds pretty standard. It would be really good to get
support for minimising the voltage drop over the LDO, there are going to
be quite a few systems which could get a power consumption benefit from
dynamically tuning the voltages of DCDCs like this.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 473 bytes --]
prev parent reply other threads:[~2015-09-29 15:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-25 9:07 Sascha Hauer
2015-09-25 16:47 ` Mark Brown
2015-09-29 8:00 ` Sascha Hauer
2015-09-29 15:00 ` Mark Brown [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150929150017.GR30445@sirena.org.uk \
--to=broonie@kernel.org \
--cc=kernel@pengutronix.de \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=rjw@rjwysocki.net \
--cc=s.hauer@pengutronix.de \
--cc=viresh.kumar@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®