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From: Mark Brown <broonie@kernel.org>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	linux-kernel@vger.kernel.org, Liam Girdwood <lgirdwood@gmail.com>,
	Lucas Stach <l.stach@pengutronix.de>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	linux-samsung-soc@vger.kernel.org,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Kamil Konieczny <k.konieczny@samsung.com>
Subject: Re: [PATCH] regulator: core: Skip balancing of the enabled regulators in regulator_enable()
Date: Tue, 8 Oct 2019 18:17:47 +0100	[thread overview]
Message-ID: <20191008171747.GS4382@sirena.co.uk> (raw)
In-Reply-To: <4ad890b7-705e-94f9-2e61-1f3a60984c91@gmail.com>

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On Tue, Oct 08, 2019 at 08:05:03PM +0300, Dmitry Osipenko wrote:
> 08.10.2019 19:15, Mark Brown пишет:

> > That sounds like it might just postpone the inevitable - if you set the
> > wrong voltage first it might decide to drop down some voltage that
> > wasn't expected.  There's a bit of a bootstrapping issue.  I think it
> > would be safer to just say that anything that is within spec won't get
> > changed any time we balance, we'd only change things if needed to bring
> > them back into spec.

> Yes, the case of changing voltage before regulator is enabled seems
> won't work as expected.

> Maybe it won't hurt to disallow a non always-on regulators to be coupled
> until there will be a real user for that case.

I thought that coupling with the CPU core and main SoC power regulators
was one of the main use cases for this feature?

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  parent reply	other threads:[~2019-10-08 17:17 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20191008101720eucas1p2e0d1bca6e696848bf689067e05620679@eucas1p2.samsung.com>
2019-10-08 10:17 ` [PATCH] regulator: core: Skip balancing of the enabled regulators in regulator_enable() Marek Szyprowski
2019-10-08 10:17   ` Marek Szyprowski
2019-10-08 11:50   ` Mark Brown
2019-10-08 11:50     ` Mark Brown
2019-10-08 12:01     ` Marek Szyprowski
2019-10-08 12:01       ` Marek Szyprowski
2019-10-08 12:06       ` Mark Brown
2019-10-08 12:06         ` Mark Brown
2019-10-08 12:38         ` Marek Szyprowski
2019-10-08 12:38           ` Marek Szyprowski
2019-10-08 12:47           ` Mark Brown
2019-10-08 12:47             ` Mark Brown
2019-10-08 13:24             ` Bartlomiej Zolnierkiewicz
2019-10-08 13:24               ` Bartlomiej Zolnierkiewicz
2019-10-08 15:02               ` Dmitry Osipenko
2019-10-08 15:02                 ` Dmitry Osipenko
2019-10-08 16:15                 ` Mark Brown
2019-10-08 16:15                   ` Mark Brown
2019-10-08 17:05                   ` Dmitry Osipenko
2019-10-08 17:05                     ` Dmitry Osipenko
2019-10-08 17:17                     ` Mark Brown [this message]
2019-10-08 17:17                       ` Mark Brown
2019-10-08 18:00                       ` Dmitry Osipenko
2019-10-08 18:00                         ` Dmitry Osipenko
2019-10-08 18:07                         ` Mark Brown
2019-10-08 18:07                           ` Mark Brown
2019-10-09 10:29                           ` Marek Szyprowski
2019-10-09 10:29                             ` Marek Szyprowski
2019-10-09 14:13                             ` Mark Brown
2019-10-09 14:13                               ` Mark Brown
2019-10-10  7:29                               ` Viresh Kumar
2019-10-10  7:29                                 ` Viresh Kumar
2019-10-10 10:19                               ` Marek Szyprowski
2019-10-10 10:19                                 ` Marek Szyprowski
2019-10-10 13:55                                 ` Mark Brown
2019-10-10 13:55                                   ` Mark Brown
2019-10-17 10:29                                   ` Marek Szyprowski
2019-10-08 15:48               ` Mark Brown
2019-10-08 15:48                 ` Mark Brown
2019-10-08 16:02                 ` Bartlomiej Zolnierkiewicz
2019-10-08 16:02                   ` Bartlomiej Zolnierkiewicz
2019-10-08 16:21                   ` Mark Brown
2019-10-08 16:21                     ` Mark Brown

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