linux-kernel - Re: [PATCH v6 0/4] Runtime Interpreted Power Sequences

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Date:	Thu, 13 Sep 2012 08:50:47 +0300
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	Alexandre Courbot <acourbot@...dia.com>
Cc:	Stephen Warren <swarren@...dia.com>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	Simon Glass <sjg@...omium.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Anton Vorontsov <cbou@...l.ru>,
	David Woodhouse <dwmw2@...radead.org>,
	Arnd Bergmann <arnd@...db.de>,
	Leela Krishna Amudala <l.krishna@...sung.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fbdev@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-pm@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v6 0/4] Runtime Interpreted Power Sequences

On Wed, 2012-09-12 at 18:57 +0900, Alexandre Courbot wrote:
> New revision of the power sequences, taking as usual the feedback that was
> kindly provided about the last version.
> 
> I think now is a good time to discuss integrating this and to start looking for
> a maintainer who would be willing to merge this into his/her tree (I am
> especially thinking about the power framework maintainers, since this is where
> the code is right now. The second patch in this series enables the pwm_backlight
> driver to be used with the device tree, without relying on board-dependent
> callbacks to support complex power sequences. We also plan to use power
> sequences in other Tegra drivers, and other people have expressed interest in
> this work during earlier reviews. See for instance
> 
> https://lists.ozlabs.org/pipermail/devicetree-discuss/2012-August/018532.html
> 
> and
> 
> https://lkml.org/lkml/2012/9/6/270
> 
> There is probably some more details to fix and improve, but the current shape
> should be enough to know if we want this and where - therefore any sign from
> a maintainer would be greatly appreciated!

I want to reiterate my opinion that I think power sequences in DT data
is the wrong way to go. Powering sequences are device specific issues
and should be handled in the device driver. But I also think that power
sequences inside the drivers would probably be useful.

 Tomi


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