linux-kernel - Re: [PATCHv9 1/3] Runtime Interpreted Power Sequences

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Date:	Thu, 22 Nov 2012 12:09:54 +0900
From:	Alexandre Courbot <gnurou@...il.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Thierry Reding <thierry.reding@...onic-design.de>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Tomi Valkeinen <tomba@....fi>,
	Grant Likely <grant.likely@...retlab.ca>,
	Anton Vorontsov <cbouatmailru@...il.com>,
	Stephen Warren <swarren@...dia.com>,
	Mark Zhang <markz@...dia.com>,
	Rob Herring <rob.herring@...xeda.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCHv9 1/3] Runtime Interpreted Power Sequences

On Thu, Nov 22, 2012 at 11:06 AM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:
> On Thu, Nov 22, 2012 at 11:01:34AM +0900, Alexandre Courbot wrote:
>
>> The thing I don't understand here is why would anyone want power
>> sequences without the DT representation. Guys, that's the whole point! :)
>
>> If we are to implement things into drivers, then callback functions
>> are going to serve us just as well - even better, for they are more
>> flexible. All we need to do is define a dedicated ops structure and
>> have the driver plug the right callback functions depending on the
>> "compatible" property of the DT device node. We don't need a framework
>> for that.
>
> It allows drivers (both board drivers and actual drivers) to write these
> things in a semi-scripted form instead of having to open code everything
> each time, it'd save a bunch of tedious stuff with resource requesting
> for example.

Mmm, I overlooked that point - that's fair enough. Guess I should
remove all DT support and stress that point in the documentation. Then
maybe we'll have a deal.

Alex.
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