linux-kernel - Re: [RFC] adp1653: Add device tree bindings for LED controller

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Message-ID: <20141117101553.GA21151@amd>
Date:	Mon, 17 Nov 2014 11:15:53 +0100
From:	Pavel Machek <pavel@....cz>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	sre@...ian.org, sre@...g0.de,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, freemangordon@....bg, bcousson@...libre.com,
	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	sakari.ailus@....fi, devicetree@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: Re: [RFC] adp1653: Add device tree bindings for LED controller

On Mon 2014-11-17 11:09:45, Pali Rohár wrote:
> On Monday 17 November 2014 11:05:19 Pavel Machek wrote:
> > Hi!
> > 
> > On Mon 2014-11-17 09:43:19, Pali Rohár wrote:
> > > On Sunday 16 November 2014 08:59:28 Pavel Machek wrote:
> > > > For device tree people: Yes, I know I'll have to create
> > > > file in documentation, but does the binding below look
> > > > acceptable?
> > > > 
> > > > I'll clean up driver code a bit more, remove the printks.
> > > > Anything else obviously wrong?
> > > 
> > > I think that this patch is probably not good and specially
> > > not for n900. adp1653 should be registered throw omap3 isp
> > > camera subsystem which does not have DT support yet.
> > 
> > Can you explain?
> > 
> > adp1653 is independend device on i2c bus, and we have kernel
> > driver for it (unlike rest of n900 camera system). Just now
> > it is unusable due to lack of DT binding. It has two
> > functions, LED light and a camera flash; yes, the second one
> > should be integrated to the rest of camera system, but that
> > is not yet merged. That should not prevent us from merging DT
> > support for the flash, so that this part can be
> > tested/maintained.
> > 
> 
> Ok. When ISP camera subsystem has DT support somebody will modify 
> n900 DT to add camera flash from adp1653 to ISP... I believe it 
> will not be hard.

Exactly. And yes, I'd like to get complete camera support for n900
merged. But first step is "make sure existing support does not break".

Best regards,
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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