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From: Pavel Machek <pavel@ucw.cz>
To: Dan Murphy <dmurphy@ti.com>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>,
	robh+dt@kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org
Subject: Re: [PATCH v2 1/2] dt: bindings: lm3697: Add bindings for lm3697 driver
Date: Thu, 9 Aug 2018 23:59:49 +0200	[thread overview]
Message-ID: <20180809215949.GA6949@amd> (raw)
In-Reply-To: <c028fb73-8df5-9402-d96e-c907199356ed@ti.com>

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Hi!

> > Following node would describe strings connected to the outputs
> > HVLED1 and HVLED2 controlled by bank A.
> > 
> > led@0 {
> > 	reg = <0>;
> > 	led-sources = <0>. <1>;
> > 	label = "white:first_backlight_cluster";
> > 	linux,default-trigger = "backlight";
> > };
> > 
> > 
> > IOW I agree with Pavel, but I propose to use already documented common
> > DT LED property.
> > 
> 
> I agree to use the led-sources but I still believe this approach may be confusing to other sw devs
> and will lead to configuration issues by users.
> 
> This implementation requires the sw dev to know which strings are controlled by which bank.
> And this method may produce a misconfiguration like something below where HVLED2 is declared in
> both bank A and bank B
> 
> led@0 {
> 	reg = <0>;
> 	led-sources = <0>. <1>;
> 	label = "white:first_backlight_cluster";
> 	linux,default-trigger = "backlight";
> };
> 
> led@1 {
> 	reg = <1>;
> 	led-sources = <1>. <2>;
> 	label = "white:keypad_cluster";
> 	linux,default-trigger = "backlight";
> };
> 
> The driver will need to be intelligent and declare a miss
> configuration on the above.

Yes. But please do it that way, it is still better than being
different from all the other drivers.

Thanks,
									Pavel

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

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  parent reply	other threads:[~2018-08-09 21:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-07 16:04 [PATCH v2 1/2] dt: bindings: lm3697: Add bindings for lm3697 driver Dan Murphy
2018-08-07 16:04 ` [PATCH v2 2/2] leds: lm3697: Introduce the " Dan Murphy
2018-08-08 19:59   ` Pavel Machek
2018-08-14 13:54     ` Dan Murphy
2018-08-08  7:56 ` [PATCH v2 1/2] dt: bindings: lm3697: Add bindings for " Michal Vokáč
2018-08-08  9:52   ` Jacek Anaszewski
2018-08-08 19:59 ` Pavel Machek
2018-08-08 20:42   ` Dan Murphy
2018-08-08 21:02     ` Pavel Machek
2018-08-08 21:04       ` Dan Murphy
2018-08-08 21:09         ` Pavel Machek
2018-08-08 21:41           ` Dan Murphy
2018-08-08 21:45             ` Pavel Machek
2018-08-08 21:50               ` Dan Murphy
2018-08-08 21:58                 ` Pavel Machek
2018-08-08 21:09         ` Jacek Anaszewski
2018-08-08 21:45           ` Dan Murphy
2018-08-09 12:09             ` Jacek Anaszewski
2018-08-09 13:24               ` Pavel Machek
2018-08-09 13:30               ` Dan Murphy
2018-08-09 14:48                 ` Jacek Anaszewski
2018-08-09 15:01                   ` Dan Murphy
2018-08-09 21:59                 ` Pavel Machek [this message]
2018-08-08 22:00 ` Pavel Machek

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