linux-kernel - Re: [PATCH v2 1/2] dt: bindings: lm3697: Add bindings for lm3697 driver

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Date:   Wed, 8 Aug 2018 23:02:16 +0200
From:   Pavel Machek <pavel@....cz>
To:     Dan Murphy <dmurphy@...com>
Cc:     robh+dt@...nel.org, jacek.anaszewski@...il.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt: bindings: lm3697: Add bindings for lm3697
 driver

Hi!

> >> +	- #size-cells : 0
> >> +	- control-bank-cfg - : Indicates which sink is connected to which control bank
> >> +		0 - All HVLED outputs are controlled by bank A
> >> +		1 - HVLED1 is controlled bank B, HVLED2/3 are controlled by bank A
> >> +		2 - HVLED2 is controlled bank B, HVLED1/3 are controlled by bank A
> >> +		3 - HVLED1/2 are controlled by bank B, HVLED3 is controlled by bank A
> >> +		4 - HVLED3 is controlled by bank B, HVLED1/2 are controlled by bank A
> >> +		5 - HVLED1/3 is controlled by bank B, HVLED2 is controlled by bank A
> >> +		6 - (default) HVLED1 is controlled by bank A, HVLED2/3 are controlled by bank B
> >> +		7 - All HVLED outputs are controlled by bank B
> > 
> > This is quite long way to describe a bitmask, no? Could we make
> > it so that control-bank-cfg is not needed?
> 
> The problem we have here is there is a potential to control
> 3 different LED string but only 2 sinks.  So control bank A can control 2 LED strings and control
> bank b can control 1 LED string.  
> 

Can we forget about the LED strings, and just expose the sinks as
Linux LED devices?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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