On Fri 2017-12-15 11:22:24, Dan Murphy wrote:
> Pavel
> 
> On 12/15/2017 03:09 AM, Pavel Machek wrote:
> > Hi!
> > 
> >> @@ -35,6 +37,7 @@ led-controller@2d {
> >>  	led@0 {
> >>  		reg = <0>;
> >>  		label = "white:display_cluster";
> >> +		linux,default-trigger = "backlight";
> >>  	};
> >>  }
> > 
> > What is "display_cluster"? Is it display backlight?
> > 
> 
> This device can be configured to drive all 4 LED strings in display mode
> so that all 4 strings have the same brightness controlled either through PWM or
> through the brightness register 
> 
> or
> 
> As cluster string where the brightness of individual strings or clustered strings
> can be controlled via independent brightness control registers.  I am currently working
> on adding this support to the driver.

Ok; but I guess I'd like to keep this implementation detail away from
kernel, and just expose as display:white:backlight or something like that.

-- 
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