Re: [RFC PATCH] led: add Cycle LED trigger.

From: Pavel Machek
Date: Sat Jun 22 2013 - 07:26:46 EST

On Tue 2013-06-18 18:24:23, Gaël PORTAY wrote:
> Currently, none of available triggers supports playing with the LED brightness
> level. The cycle trigger provides a way to define custom brightness cycle.
> For example, it is easy to customize the cycle to mock up the rhythm of human
> breathing which is a nice cycle to tell the user the system is doing something.
> This trigger is meant to be usable for waiting an event to happen, for example
> when the system gets ready. Those cycles may be used to reflect well known
> system status (e.g. idle mode, startup...).
> This implementation provides several interfaces:
> - to define the cycle itself:
> * plot: definition of plot points using plot or rawplot files,
> each points defines the brightness level
> * interval: constant time interval between each plot point
> - to control the cycle:
> * repeat: the number of repetition of the whole plot cycle
> 0 for an infinite loop
> * control: used to control the cycle trigger
> + "start"/"stop": to start/stop the cycle
> + "reset" to clear the cycle counter and the internal plot point index
> + "pause"/"resume" to pause/resume the cycle
> Signed-off-by: Gaël PORTAY <g.portay@xxxxxxxxxxx>

I'd say this should go to userspace.... and maybe should handle RGB
leds. ... like the one on n900/HTC dream/....

Actually, there's probably some daemon in maemo that already does
(cesky, pictures)
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