Re: Multicolor leds-gpio

[Alexander Dahl <ada@thorsis.com>]

Hei hei,

Am Donnerstag, 6. August 2020, 00:05:47 CEST schrieb Pavel Machek:
> > would it be possible to make the leds-gpio driver compatible with the new
> > multicolor framework for a light that's composed of 3 leds (red, green,
> > blue) and where each led is controlled via a gpio (so it can produce 8
> > different colors)? As far as I can tell leds-gpio is too generic to
> > support that but please correct me if I'm wrong. What's the way forward
> > here for this use case? The same probably also applies to leds-pwm.
> 
> For pwm it definitely makes sense.

I think it also makes sense for plain GPIO, I asked the same thing last year 
IIRC.

> For gpio... well, I'm not sure you'll get useful colors that way. You
> can probably still do multicolor, yes.

Let's assume a typical RGB LED, like the one on the SAMA5D27-SOM1-EK board, 
you would roughly get those colors:

- R: red
- G: green
- B: blue
- R + G: yellow
- R + B: magenta
- G + B: cyan
- R + G + B: white

I count more than twice the colors as with the simple leds-gpio approach only. 
;-)

SCNR
Alex