Hi,
Building off of the leds-group-multicolor driver it may be useful for
some platforms (such as Siemens' IOT2050) to use such an LED grouping as
a panic-indicator LED.
Currently the main blocker for this is that leds-group-multicolor
implements .brightness_set_blocking(), which cannot be used in the panic
path. From my current understanding there is nothing stopping converting
the current implementation of the callback into .brightness_set(), since
it already calls the non-blocking led_set_brightness().
However, looking into the similar driver leds-pwm-multicolor on which
leds-group-multicolor seems to be based there is a mutex on its
callback, which raises the question if this mutex is also needed on
group-multicolor (which would impede the callback conversion) and, if
so, what does it guard against?
Thank you for your help!
Diogo
