Implement per-key keyboard backlight as auxdisplay?

[Werner Sembach]

Hi,

coming from the leds mailing list I'm writing with Pavel how to best handle 
per-key RGB keyboards.

His suggestion was that it could be implemented as an aux display, but he also 
suggested that I ask first if this fits.

The specific keyboard RGB controller I want to implement takes 6*21 rgb values. 
However not every one is actually mapped to a physical key. e.g. the bottom row 
needs less entries because of the space bar. Additionally the keys are ofc not 
in a straight line from top to bottom.

Best regards,

Werner