Re: Maximum values for multi_intensity sysfs attribute

[Werner Sembach <wse@tuxedocomputers.com>]

Am 03.03.26 um 21:11 schrieb Armin Wolf:
> Am 14.02.26 um 20:15 schrieb Armin Wolf:
>
>> Hello,
>>
>> i am currently adding support for RGB keyboard backlight control to the 
>> uniwill-laptop
>> driver, and want to use the multicolor LED class for that. However the 
>> hardware interface
>> is a bit exotic:
>>
>> - 5 global brightness levels
>> - 50 intensity levels for each R/G/B channel
>>
>> I am now asking myself how this should be mapped onto the multi_intensity 
>> sysfs attribute.
>> Should i set max_brightness to 5 and reject intensity values larger that 50? 
>> Or should
>> i set max_brightness to 50 and interpolate? What is the input range of 
>> intensity values?
>>
>> Thanks,
>> Armin Wolf 
>
> Any ideas on this? My current approach would be to use 5 for the max 
> brightness and clamp intensity
> values to 50.
Another idea is to have multi_intensity values 0-255 and then map it to the 
closest color so normal rgb values can be passed
>
> Thanks,
> Armin Wolf
>