Hi Marek, On 3/28/20 1:36 PM, Marek Behun wrote: >> This was only RFC, please do not merge. > > Jacek, Pavel, > > I decided to abandon the microcontroller driver path. > But nonetheless there is still one thing I would like to solve. > > The front button on Omnia is used to control the global brightness of > the RGB LEDs, so that user can change it if the LEDs glow too much. > The microcontroller does this as such: there is another PWM on top of > all the LED PWMs, and this value can be manipulated via the same i2c > interface as the LEDs, but via another command. > > The thing is that I would like to somehow export this global brightness > setting to userspace, because otherwise it gets reset after reboot, and > I want the user to be able to set this global brightness by software, > so that they won't have to change it after every reboot manually by > pressing the front button. > > I am wondering how to do this. Last year I proposed this by adding a > sysfs attribute file to the device which is parent to the LEDs, but you > did not agree :( I already proposed adding a "luma" LED class device for similar case [0], but didn't here any feedback from Pavel so far. [0] https://lore.kernel.org/linux-leds/1583502010-16210-1-git-send-email-nbelin@xxxxxxxxxxxx/T/#mf52c8d4f68260a445223c26957c61e6267e0932d -- Best regards, Jacek Anaszewski
