Hi! > > 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 :( This is really special feature, with button interaction. I don't expect to see it elsewhere. Can you put it into /sys somewhere close to the other controls for your platform? I have /proc/acpi/ibm on this machine. It should not be /proc in new code, but you get the idea... > I already proposed adding a "luma" LED class device for similar > case [0], but didn't here any feedback from Pavel so far. I dislike that. Luma is not really a color. Plus, this is different case AFAICT, as global brightness affects all the LEDs at the same time. > [0] > https://lore.kernel.org/linux-leds/1583502010-16210-1-git-send-email-nbelin@xxxxxxxxxxxx/T/#mf52c8d4f68260a445223c26957c61e6267e0932d Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
Attachment:
signature.asc
Description: PGP signature
