On Monday 04 January 2016 21:12:31 Pavel Machek wrote: > Hi1 > > > This patch adds support for controlling keyboard backlight via > > standard linux led class interface (::kbd_backlight). It uses ACPI > > HKEY device with MLCG and MLCS methods. > > > > Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx> > > Tested-by: Fabio D'Urso <fabiodurso@xxxxxxxxxx> > > On my thinkpad, keyboard light is controlled by > > /sys/class/leds/tpacpi\:\:thinklight/brightness > > (that's a bad name). Hi! That is light in upper case of bezel/display, right? Thinklight is probably official marketing name for that by IBM/Lenovo. My patch adds support for keyboard backlight (light under the keyboard). > On n900, it is .../leds/kb0..kb6. Now we'd have kbd_backlight. I > guess we should standartize on one name for this light, so that > userspace has the chance to handle it automatically... Looks like userspace already uses /sys/class/leds/*::kbd_backlight for keyboard backlight (light under the keyboard). At least other drivers uses this name and my KDE desktop recognized "dell::kbd_backlight" (from dell-laptop.ko) and "tpacpi::kbd_backlight" too. So really for keyboard backlight use *::kbd_backlight it is already handled by existing userspace applications. > Also, neccessity of workqueues for LED setting is slowly being > removed from the kernel, see LED mailing list for details. My patch uses kbd_backlight LED in same as as other LEDs in thinkpad acpi driver. -- Pali Rohár pali.rohar@xxxxxxxxx
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