Quelle  sysfs-platform-ideapad-laptop

What:  /sys/bus/platform/devices/VPC2004:*/camera_power
Date:  Dec 2010
KernelVersion: 2.6.37
Contact: "Ike Panhc <ike.pan@canonical.com>"
Description:
  Control the power of camera module. 1 means on, 0 means off.

What:  /sys/bus/platform/devices/VPC2004:*/fan_mode
Date:  June 2012
KernelVersion: 3.6
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
  Change fan mode
  There are four available modes:

   * 0 -> Super Silent Mode
   * 1 -> Standard Mode
   * 2 -> Dust Cleaning
   * 4 -> Efficient Thermal Dissipation Mode

What:  /sys/bus/platform/devices/VPC2004:*/touchpad
Date:  May 2017
KernelVersion: 4.13
Contact: "Ritesh Raj Sarraf <rrs@debian.org>"
Description:
  Control touchpad mode.
   * 1 -> Switched On
   * 0 -> Switched Off

What:  /sys/bus/platform/devices/VPC2004:*/fn_lock
Date:  May 2018
KernelVersion: 4.18
Contact: "Oleg Keri <ezhi99@gmail.com>"
Description:
  Control fn-lock mode.

   * 1 -> Switched On
   * 0 -> Switched Off

  For example::

    # echo "0" > \
    /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock

What:  /sys/bus/platform/devices/VPC2004:*/usb_charging
Date:  Feb 2021
KernelVersion: 5.12
Contact: platform-driver-x86@vger.kernel.org
Description:
  Controls whether the "always on USB charging" feature is
  enabled or not. This feature enables charging USB devices
  even if the computer is not turned on.