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+What: /sys/devices/platform/ideapad/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/devices/platform/ideapad/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/devices/platform/ideapad/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/pci/devices/<bdf>/<device>/VPC2004:00/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