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+What: /sys/bus/hid/drivers/logitech-hidpp-device/<dev>/range
+Date: Jan, 2016
+KernelVersion: 4.6
+Contact: linux-input@vger.kernel.org
+Description:
+ (RW) This attribute controls the amount of 'turn' permitted in
+ Logitech G920 wheel. Reading from the file shows the current
+ range of the steering wheel. Writing a value within the min and
+ max boundary sets the range of the wheel.
+
+What: /sys/bus/hid/drivers/logitech-hidpp-device/<dev>/builtin_power_supply
+Date: Apr, 2017
+KernelVersion: 4.12
+Contact: linux-input@vger.kernel.org
+Description:
+ Presence of this file indicates that HID++ driver is capable of
+ handling battery properties in the kernel. This way, upower can
+ add a udev rule to decide whether or not it should use the
+ internal unifying support or the generic kernel one.