What:		/sys/bus/i2c/devices/*/fn_lock
Date:		October 2026
KernelVersion:	7.5
Contact:	Oleg Keri <okerixx@gmail.com>
Description:
		Control fn-lock mode.

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

		When switched on, the function keys act as F1..F12 and the
		multimedia functions require the Fn modifier.

		The embedded controller reports the Fn+Esc key as an event but
		keeps no state of its own, so this attribute is the state: the
		driver toggles it when the key is pressed, and writing it takes
		effect immediately. A toggle from the key is signalled with
		sysfs_notify(), so the attribute can be polled.

		For example::

		  # echo "0" > /sys/bus/i2c/devices/9-0070/fn_lock
