What:		/sys/class/leds/<led>/ttyname
Date:		Dec 2020
KernelVersion:	5.10
Contact:	linux-leds@vger.kernel.org
Description:
		Specifies the tty device name of the triggering tty

What:		/sys/class/leds/<led>/rx
Date:		February 2024
KernelVersion:	6.8
Description:
		Signal reception (rx) of data on the named tty device.
		If set to 0, the LED will not blink on reception.
		If set to 1 (default), the LED will blink on reception.

What:		/sys/class/leds/<led>/tx
Date:		February 2024
KernelVersion:	6.8
Description:
		Signal transmission (tx) of data on the named tty device.
		If set to 0, the LED will not blink on transmission.
		If set to 1 (default), the LED will blink on transmission.