xref: /linux/Documentation/ABI/testing/sysfs-class-led-trigger-tty (revision 151ebcf0797b1a3ba53c8843dc21748c80e098c7) 
1What:		/sys/class/leds/<tty_led>/ttyname
2Date:		Dec 2020
3KernelVersion:	5.10
4Contact:	linux-leds@vger.kernel.org
5Description:
6		Specifies the tty device name of the triggering tty
7
8What:		/sys/class/leds/<tty_led>/rx
9Date:		February 2024
10KernelVersion:	6.8
11Description:
12		Signal reception (rx) of data on the named tty device.
13		If set to 0, the LED will not blink on reception.
14		If set to 1 (default), the LED will blink on reception.
15
16What:		/sys/class/leds/<tty_led>/tx
17Date:		February 2024
18KernelVersion:	6.8
19Description:
20		Signal transmission (tx) of data on the named tty device.
21		If set to 0, the LED will not blink on transmission.
22		If set to 1 (default), the LED will blink on transmission.
23
24What:		/sys/class/leds/<tty_led>/cts
25Date:		February 2024
26KernelVersion:	6.8
27Description:
28		CTS = Clear To Send
29		DCE is ready to accept data from the DTE.
30		If the line state is detected, the LED is switched on.
31		If set to 0 (default), the LED will not evaluate CTS.
32		If set to 1, the LED will evaluate CTS.
33
34What:		/sys/class/leds/<tty_led>/dsr
35Date:		February 2024
36KernelVersion:	6.8
37Description:
38		DSR = Data Set Ready
39		DCE is ready to receive and send data.
40		If the line state is detected, the LED is switched on.
41		If set to 0 (default), the LED will not evaluate DSR.
42		If set to 1, the LED will evaluate DSR.
43
44What:		/sys/class/leds/<tty_led>/dcd
45Date:		February 2024
46KernelVersion:	6.8
47Description:
48		DCD = Data Carrier Detect
49		DTE is receiving a carrier from the DCE.
50		If the line state is detected, the LED is switched on.
51		If set to 0 (default), the LED will not evaluate CAR (DCD).
52		If set to 1, the LED will evaluate CAR (DCD).
53
54What:		/sys/class/leds/<tty_led>/rng
55Date:		February 2024
56KernelVersion:	6.8
57Description:
58		RNG = Ring Indicator
59		DCE has detected an incoming ring signal on the telephone
60		line. If the line state is detected, the LED is switched on.
61		If set to 0 (default), the LED will not evaluate RNG.
62		If set to 1, the LED will evaluate RNG.
63