linux-next/sysfs-class-led-trigger-tty at f9bc754be475582e2cc44296f7de0aaedbdbefeb - linux-next - ClassFun

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Uwe Kleine-König fd4a641ac8 leds: trigger: implement a tty trigger

Usage is as follows:

	myled=ledname
	tty=ttyS0

	echo tty > /sys/class/leds/$myled/trigger
	echo $tty > /sys/class/leds/$myled/ttyname

. When this new trigger is active it periodically checks the tty's
statistics and when it changed since the last check the led is flashed
once.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210113173018.bq2fkea2o3yp6rf6@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-01-15 10:22:26 +01:00

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 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