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# fd4a641a 13-Jan-2021 Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

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 trigge

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>

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