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| author |   Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-01-13 18:30:18 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-15 10:22:26 +0100 |
| commit | fd4a641ac88fbbaf8b90e00823397597a287cfcd (patch) | |
| tree | 94894d04476fe2db405ccb58a4ae0a15a521c918 /drivers/leds/trigger/Kconfig | |
| parent | tty: vcc: Drop impossible to hit WARN_ON (diff) | |
| download | linux-dev-fd4a641ac88fbbaf8b90e00823397597a287cfcd.tar.xz linux-dev-fd4a641ac88fbbaf8b90e00823397597a287cfcd.zip | |
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>
Diffstat (limited to 'drivers/leds/trigger/Kconfig')
| -rw-r--r-- | drivers/leds/trigger/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig index ce9429ca6dde..b77a01bd27f4 100644 --- a/drivers/leds/trigger/Kconfig +++ b/drivers/leds/trigger/Kconfig @@ -144,4 +144,13 @@ config LEDS_TRIGGER_AUDIO the audio mute and mic-mute changes. If unsure, say N +config LEDS_TRIGGER_TTY + tristate "LED Trigger for TTY devices" + depends on TTY + help + This allows LEDs to be controlled by activity on ttys which includes + serial devices like /dev/ttyS0. + + When build as a module this driver will be called ledtrig-tty. + endif # LEDS_TRIGGERS |