Messages in this thread | | | Subject | Re: [PATCH v3 3/3] leds: trigger: implement a tty trigger | From | Jacek Anaszewski <> | Date | Tue, 17 Dec 2019 21:27:13 +0100 |
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On 12/17/19 6:21 PM, Greg Kroah-Hartman wrote: > On Tue, Dec 17, 2019 at 05:23:13PM +0100, Uwe Kleine-König wrote: >> On Tue, Dec 17, 2019 at 04:27:24PM +0100, Greg Kroah-Hartman wrote: >>> On Tue, Dec 17, 2019 at 04:07:36PM +0100, Uwe Kleine-König wrote: >>>> Usage is as follows: >>>> >>>> myled=ledname >>>> tty=ttyS0 >>>> >>>> echo tty > /sys/class/leds/$myled/trigger >>>> cat /sys/class/tty/$tty/dev > /sys/class/leds/$myled/dev >>> >>> Is this the correct instructions? Aren't you looking for a major/minor >>> number instead in your sysfs file? >> >> This is correct, yes, at least it works as intended on my machine. >> >> /sys/class/tty/$tty/dev produces $major:$minor and that's what the >> led-trigger consumes. > > Ugh, nevermind, I totally read that wrong, I was thinking "echo" instead > of cat. My fault, what you wrote is correct. Should that be documented > somewhere in a Documentation/ABI/ file so that people know how to use > this new sysfs file? How are led triggers documented?
LED triggers have their corresponding entries in Documentation/ABI.
Uwe, you already did that for netdev trigger:
Documentation/ABI/testing/sysfs-class-led-trigger-netdev
It would be nice to have one for this too.
There are also less formal docs in Documentation/leds, e.g.:
Documentation/leds/ledtrig-usbport.rst
-- Best regards, Jacek Anaszewski
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