Messages in this thread |  | | Date | Mon, 10 Oct 2016 16:25:05 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH V4] leds: trigger: Introduce an USB port trigger |
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Hi!
> This commit adds a new trigger responsible for turning on LED when USB > device gets connected to the specified USB port. This can can useful for > various home routers that have USB port(s) and a proper LED telling user > a device is connected. > > The trigger gets its documentation file but basically it just requires > specifying USB port in a Linux format (e.g. echo 1-1 > new_port). > > During work on this trigger there was a plan to add DT bindings for it, > but there wasn't an agreement on the format yet. This can be worked on > later, a sysfs interface is needed anyway for platforms not using DT. > > Another planned feature is support for LED reacting to the USB activity. > This can be implemented with another sysfs file for setting mode. The > default mode wouldn't change so there won't be ABI breakage and such > feature can be safely implemented later.
Actually... USB device plugs/unplugs are pretty rare events... Can we just do this in userspace using udevd?
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [unhandled content-type:application/pgp-signature] |  |