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
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