Wayback when I was working on some project to wake up userspace program for every rising edge in GPIO pin (hall sensor), I use to send signal to the PID from kernel, before that userspace has to register its PID with kernel module. Max interrupts I have tested is some 100 times per second I.e. 100 times wakes up userspace application per second. It was working quite well.. But today also I don't know what other thing can be used for this case, as it is asynchronous.
Sent from my Android phone with Gmail. Please excuse my brevity.
On 08-Oct-2014 7:03 pm, "Greg KH" <greg@xxxxxxxxx> wrote:
On Wed, Oct 08, 2014 at 04:39:17PM +0900, manty kuma wrote:
> Hi,
> I want a user process to be notified on device wakeup so that I can print some
> related information.
Really? My device can "wakeup" thousands of times a second, what are
you going to do with that type of information?
> Which framework to use for this?(events, .. ??)
>
> One idea I get is to log the info into <debugfs> and poll(implement my poll) on
> it for data. This is my last option.
>
> Are there any better ways?
What problem are you trying to solve here?
thanks,
greg k-h
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
