Re: Gpio interrupt shall pass the signal to application

[jeshwanth Kumar N K]

Hi Fabio,

Thanks for the reply. Ya I got your point, and I did the same thing by exporting the sysfs gpio and poll for value attribute It works fine but the thing is time. Actually my interrupts may be every 50 micro seconds. So I thought of dealing in kernel mode itself. What's your suggestion ?
Sent from my HTC

----- Reply message -----
From: "Fabio Pozzi" <pozzi.fabio at gmail.com>
Date: Sat, Oct 6, 2012 2:29 pm
Subject: Gpio interrupt shall pass the signal to application
To: "jeshwanth Kumar N K" <jeshkumar555 at gmail.com>
Cc: "kernelnewbies" <kernelnewbies at kernelnewbies.org>


I think you could use sysfs_notify to send the notification and use
select() or poll() to wait for changes in the sysfs file in the interrupt
handler routine. You can find an example of this in the gpio-fan driver.
Hope it helps

-- 
Saluti,
Fabio Pozzi
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