On 11/04/2014 12:44 PM, Vignesh R wrote:

I ran following commands
$ evtest /dev/input/touchscreen0 &
(with heavy item on touchscreen)
 and
$ cat /sys/bus/iio/devices/iio\:device0/scan_elements/in_voltage4_en
(in a busy loop)
I tried above experiment on my board but I didn't hit any problem even
after running for close to 30 minutes. I was unable to reproduce failure

Just to make sure: You had the touchscreen and iio command running in
parallel and you saw evtest output while there was iio operation?

The problem may be in configuring correct charge-delay value. Please run:
$ ts_test > /dev/null
and let me know if pen events are being detected properly.

Well I get the touch events but not while busy loop on iio interface is
running (I get maybe one event every 5 seconds or so).
After all, it is the same HW you have.

Sebastian