Regards
Step to reproduce:
Code: Select all
# lsmod
Module Size Used by Tainted: G
fb_ili9488 12288 0
...
spi_atmel 16384 0 [permanent]
resistive_adc_touch 12288 0
# cat /sys/bus/iio/devices/iio\:device0/in_voltage7_raw
16352
# cat /dev/input/event0 &
# cat /sys/bus/iio/devices/iio\:device0/in_voltage7_raw
cat: read error: Device or resource busy
# ps aux
PID USER COMMAND
1 root init
2 root [kthreadd]
...
157 root cat /dev/input/event0
159 root ps aux
# kill 157
# cat /sys/bus/iio/devices/iio\:device0/in_voltage7_raw
16352