Comment 14 for bug 1229658

for Samsung Arndale board, with build:

https://android-build.linaro.org/builds/~linaro-android/arndale-linaro-14.04-release/#build=1

gpio file is not present under /sys/class

file structure under /sys/class

root@arndale:/sys/class # ls
ata_device
ata_link
ata_port
bdi
block
dma
firmware
graphics
i2c-adapter
input
mdio_bus
mem
misc
mmc_host
net
regulator
scsi_device
scsi_disk
scsi_generic
scsi_host
thermal
timed_output
tty
udc
vc
video4linux
vtconsole

so for that reason gpio info page not display on Arndale.