Comment 7 for bug 1229658

observed with Linaro android jellybean TI-panda builds:

https://android-build.linaro.org/builds/~linaro-android-member-ti/panda-linaro-13.09-release/#build=10

 "gpio" directory there is under /sys/class

root@pandaboard:/ # ls /sys/class
android_usb
backlight
bdi
block
bluetooth
bsg
display
firmware
gpio
graphics
i2c-adapter
i2c-dev
ieee80211
input
lcd
lirc
mbox
mdio_bus
mem
misc
mmc_host
net
power_supply
pvr
rc
regulator
rfkill
rtc
scsi_device
scsi_disk
scsi_host
sound
spi_master
switch
thermal
tiler
timed_output
tty
udc
usb_device
usbmon
vc
video4linux
vtconsole
root@pandaboard:/ #