Hi I'm developing with imx28 (i.MX28) platform. BSP version is L2.6.35_10.12.01.
I'd like to access gpio port on user space.
So I did configuration of kernel. And I checked config file that show the flag "CONFIG_GPIO_SYSFS=y".
But I can't see the sysfs on /sys/class/gpio. This is my NFS mounted directory of Ubuntu host.
root@freescale /sys/class$ ls
backlight input net scsi_device vc
bdi leds power_supply scsi_disk video4linux
block mdio_bus raw scsi_host vtconsole
bsg mem rc sound
firmware misc regulator spi_master
graphics mmc_host rfkill tty
i2c-adapter mtd rtc ubi
After the configuration I rebuild the image. The image name rebuilt is rootfs.ext2.gz.
This is copy to NFS directory (/tools/rootfs).
Can anybody tell me how to access /sys/class/gpio sysfs.