GPIO

The required kernel configuration options are:

• Device Drivers
  • [*] GPIO Support
    • [*] /sys/class/gpio/... (sysfs interface)
    • Memory mapped GPIO drivers
      • [*] Xilinx GPIO support
      • [*] Xilinx Zynq GPIO support

To wake up the APU on the GPIO pin:

$ echo enabled > /sys/devices/platform/gpio-keys/power/wakeup