post_install() {
  echo '--> Edit the MODULES array in /etc/mkinitcpio.conf to contain:'
  echo '--> MODULES=( aml_i2c rtc_pcf8563 ... )'
  echo '--> Then regenerate the boot image with: mkinitcpio -p linux-odroid-c2'

  # first time setup

  if lsmod | grep -q sx865x; then
    rmmod sx865x
  fi
  
  # even if loaded execute this has it is harmless and will exit with 0
  modprobe -a aml_i2c rtc_pcf8563

  # first time setup of device tree
  if [[ -f /boot/dtbs/meson64_odroidc2.dtb ]]; then
    fdtput -t s /boot/dtbs/meson64_odroidc2.dtb /i2c@c1108500/pcf8563@51 status "okay"
    # save the current time we assume is correct to the RTC chip
    hwclock -w
  else
    echo '--> ERROR: cannot locate meson64_odroidc2.dtb so quitting!'
    exit 1
  fi

}

post_remove() {
  echo '--> Optionally edit the MODULES array in /etc/mkinitcpio.conf'
  echo '--> to remove both aml_i2c and rtc_pcf8563'
  echo '--> Do not forget to regenerate the boot image with: mkinitcpio -p linux-odroid-c2'
}