#!/usr/bin/sh

set -e
set -u

BOOT=$(/usr/bin/grep '/boot' '/etc/fstab' | /usr/bin/mawk '$1 !~ /^#/ && $2 ~ /^[/]/ {print $2}')
/usr/bin/test -n "${BOOT}"


case "${1}" in
  install)
    /usr/bin/echo '' >> "${BOOT}/config.txt"
    /usr/bin/echo '## pwm-2chan' >> "${BOOT}/config.txt"
    /usr/bin/echo '##    Load the Pulse-Width Modulation driver.' >> "${BOOT}/config.txt"
    /usr/bin/echo '##' >> "${BOOT}/config.txt"
    /usr/bin/echo 'dtoverlay=pwm-2chan' >> "${BOOT}/config.txt"
    /usr/bin/echo ''
    /usr/bin/echo '########################################################'
    /usr/bin/echo '#                                                      #'
    /usr/bin/echo '# ! Restart the device to load the necessary drivers ! #'
    /usr/bin/echo '#                                                      #'
    /usr/bin/echo '########################################################'
    /usr/bin/echo ''
  ;;
esac