#!/bin/sh

PWM_PATH=/sys/class/pwm/pwmchip0

case "$1" in
  start)
    echo 0 > "${PWM_PATH}/export"
    echo 42000 > "${PWM_PATH}/pwm0/period"
    echo 42000 > "${PWM_PATH}/pwm0/duty_cycle"
		echo normal > "${PWM_PATH}/pwm0/polarity"
    echo 1 > "${PWM_PATH}/pwm0/enable"
    mkdir -p /run/backlight
    ln -s "${PWM_PATH}/pwm0/period" /run/backlight/max_brightness
    ln -s "${PWM_PATH}/pwm0/duty_cycle" /run/backlight/brightness

  ;;
  stop)
    echo 0 > "${PWM_PATH}/pwm0/enable"
    echo 0 > "${PWM_PATH}/unexport"
  ;;
  *)
    echo "Do or do not. There is no try"
    exit 1
  ;;
esac
