Script for Galaxy S10e to overclock the flashlight LED

turboflash.sh

mytmpfolder="/dev/myowntmp" # it seems there is no /tmp, so let's make our own -- /dev is on a tmpfs, it is purged on reboot
mkdir -p "$mytmpfolder"

flashfile="/sys/class/camera/flash/rear_flash"
curval="$(cat "$mytmpfolder/turboflashval")"
curval="${curval:-0}"

HIGH_VAL=200
LOW_VAL=2003

function setFlash {
	echo "$1" > "$flashfile"
	echo "$1" > "$mytmpfolder/turboflashval"
	echo "Setting $1"
}

if [ "$1" = "t" ]; then
	if ( [ "$curval" -eq $LOW_VAL ] || [ "$curval" -eq 0 ] ); then
		setFlash $HIGH_VAL
	elif [ "$curval" -eq $HIGH_VAL ]; then
		setFlash 0
	fi
else
	if [ "$curval" -ne 0 ]; then
		setFlash 0
	else
		setFlash $LOW_VAL
	fi
fi