target/linux/ath79/generic/base-files/lib/functions/mikrotik-caldata.sh


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# Copyright (C) 2019 Robert Marko <robimarko@gmail.com>
# Copyright (C) 2019 Roger Pueyo Centelles <roger.pueyo@guifi.net>
#
# Helper function to extract MAC addresses and calibration data for MikroTik
#

mikrotik_caldata_extract() {
	local part=$1
	local offset=$(($2))
	local count=$(($3))
	local mtd
	local erdfile="/lib/firmware/erd.bin"

	mtd=$(find_mtd_chardev $part)
	[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"

	rbextract -e $mtd $erdfile

	dd if=$erdfile of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
		caldata_die "failed to extract calibration data from $mtd"
}