base-file: Add mmc support (#8329)

package/base-files/files/lib/functions.sh

@@ -313,6 +313,25 @@ find_mtd_part() {
 	echo "${INDEX:+$PREFIX$INDEX}"
 }
 
+find_mmc_part() {
+	local DEVNAME PARTNAME ROOTDEV
+
+	if grep -q "$1" /proc/mtd; then
+		echo "" && return 0
+	fi
+
+	if [ -n "$2" ]; then
+		ROOTDEV="$2"
+	else
+		ROOTDEV="mmcblk*"
+	fi
+
+	for DEVNAME in /sys/block/$ROOTDEV/mmcblk*p*; do
+		PARTNAME="$(grep PARTNAME ${DEVNAME}/uevent | cut -f2 -d'=')"
+		[ "$PARTNAME" = "$1" ] && echo "/dev/$(basename $DEVNAME)" && return 0
+	done
+}
+
 group_add() {
 	local name="$1"
 	local gid="$2"

package/base-files/files/lib/functions/caldata.sh

@@ -48,6 +48,19 @@ caldata_extract_ubi() {
 		caldata_die "failed to extract calibration data from $ubi"
 }
 
+caldata_extract_mmc() {
+	local part=$1
+	local offset=$(($2))
+	local count=$(($3))
+	local mmc_part
+
+	mmc_part=$(find_mmc_part $part)
+	[ -n "$mmc_part" ] || caldata_die "no mmc partition found for partition $part"
+
+	caldata_dd $mmc_part /lib/firmware/$FIRMWARE $count $offset || \
+		caldata_die "failed to extract calibration data from $mmc_part"
+}
+
 caldata_extract_reverse() {
 	local part=$1
 	local offset=$2

package/base-files/files/lib/functions/system.sh

@@ -79,6 +79,24 @@ mtd_get_mac_ascii() {
 	[ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 }
 
+mtd_get_mac_ascii_mmc() {
+	local mtdname="$1"
+	local key="$2"
+	local part
+	local mac_dirty
+
+	part=$(find_mmc_part "$mtdname")
+	if [ -z "$part" ]; then
+		echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
+		return
+	fi
+
+	mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
+
+	# "canonicalize" mac
+	[ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
+}
+
 mtd_get_mac_text() {
 	local mtdname=$1
 	local offset=$(($2))
@@ -123,6 +141,15 @@ mtd_get_mac_binary_ubi() {
 	get_mac_binary "/dev/$part" "$offset"
 }
 
+mtd_get_mac_binary_mmc() {
+	local mtdname="$1"
+	local offset="$2"
+	local part
+
+	part=$(find_mmc_part "$mtdname")
+	get_mac_binary "$part" "$offset"
+}
+
 mtd_get_part_size() {
 	local part_name=$1
 	local first dev size erasesize name