diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh
index fb3a3b6d1..46311ae0c 100644
--- a/package/base-files/files/lib/functions/system.sh
+++ b/package/base-files/files/lib/functions/system.sh
@@ -250,4 +250,8 @@ macaddr_canonicalize() {
 	[ ${#canon} -ne 17 ] && return
 
 	printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
-}
\ No newline at end of file
+}
+
+dt_is_enabled() {
+	grep -q okay "/proc/device-tree/$1/status"
+}
diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index 13d156ae5..41220f5a4 100644
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -629,6 +629,21 @@ ucidef_set_ntpserver() {
 	json_select ..
 }
 
+ucidef_add_wlan() {
+	local path="$1"; shift
+
+	ucidef_wlan_idx=${ucidef_wlan_idx:-0}
+
+	json_select_object wlan
+	json_select_object "wl$ucidef_wlan_idx"
+	json_add_string path "$path"
+	json_add_fields "$@"
+	json_select ..
+	json_select ..
+
+	ucidef_wlan_idx="$((ucidef_wlan_idx + 1))"
+}
+
 board_config_update() {
 	json_init
 	[ -f ${CFG} ] && json_load "$(cat ${CFG})"