diff --git a/target/linux/ath79/dts/qca955x_dlink_dap-2xxx.dtsi b/target/linux/ath79/dts/qca955x_dlink_dap-2xxx.dtsi
index 21fde53cc8..3e254fa494 100644
--- a/target/linux/ath79/dts/qca955x_dlink_dap-2xxx.dtsi
+++ b/target/linux/ath79/dts/qca955x_dlink_dap-2xxx.dtsi
@@ -46,6 +46,14 @@
 				label = "art";
 				reg = <0xff0000 0x10000>;
 				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cal_ath9k: calibration@1000 {
+					reg = <0x1000 0x440>;
+				};
 			};
 		};
 	};
@@ -54,5 +62,6 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
+	nvmem-cells = <&cal_ath9k>;
+	nvmem-cell-names = "calibration";
 };