diff --git a/src/platform/telink/tlsr9528a_4m_flash.overlay b/src/platform/telink/tlsr9528a_4m_flash.overlay
index 0005da2..ec88c57 100644
--- a/src/platform/telink/tlsr9528a_4m_flash.overlay
+++ b/src/platform/telink/tlsr9528a_4m_flash.overlay
@@ -14,31 +14,35 @@
 		};
 		slot0_partition: partition@13000 {
 			label = "image-0";
-			reg = <0x13000 0x1ec000>;
+			reg = <0x13000 0x1ea000>;
 		};
-		factory_partition: partition@1ff000 {
-			label = "factory-data";
-			reg = <0x1ff000 0x1000>;
-		};
-		dac_keypair_partition: partition@200000 {
-			label = "dac-keypair";
-			reg = <0x200000 0x1000>; //store dac and key pair.
-		};
-		descriptor_partition: partition@201000 {
-			label = "sboot-descriptor";
-			reg = <0x201000 0x2000>;
-		};
-		storage_partition: partition@203000 {
-			label = "storage";
-			reg = <0x203000 0xf000>;
-		};
-		slot1_partition: partition@212000 {
+		slot1_partition: partition@1fd000 {
 			label = "image-1";
-			reg = <0x212000 0x1ec000>;
+			reg = <0x1fd000 0x1ea000>;
+		};
+		storage_partition: partition@3e7000 {
+			label = "storage";
+			reg = <0x3e7000 0xf000>; // matter nvs part 
+		};
+		dac_keypair_partition: partition@3f6000 {
+			label = "dac-keypair";
+			reg = <0x3f6000 0x1000>; //store dac and key pair.
+		};
+		factory_partition: partition@3f7000 {
+			label = "factory-data";
+			reg = <0x3f7000 0x1000>; // factory data info 
+		};
+		secure_partition: partition@3f8000 {
+ 			label = "secure";
+			reg = <0x3f8000 0x4000>; //secure info ,reserved for secure boot .if not use , can be used by other way .
+ 		};
+		vendor_rfu_partition: partition@3fc000 {
+			label = "vendor-rfu";
+			reg = <0x3fc000 0x2000>;// reserved for chip extend.
 		};
 		vendor_partition: partition@3fe000 {
 			label = "vendor-data";
-			reg = <0x3fe000 0x2000>;
+			reg = <0x3fe000 0x2000>;// mac and adc info.
 		};
 	};
 };