ramips: mt7621: convert Linksys devices EEPROM to NVMEM format

-+-----------------------------+-
 |    Model   |       NIC      |
-+-----------------------------+-
 | EA6350 v4 | MT7603 + MT7613 |
-+-----------------------------+-
 | EA7300 v2 | MT7603 + MT7615 |
-+-----------------------------+-
 |  Others   |    MT7615 *2    |
-+-----------------------------+-

Signed-off-by: Shiji Yang <[email protected]>

target/linux/ramips/dts/mt7621_linksys_ea6350-v4.dts

@@ -7,6 +7,11 @@
 	model = "Linksys EA6350 v4";
 };
 
+/* override EEPROM size to 0x400 for MT7603 */
+&eeprom_factory_0 {
+	reg = <0x0 0x400>;
+};
+
 &gmac1 {
 	phy-handle = <&ethphy4>;
 };

target/linux/ramips/dts/mt7621_linksys_ea7300-v2.dts

@@ -6,3 +6,8 @@
 	compatible = "linksys,ea7300-v2", "mediatek,mt7621-soc";
 	model = "Linksys EA7300 v2";
 };
+
+/* override EEPROM size to 0x400 for MT7603 */
+&eeprom_factory_0 {
+	reg = <0x0 0x400>;
+};

target/linux/ramips/dts/mt7621_linksys_ea7xxx.dtsi

@@ -101,6 +101,20 @@
 			label = "factory";
 			reg = <0xc0000 0x40000>;
 			read-only;
+
+			nvmem-layout {
+				compatible = "fixed-layout";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				eeprom_factory_0: eeprom@0 {
+					reg = <0x0 0x4da8>;
+				};
+
+				eeprom_factory_8000: eeprom@8000 {
+					reg = <0x8000 0x4da8>;
+				};
+			};
 		};
 
 		partition@100000 {
@@ -165,7 +179,8 @@
 	mt76@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x0000>;
+		nvmem-cells = <&eeprom_factory_0>;
+		nvmem-cell-names = "eeprom";
 	};
 };
 
@@ -173,7 +188,8 @@
 	mt76@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x8000>;
+		nvmem-cells = <&eeprom_factory_8000>;
+		nvmem-cell-names = "eeprom";
 	};
 };