arm64: dts: ti: k3-am62a: Add cpsw-mac-efuse node to wkup_conf

The WKUP system controller address region contains an eFuse block with
MAC addresses to be used by the Ethernet controller. The property
“ti,syscon-efuse” contains a phandle to a syscon region and an offset
into this region where the MAC addresses can be found. Currently
"ti,syscon-efuse" points to the entire system controller address space
node with an offset to the eFuse IP address.

Instead add a cpsw-mac-efuse node to describe the exact eFuse area. Then
point the Ethernet controller directly to this region, no offset needed.

This makes it so the system controller memory area does not need to be one
big syscon area, describe this bus address area as the simple-bus it is.

Signed-off-by: Andrew Davis <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vignesh Raghavendra <[email protected]>

Author: glneo

arch/arm64/boot/dts/ti/k3-am62a-main.dtsi

@@ -739,7 +739,7 @@
 				label = "port1";
 				phys = <&phy_gmii_sel 1>;
 				mac-address = [00 00 00 00 00 00];
-				ti,syscon-efuse = <&wkup_conf 0x200>;
+				ti,syscon-efuse = <&cpsw_mac_syscon 0x0>;
 			};
 
 			cpsw_port2: port@2 {

arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi

@@ -6,9 +6,8 @@
  */
 
 &cbass_wakeup {
-	wkup_conf: syscon@43000000 {
-		compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
-		reg = <0x00 0x43000000 0x00 0x20000>;
+	wkup_conf: bus@43000000 {
+		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00 0x00 0x43000000 0x20000>;
@@ -18,6 +17,11 @@
 			reg = <0x14 0x4>;
 		};
 
+		cpsw_mac_syscon: ethernet-mac-syscon@200 {
+			compatible = "ti,am62p-cpsw-mac-efuse", "syscon";
+			reg = <0x200 0x8>;
+		};
+
 		usb0_phy_ctrl: syscon@4008 {
 			compatible = "ti,am62-usb-phy-ctrl", "syscon";
 			reg = <0x4008 0x4>;