From: Trapti Damodar Balgi <traptidamodar.balgi@amd.com>
Date: Tue, 9 Jun 2026 07:48:16 +0000 (+0200)
Subject: arm64: zynqmp-dlc21-revA: add mac nvmem cell for gem0
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=336ac1481725741adeee40c9754b645e09aaffed;p=thirdparty%2Fu-boot.git

arm64: zynqmp-dlc21-revA: add mac nvmem cell for gem0

Enable nvmem support for MAC address retrieval from EEPROM for
ethernet@ff0b0000.
Add nvmem-cells and nvmem-cell-names to the GEM0 node, and define a
mac-address@20 cell under the EEPROM node on I2C0.

This allows U-Boot to read the MAC address from EEPROM at offset 0x20.

Signed-off-by: Trapti Damodar Balgi <traptidamodar.balgi@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/49490b1d510f27f47e71e86c7d1f29478111ef81.1780991287.git.michal.simek@amd.com
---

diff --git a/arch/arm/dts/zynqmp-dlc21-revA.dts b/arch/arm/dts/zynqmp-dlc21-revA.dts
index 25cd0a09c94..83c39ce1a26 100644
--- a/arch/arm/dts/zynqmp-dlc21-revA.dts
+++ b/arch/arm/dts/zynqmp-dlc21-revA.dts
@@ -90,6 +90,9 @@
 	status = "okay";
 	phy-handle = <&phy0>;
 	phy-mode = "sgmii"; /* DTG generates this properly  1512 */
+	nvmem-cells = <&eth_mac>;
+	nvmem-cell-names = "mac-address";
+
 	mdio: mdio {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -153,6 +156,12 @@
 	eeprom: eeprom@50 { /* u46 */
 		compatible = "atmel,24c32";
 		reg = <0x50>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		eth_mac: mac-address@20 {
+			reg = <0x20 0x6>;
+		};
 	};
 	/* u138 - TUSB320IRWBR - for USB-C */
 };