[PATCH] ARM: dts: BCM5301X: AC9: set WAN MAC from nvram

From: Rosen Penev

Date: Mon Jul 27 2026 - 16:31:41 EST


The WAN MAC is offset by 1. Set in dts to avoid having to handle this in
userspace.

nvram size found from a random bootlog online.

Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
.../boot/dts/broadcom/bcm47189-tenda-ac9.dts | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/arch/arm/boot/dts/broadcom/bcm47189-tenda-ac9.dts b/arch/arm/boot/dts/broadcom/bcm47189-tenda-ac9.dts
index 3ac6cac541ca..8b2ad7683529 100644
--- a/arch/arm/boot/dts/broadcom/bcm47189-tenda-ac9.dts
+++ b/arch/arm/boot/dts/broadcom/bcm47189-tenda-ac9.dts
@@ -20,6 +20,16 @@ memory@0 {
reg = <0x00000000 0x08000000>;
};

+ nvram@1eff0000 {
+ compatible = "brcm,nvram";
+ reg = <0x1eff0000 0x10000>;
+
+ et0macaddr: et0macaddr {
+ #nvmem-cell-cells = <1>;
+ };
+ };
+
+
leds-0 {
compatible = "gpio-leds";

@@ -106,6 +116,16 @@ pcie0_chipcommon: chipcommon@0 {
};
};

+&gmac0 {
+ nvmem-cells = <&et0macaddr 0>;
+ nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+ nvmem-cells = <&et0macaddr 1>;
+ nvmem-cell-names = "mac-address";
+};
+
&switch {
status = "okay";

--
2.55.0