[openwrt/openwrt] realtek: Skip auto-MAC assignment for devices with MACs in DT

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/3f7776a260a6c72832e3413eb3339f4c6f02b00b

commit 3f7776a260a6c72832e3413eb3339f4c6f02b00b
Author: Sven Eckelmann <se at simonwunderlich.de>
AuthorDate: Mon Sep 29 18:30:12 2025 +0200

    realtek: Skip auto-MAC assignment for devices with MACs in DT
    
    If the devicetree contains the appropriate nodes to configure the MAC
    addresses for each physical DSA port, then these MAC addresses must be used
    in OpenWrt and not some automatically generated ones. Otherwise the device
    often ends up with addresses which are locally administered and not
    matching any expected port-to-MAC scheme.
    
    Devices which only get the MAC address for eth0 must still auto-generate
    these MAC addresses until the devicetree was updated to also include the
    correct ones.
    
    Signed-off-by: Sven Eckelmann <se at simonwunderlich.de>
    Link: https://github.com/openwrt/openwrt/pull/20241
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/realtek/base-files/etc/board.d/02_network | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/target/linux/realtek/base-files/etc/board.d/02_network b/target/linux/realtek/base-files/etc/board.d/02_network
index 464ff976cf..b8e588f286 100644
--- a/target/linux/realtek/base-files/etc/board.d/02_network
+++ b/target/linux/realtek/base-files/etc/board.d/02_network
@@ -70,7 +70,10 @@ realtek_setup_macs()
 	plasmacloud,esx28|\
 	plasmacloud,psx8|\
 	plasmacloud,psx10|\
-	plasmacloud,psx28|\
+	plasmacloud,psx28)
+		lan_mac_start=skip
+		lan_mac="$(get_mac_label)"
+	;;
 	tplink,sg2008p-v1|\
 	tplink,sg2210p-v3|\
 	tplink,sg2452p-v4|\
@@ -102,7 +105,7 @@ realtek_setup_macs()
 	[ -n "$lan_mac" ] && ucidef_set_network_device_mac eth0 $lan_mac
 
 	[ -z "$lan_mac_start" -a -n "$lan_mac" ] && lan_mac_start=$lan_mac
-	realtek_setup_macs_lan "$lan_list" "$lan_mac_start" "$lan_mac_end"
+	[ "$lan_mac_start" != "skip" ] && realtek_setup_macs_lan "$lan_list" "$lan_mac_start" "$lan_mac_end"
 
 	[ -n "$label_mac" ] && ucidef_set_label_macaddr $label_mac
 }