[openwrt/openwrt] ramips: restore full switch performance for USW-Flex

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch openwrt-24.10:
https://git.openwrt.org/a5eb5ee1a633f67ae44e43f211396a9f734268be

commit a5eb5ee1a633f67ae44e43f211396a9f734268be
Author: Anders Melchiorsen <amelchio at nogoto.net>
AuthorDate: Wed Jan 22 21:54:57 2025 +0100

    ramips: restore full switch performance for USW-Flex
    
    Since commit f1c9afd80138 ("ramips: mt7621-dts: mux phy0/4 to gmac1") the
    USW-Flex lan1 port has been attached directly to the CPU. This improves
    routing performance but hinders switching.
    
    This is a generally accepted trade-off in that commit but for USW-Flex it
    is a questionable choice. This switch is designed to deliver PoE to remote
    places and using it as a router is unlikely. Meanwhile, the lan1 port is
    also PoE-in and will often be the uplink, carrying most of the traffic.
    
    Reverting f1c9afd80138 for USW-Flex restores full 1 Gbps switching
    performance on all ports.
    
    Signed-off-by: Anders Melchiorsen <amelchio at nogoto.net>
    Link: https://github.com/openwrt/openwrt/pull/17703
    Signed-off-by: Robert Marko <robimarko at gmail.com>
    (cherry picked from commit 62872f8bfd5c8bc80bb014417c6ed8057bbeb773)
---
 target/linux/ramips/dts/mt7621_ubnt_usw-flex.dts | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/target/linux/ramips/dts/mt7621_ubnt_usw-flex.dts b/target/linux/ramips/dts/mt7621_ubnt_usw-flex.dts
index f2fb48cac2..f548f1f9b7 100644
--- a/target/linux/ramips/dts/mt7621_ubnt_usw-flex.dts
+++ b/target/linux/ramips/dts/mt7621_ubnt_usw-flex.dts
@@ -64,19 +64,6 @@
 	label = "dsa";
 };
 
-&gmac1 {
-	status = "okay";
-	label = "lan1";
-	phy-handle = <&ethphy4>;
-
-	nvmem-cells = <&macaddr_eeprom>;
-	nvmem-cell-names = "mac-address";
-};
-
-&ethphy4 {
-	/delete-property/ interrupts;
-};
-
 &switch0 {
 	ports {
 		port at 0 {
@@ -98,6 +85,11 @@
 			status = "okay";
 			label = "lan2";
 		};
+
+                port at 4 {
+                        status = "okay";
+                        label = "lan1";
+                };
 	};
 };