[openwrt/openwrt] ath79: TP-link Archer C7v2: use fixed-link for AR8327 switch connection

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/c61a6efdf514e2c6198e476a742eff339a071230

commit c61a6efdf514e2c6198e476a742eff339a071230
Author: Lech Perczak <lech.perczak at gmail.com>
AuthorDate: Tue Feb 4 21:15:16 2025 +0100

    ath79: TP-link Archer C7v2: use fixed-link for AR8327 switch connection
    
    Attaching PHY driver to the switch, while adding LEDs binding causes the
    PHY driver to create additional LED instances, handled incorrectly by
    the PHY driver, which are non-functional. Use fixed-link to attach the
    switch driver, instead of PHY driver, to prevent that.
    
    This has a side effect of not logging switch port up/down events in the kernel
    log.
    
    Signed-off-by: Lech Perczak <lech.perczak at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/12487
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/ath79/dts/qca9558_tplink_archer-c.dtsi | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/target/linux/ath79/dts/qca9558_tplink_archer-c.dtsi b/target/linux/ath79/dts/qca9558_tplink_archer-c.dtsi
index 221582e66d..c1bd3f759b 100644
--- a/target/linux/ath79/dts/qca9558_tplink_archer-c.dtsi
+++ b/target/linux/ath79/dts/qca9558_tplink_archer-c.dtsi
@@ -115,8 +115,9 @@
 &mdio0 {
 	status = "okay";
 
-	phy0: ethernet-phy at 0 {
-		reg = <0>;
+	switch at 1f {
+		compatible = "qca,ar8327";
+		reg = <0x1f>;
 
 		qca,ar8327-initvals = <
 			0x04 0x00080080 /* PORT0 PAD MODE CTRL */
@@ -134,9 +135,13 @@
 &eth0 {
 	status = "okay";
 
-	phy-handle = <&phy0>;
 	pll-data = <0x56000000 0x00000101 0x00001616>;
 
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+
 	gmac-config {
 		device = <&gmac>;
 		rgmii-enabled = <1>;