[openwrt/openwrt] realtek: actually enable 2500Base-X

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/15a4d621d84492b45fbc923053454322a8b58823

commit 15a4d621d84492b45fbc923053454322a8b58823
Author: Jan Hoffmann <jan at 3e8.eu>
AuthorDate: Thu Jul 24 19:29:23 2025 +0200

    realtek: actually enable 2500Base-X
    
    The SerDes setup function needs to be called to make 2500Base-X work.
    
    Signed-off-by: Jan Hoffmann <jan at 3e8.eu>
    Link: https://github.com/openwrt/openwrt/pull/19517
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c
index 85aa1975f2..1af34b4c5f 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c
@@ -678,6 +678,7 @@ static void rtl93xx_phylink_mac_config(struct dsa_switch *ds, int port,
 	if (sds_num >= 0 &&
 	    (state->interface == PHY_INTERFACE_MODE_1000BASEX ||
 	     state->interface == PHY_INTERFACE_MODE_SGMII ||
+	     state->interface == PHY_INTERFACE_MODE_2500BASEX ||
 	     state->interface == PHY_INTERFACE_MODE_10GBASER))
 		rtl9300_serdes_setup(port, sds_num, state->interface);
 }