linux-kernel - [PATCH net-next 3/6] net: dsa: lantiq_gswip: ignore SerDes modes in phylink_mac

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Message-ID: <374cb3a2d857cd6c197d4eabbd4af5cfb0c96935.1756163848.git.daniel@makrotopia.org>
Date: Tue, 26 Aug 2025 01:12:23 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Hauke Mehrtens <hauke@...ke-m.de>, Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Cc: Andreas Schirm <andreas.schirm@...mens.com>,
	Lukas Stockmann <lukas.stockmann@...mens.com>,
	Alexander Sverdlin <alexander.sverdlin@...mens.com>,
	Peter Christen <peter.christen@...mens.com>,
	Avinash Jayaraman <ajayaraman@...linear.com>,
	Bing tao Xu <bxu@...linear.com>, Liang Xu <lxu@...linear.com>,
	Juraj Povazanec <jpovazanec@...linear.com>,
	"Fanni (Fang-Yi) Chan" <fchan@...linear.com>,
	"Benny (Ying-Tsan) Weng" <yweng@...linear.com>,
	"Livia M. Rosu" <lrosu@...linear.com>,
	John Crispin <john@...ozen.org>
Subject: [PATCH net-next 3/6] net: dsa: lantiq_gswip: ignore SerDes modes in
 phylink_mac_config()

We can safely ignore SerDes interface modes 1000Base-X, 2500Base-X and
SGMII in phylink_mac_config() as they are being taken care of by the
PCS.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/dsa/lantiq_gswip.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 4822812bba27..7ffaa6481271 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -1444,6 +1444,10 @@ static void gswip_phylink_mac_config(struct phylink_config *config,
 	miicfg |= GSWIP_MII_CFG_LDCLKDIS;
 
 	switch (state->interface) {
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_1000BASEX:
+	case PHY_INTERFACE_MODE_2500BASEX:
+		return;
 	case PHY_INTERFACE_MODE_MII:
 	case PHY_INTERFACE_MODE_INTERNAL:
 		miicfg |= GSWIP_MII_CFG_MODE_MIIM;
-- 
2.50.1