linux-kernel - [PATCH RFC net-next 17/23] net: dsa: lantiq_gswip: move MDIO bus registration to .setup()

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Message-ID: <aKDiQhvQHzj56XBX@pidgin.makrotopia.org>
Date: Sat, 16 Aug 2025 20:55:46 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: 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>,
	Hauke Mehrtens <hauke@...ke-m.de>, Simon Horman <horms@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Florian Fainelli <f.fainelli@...il.com>,
	Arkadi Sharshevsky <arkadis@...lanox.com>,
	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 RFC net-next 17/23] net: dsa: lantiq_gswip: move MDIO bus
 registration to .setup()

Instead of registering the switch MDIO bus in the probe() function, move
the call to gswip_mdio() into the .setup() DSA switch op, so it can be
reused independently of the probe() function.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/dsa/lantiq_gswip.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 4641068d711b..6a263a0387d1 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -677,6 +677,13 @@ static int gswip_setup(struct dsa_switch *ds)
 	/* Configure the MDIO Clock 2.5 MHz */
 	gswip_mdio_mask(priv, 0xff, 0x09, GSWIP_MDIO_MDC_CFG1);
 
+	/* bring up the mdio bus */
+	err = gswip_mdio(priv);
+	if (err) {
+		dev_err(priv->dev, "mdio bus setup failed\n");
+		return err;
+	}
+
 	/* Disable the xMII interface and clear it's isolation bit */
 	for (i = 0; i < priv->hw_info->max_ports; i++)
 		gswip_mii_mask_cfg(priv,
@@ -2093,13 +2100,6 @@ static int gswip_probe(struct platform_device *pdev)
 					     "gphy fw probe failed\n");
 	}
 
-	/* bring up the mdio bus */
-	err = gswip_mdio(priv);
-	if (err) {
-		dev_err_probe(dev, err, "mdio probe failed\n");
-		goto gphy_fw_remove;
-	}
-
 	err = gswip_allocate_vlans(priv);
 	if (err)
 		goto gphy_fw_remove;
-- 
2.50.1