linux-kernel - [PATCH RFC net-next 13/23] net: dsa: lantiq_gswip: support model-specific mac_select

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Message-ID: <aKDiAb0tCBJw7N7K@pidgin.makrotopia.org>
Date: Sat, 16 Aug 2025 20:54:41 +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 13/23] net: dsa: lantiq_gswip: support
 model-specific mac_select_pcs()

Implement calling mac_select_pcs() function if provided in
struct gswip_hwinfo.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/dsa/lantiq_gswip.c | 13 +++++++++++++
 drivers/net/dsa/lantiq_gswip.h |  3 +++
 2 files changed, 16 insertions(+)

diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 5a5e85b1b32f..671f7b92b4aa 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -1675,12 +1675,25 @@ static bool gswip_support_eee(struct dsa_switch *ds, int port)
 	return false;
 }
 
+static struct phylink_pcs *gswip_phylink_mac_select_pcs(struct phylink_config *config,
+							phy_interface_t interface)
+{
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct gswip_priv *priv = dp->ds->priv;
+
+	if (priv->hw_info->mac_select_pcs)
+		return priv->hw_info->mac_select_pcs(config, interface);
+
+	return NULL;
+}
+
 const struct phylink_mac_ops gswip_phylink_mac_ops = {
 	.mac_config		= gswip_phylink_mac_config,
 	.mac_link_down		= gswip_phylink_mac_link_down,
 	.mac_link_up		= gswip_phylink_mac_link_up,
 	.mac_disable_tx_lpi	= gswip_phylink_mac_disable_tx_lpi,
 	.mac_enable_tx_lpi	= gswip_phylink_mac_enable_tx_lpi,
+	.mac_select_pcs		= gswip_phylink_mac_select_pcs,
 };
 
 static const struct dsa_switch_ops gswip_switch_ops = {
diff --git a/drivers/net/dsa/lantiq_gswip.h b/drivers/net/dsa/lantiq_gswip.h
index 00a786d374b1..24f6a94dd971 100644
--- a/drivers/net/dsa/lantiq_gswip.h
+++ b/drivers/net/dsa/lantiq_gswip.h
@@ -5,6 +5,7 @@
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/mutex.h>
+#include <linux/phylink.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
@@ -246,6 +247,8 @@ struct gswip_hw_info {
 	enum dsa_tag_protocol tag_protocol;
 	void (*phylink_get_caps)(struct dsa_switch *ds, int port,
 				 struct phylink_config *config);
+	struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config,
+					      phy_interface_t interface);
 };
 
 struct gswip_gphy_fw {
-- 
2.50.1