netdev - [PATCH v2 net-next 8/9] net: dsa: felix: allow serdes configuration for dsa ports

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Date:   Fri, 17 Mar 2023 11:54:14 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-phy@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Vinod Koul <vkoul@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Lee Jones <lee@...nel.org>
Subject: [PATCH v2 net-next 8/9] net: dsa: felix: allow serdes configuration for dsa ports

Ports for Ocelot devices (VSC7511, VSC7512, VSC7513 and VSC7514) support
external phys. When external phys are used, additional configuration on
each port is required to enable QSGMII mode and set external phy modes.

Add a configurable hook into these routines, so the external ports can be
used.

Signed-off-by: Colin Foster <colin.foster@...advantage.com>
---

v2
    * New patch

---
 drivers/net/dsa/ocelot/felix.c | 4 ++++
 drivers/net/dsa/ocelot/felix.h | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 845068bcbeb4..6dcebcfd71e7 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -1585,6 +1585,10 @@ static int felix_setup(struct dsa_switch *ds)
 	dsa_switch_for_each_available_port(dp, ds) {
 		ocelot_init_port(ocelot, dp->index);
 
+		if (felix->info->configure_serdes)
+			felix->info->configure_serdes(ocelot, dp->index,
+						      dp->dn);
+
 		/* Set the default QoS Classification based on PCP and DEI
 		 * bits of vlan tag.
 		 */
diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h
index 98771273512b..96008c046da5 100644
--- a/drivers/net/dsa/ocelot/felix.h
+++ b/drivers/net/dsa/ocelot/felix.h
@@ -15,6 +15,8 @@
 #define OCELOT_PORT_MODE_USXGMII	BIT(4)
 #define OCELOT_PORT_MODE_1000BASEX	BIT(5)
 
+struct device_node;
+
 /* Platform-specific information */
 struct felix_info {
 	/* Hardcoded resources provided by the hardware instantiation. */
@@ -61,6 +63,8 @@ struct felix_info {
 	void	(*phylink_mac_config)(struct ocelot *ocelot, int port,
 				      unsigned int mode,
 				      const struct phylink_link_state *state);
+	int	(*configure_serdes)(struct ocelot *ocelot, int port,
+				    struct device_node *portnp);
 };
 
 /* Methods for initializing the hardware resources specific to a tagging
-- 
2.25.1