netdev - [PATCH net-next 12/13] net: phy: dp83822: Add SFP support through the phy

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Message-ID: <20250207223634.600218-13-maxime.chevallier@bootlin.com>
Date: Fri,  7 Feb 2025 23:36:31 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: davem@...emloft.net
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	thomas.petazzoni@...tlin.com,
	Andrew Lunn <andrew@...n.ch>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Herve Codina <herve.codina@...tlin.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Köry Maincent <kory.maincent@...tlin.com>,
	Marek Behún <kabel@...nel.org>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Nicolò Veronese <nicveronese@...il.com>,
	Simon Horman <horms@...nel.org>,
	mwojtas@...omium.org,
	Antoine Tenart <atenart@...nel.org>,
	devicetree@...r.kernel.org,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Romain Gantois <romain.gantois@...tlin.com>
Subject: [PATCH net-next 12/13] net: phy: dp83822: Add SFP support through the phy_port interface

The DP83822 can support 100BaseFX. This mode was only accessible through
custom DT properties, but there also exist SFP modules that support
these modes. As this only requires setting the relevant supported
interface in the driver, expose the port capability with the new
phy_port API, allowing SFP support.

Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
---
 drivers/net/phy/dp83822.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index af535b0a3914..873ba467cd57 100644
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -908,6 +908,13 @@ static int dp83822_attach_port(struct phy_device *phydev, struct phy_port *port)
 		}
 	}
 
+	/* If attached from SFP, is_serdes is set, but not the mediums. */
+	if (port->is_serdes)
+		dp83822->fx_enabled = true;
+
+	if (dp83822->fx_enabled)
+		__set_bit(PHY_INTERFACE_MODE_100BASEFX, interfaces);
+
 	return 0;
 }
 
-- 
2.48.1