From nobody Thu Oct 2 07:46:38 2025 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29149217659; Sun, 21 Sep 2025 16:06:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758470799; cv=none; b=ppna0aw/rgBXOMzdKwoe3BLL7PwgQECnsLMtAzrYhXf+Y8OzAu1VcmRFLW1isdgHYRIFFhgvbhrNivFPqbYsxr0d4cYNO5bzYWze67aueQhrvJyEqiqvQWVBJ0v30SqP8A/XZjh0aKVJUESuujaNN1meQJWGAiTa/ixMvfdEurg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758470799; c=relaxed/simple; bh=mxNKKeBXGKBUNR8BYD+IqMQnNtpJ62xKjUyrjGDUHB4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ItLw/R026kwYEzr2off+OEWB44EgKpkwcMyMAZ6oIuS/DZuqIRL9HXHKi2mq8Q6hwIUEzlYa8L4yvR4u8jcJVySSroZXyCnnpwNbP70RhaWujQdDz348f4f+MSsTOxWo7cImfahxTwQwDCrpNSoTiuEaL29egenTnb/70D/tdh8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=GvotMVmn; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="GvotMVmn" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id A5C311A053F; Sun, 21 Sep 2025 16:06:36 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 7B57B60634; Sun, 21 Sep 2025 16:06:36 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 89423102F17CA; Sun, 21 Sep 2025 18:06:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1758470795; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=3iQPgBitT0sQKwgb8teB2uqJP8R29q/Dxra69fQyLCY=; b=GvotMVmnIGWLlUVp8tWx4wBifolOSnThT54ER6bGYD56sGNFLf+Xj8RXbm7hmROqIXB3C6 A+89dxrIZK4ikCWkO84I+dNuwv7AZO8Tnr8QRblDNR7vVF0a04y3jNr+Zrg2+DSzhKS6F6 4n0qAykqkjN+A2c51CKb/qqPjHUQaMJTCkzyEOsE+8a5tCSy5QIVCMv1+hreKRHz6WALm0 75lr6uaqBEO5MISCsiqspM45Q54kYziB6kA+hlUHxmDIwcR2p3lv7dGctqVNzJNnhgUXW6 aGj4af3/j+c1c3PtVCbxygvOGhWHZXP7ZEQrhsBSN3ZgNStfgUnKQR7HnkhC5Q== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?UTF-8?q?K=C3=B6ry=20Maincent?= , =?UTF-8?q?Marek=20Beh=C3=BAn?= , Oleksij Rempel , =?UTF-8?q?Nicol=C3=B2=20Veronese?= , Simon Horman , mwojtas@chromium.org, Antoine Tenart , devicetree@vger.kernel.org, Conor Dooley , Krzysztof Kozlowski , Rob Herring , Romain Gantois , Daniel Golle , Dimitri Fedrau , Florian Fainelli Subject: [PATCH net-next v13 07/18] net: phy: Create a phy_port for PHY-driven SFPs Date: Sun, 21 Sep 2025 21:34:05 +0530 Message-ID: <20250921160419.333427-8-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250921160419.333427-1-maxime.chevallier@bootlin.com> References: <20250921160419.333427-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Content-Type: text/plain; charset="utf-8" Some PHY devices may be used as media-converters to drive SFP ports (for example, to allow using SFP when the SoC can only output RGMII). This is already supported to some extend by allowing PHY drivers to registers themselves as being SFP upstream. However, the logic to drive the SFP can actually be split to a per-port control logic, allowing support for multi-port PHYs, or PHYs that can either drive SFPs or Copper. To that extent, create a phy_port when registering an SFP bus onto a PHY. This port is considered a "serdes" port, in that it can feed data to anther entity on the link. The PHY driver needs to specify the various PHY_INTERFACE_MODE_XXX that this port supports. Reviewed-by: Christophe Leroy Tested-by: Oleksij Rempel Tested-by: Florian Fainelli Tested-by: Christophe Leroy Signed-off-by: Maxime Chevallier --- drivers/net/phy/phy_device.c | 24 ++++++++++++++++++++++++ drivers/net/phy/phy_port.c | 15 +++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index e8708bc9739c..786e20307943 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1631,6 +1631,26 @@ static void phy_del_port(struct phy_device *phydev, = struct phy_port *port) phydev->n_ports--; } =20 +static int phy_setup_sfp_port(struct phy_device *phydev) +{ + struct phy_port *port =3D phy_port_alloc(); + + if (!port) + return -ENOMEM; + + port->parent_type =3D PHY_PORT_PHY; + port->phy =3D phydev; + + /* The PHY is a media converter, the port connected to the SFP cage + * is a MII port. + */ + port->is_mii =3D true; + + phy_add_port(phydev, port); + + return 0; +} + /** * phy_sfp_probe - probe for a SFP cage attached to this PHY device * @phydev: Pointer to phy_device @@ -1652,6 +1672,10 @@ int phy_sfp_probe(struct phy_device *phydev, ret =3D sfp_bus_add_upstream(bus, phydev, ops); sfp_bus_put(bus); } + + if (phydev->sfp_bus) + ret =3D phy_setup_sfp_port(phydev); + return ret; } EXPORT_SYMBOL(phy_sfp_probe); diff --git a/drivers/net/phy/phy_port.c b/drivers/net/phy/phy_port.c index cf897ed74c4c..6fecaa68350e 100644 --- a/drivers/net/phy/phy_port.c +++ b/drivers/net/phy/phy_port.c @@ -113,6 +113,21 @@ void phy_port_update_supported(struct phy_port *port) phy_caps_medium_get_supported(supported, i, port->lanes); linkmode_or(port->supported, port->supported, supported); } + + /* Serdes ports supported through SFP may not have any medium set, + * as they will output PHY_INTERFACE_MODE_XXX modes. In that case, derive + * the supported list based on these interfaces + */ + if (port->is_mii && linkmode_empty(supported)) { + unsigned long interface, link_caps =3D 0; + + /* Get each interface's caps */ + for_each_set_bit(interface, port->interfaces, + PHY_INTERFACE_MODE_MAX) + link_caps |=3D phy_caps_from_interface(interface); + + phy_caps_linkmodes(link_caps, port->supported); + } } EXPORT_SYMBOL_GPL(phy_port_update_supported); =20 --=20 2.49.0