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[184.96.154.59]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7f41beef430sm3599463a34.5.2026.08.17.23.59.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 23:59:03 -0700 (PDT) From: James Hilliard Date: Tue, 18 Aug 2026 00:58:58 -0600 Subject: [PATCH net-next v3 2/4] net: mdio: link PHY package suppliers to member PHYs Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260818-submit-phy-package-fwdevlink-v1-v3-2-40a905ea16b6@gmail.com> References: <20260818-submit-phy-package-fwdevlink-v1-v3-0-40a905ea16b6@gmail.com> In-Reply-To: <20260818-submit-phy-package-fwdevlink-v1-v3-0-40a905ea16b6@gmail.com> To: Rob Herring , Saravana Kannan , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Jonathan Corbet , Shuah Khan , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Len Brown , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Christian Marangi Cc: devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, linux-acpi@vger.kernel.org, netdev@vger.kernel.org, James Hilliard X-Mailer: b4 0.15.2 Ethernet PHY package nodes describe resources shared by their member PHYs, but a package node is not instantiated as a device. Its firmware-node supplier links therefore cannot become normal device links for the PHY members without help from the MDIO layer. When registering an OF-backed PHY whose parent is an ethernet-phy-package node, copy the package supplier links onto the member's firmware node before the PHY device is added. The ordinary fw_devlink path then creates managed links after the PHY device has been initialized for link registration and before its driver can probe. Apply this to both ordinary OF discovery and the exported registration path for a pre-created PHY device. Leave the package links intact so every member, including one registered later, can acquire the same dependencies. This preserves probe, unbind and runtime-PM ordering without adding PHY-package policy to generic firmware parsing. Fixes: 385ef48f4686 ("net: phy: add support for scanning PHY in PHY packages nodes") Signed-off-by: James Hilliard --- Changes v2 -> v3: - Move PHY-package handling out of generic OF property parsing and into OF MDIO registration, as suggested by Saravana Kannan - Copy package supplier links before device_add() so the normal fw_devlink path creates real member links at the correct stage - Cover both normal OF discovery and pre-created PHY registration --- drivers/net/mdio/of_mdio.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/net/mdio/of_mdio.c b/drivers/net/mdio/of_mdio.c index b8d298c04d3f..ff540049b847 100644 --- a/drivers/net/mdio/of_mdio.c +++ b/drivers/net/mdio/of_mdio.c @@ -10,6 +10,7 @@ #include #include +#include #include #include #include @@ -34,9 +35,26 @@ static int of_get_phy_id(struct device_node *device, u32 *phy_id) return fwnode_get_phy_id(of_fwnode_handle(device), phy_id); } +static int of_mdiobus_link_phy_package(struct device_node *child) +{ + struct device_node *package __free(device_node) = of_get_parent(child); + + if (!package || !of_node_name_eq(package, "ethernet-phy-package")) + return 0; + + return fw_devlink_copy_suppliers(of_fwnode_handle(child), + of_fwnode_handle(package)); +} + int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy, struct device_node *child, u32 addr) { + int ret; + + ret = of_mdiobus_link_phy_package(child); + if (ret) + return ret; + return fwnode_mdiobus_phy_device_register(mdio, phy, of_fwnode_handle(child), addr); @@ -46,6 +64,12 @@ EXPORT_SYMBOL(of_mdiobus_phy_device_register); static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *child, u32 addr) { + int ret; + + ret = of_mdiobus_link_phy_package(child); + if (ret) + return ret; + return fwnode_mdiobus_register_phy(mdio, of_fwnode_handle(child), addr); } -- 2.53.0