// SPDX-License-Identifier: GPL-2.0-only /* * fwnode helpers for the MDIO (Ethernet PHY) API * * This file provides helper functions for extracting PHY device information * out of the fwnode and using it to populate an mii_bus. */ #include #include #include #include MODULE_AUTHOR("Calvin Johnson "); MODULE_LICENSE("GPL"); static struct mii_timestamper * fwnode_find_mii_timestamper(struct fwnode_handle *fwnode) { struct of_phandle_args arg; int err; if (is_acpi_node(fwnode)) return NULL; err = of_parse_phandle_with_fixed_args(to_of_node(fwnode), "timestamper", 1, 0, &arg); if (err == -ENOENT) return NULL; else if (err) return ERR_PTR(err); if (arg.args_count != 1) return ERR_PTR(-EINVAL); return register_mii_timestamper(arg.np, arg.args[0]); } int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy, struct fwnode_handle *child, u32 addr) { int rc; rc = fwnode_irq_get(child, 0); /* Don't wait forever if the IRQ provider doesn't become available, * just fall back to poll mode */ if (rc == -EPROBE_DEFER) rc = driver_deferred_probe_check_state(&phy->mdio.dev); if (rc == -EPROBE_DEFER) return rc; if (rc > 0) { phy->irq = rc; mdio->irq[addr] = rc; } else { phy->irq = mdio->irq[addr]; } if (fwnode_property_read_bool(child, "broken-turn-around")) mdio->phy_ignore_ta_mask |= 1 << addr; fwnode_property_read_u32(child, "reset-assert-us", &phy->mdio.reset_assert_delay); fwnode_property_read_u32(child, "reset-deassert-us", &phy->mdio.reset_deassert_delay); /* Associate the fwnode with the device structure so it * can be looked up later */ fwnode_handle_get(child); device_set_node(&phy->mdio.dev, child); /* All data is now stored in the phy struct; * register it */ rc = phy_device_register(phy); if (rc) { device_set_node(&phy->mdio.dev, NULL); fwnode_handle_put(child); return rc; } dev_dbg(&mdio->dev, "registered phy %p fwnode at address %i\n", child, addr); return 0; } EXPORT_SYMBOL(fwnode_mdiobus_phy_device_register); int fwnode_mdiobus_register_phy(struct mii_bus *bus, struct fwnode_handle *child, u32 addr) { struct mii_timestamper *mii_ts = NULL; struct phy_device *phy; bool is_c45 = false; u32 phy_id; int rc; mii_ts = fwnode_find_mii_timestamper(child); if (IS_ERR(mii_ts)) return PTR_ERR(mii_ts); rc = fwnode_property_match_string(child, "compatible", "ethernet-phy-ieee802.3-c45"); if (rc >= 0) is_c45 = true; if (is_c45 || fwnode_get_phy_id(child, &phy_id)) phy = get_phy_device(bus, addr, is_c45); else phy = phy_device_create(bus, addr, phy_id, 0, NULL); if (IS_ERR(phy)) { rc = PTR_ERR(phy); goto clean_mii_ts; } if (is_acpi_node(child)) { phy->irq = bus->irq[addr]; /* Associate the fwnode with the device structure so it * can be looked up later. */ phy->mdio.dev.fwnode = fwnode_handle_get(child); /* All data is now stored in the phy struct, so register it */ rc = phy_device_register(phy); if (rc) { phy->mdio.dev.fwnode = NULL; fwnode_handle_put(child); goto clean_phy; } } else if (is_of_node(child)) { rc = fwnode_mdiobus_phy_device_register(bus, phy, child, addr); if (rc) goto clean_phy; } /* phy->mii_ts may already be defined by the PHY driver. A * mii_timestamper probed via the device tree will still have * precedence. */ if (mii_ts) phy->mii_ts = mii_ts; return 0; clean_phy: phy_device_free(phy); clean_mii_ts: unregister_mii_timestamper(mii_ts); return rc; } EXPORT_SYMBOL(fwnode_mdiobus_register_phy);