1 // SPDX-License-Identifier: GPL-2.0-only
3  * OF helpers for the MDIO (Ethernet PHY) API
28 MODULE_DESCRIPTION("OpenFirmware MDIO bus (Ethernet PHY) accessors");
31  * ethernet-phy-idAAAA.BBBB */
37 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,  in of_mdiobus_phy_device_register()  argument
40 	return fwnode_mdiobus_phy_device_register(mdio, phy,  in of_mdiobus_phy_device_register()
46 static int of_mdiobus_register_phy(struct mii_bus *mdio,  in of_mdiobus_register_phy()  argument
49 	return fwnode_mdiobus_register_phy(mdio, of_fwnode_handle(child), addr);  in of_mdiobus_register_phy()
52 static int of_mdiobus_register_device(struct mii_bus *mdio,  in of_mdiobus_register_device()  argument
59 	mdiodev = mdio_device_create(mdio, addr);  in of_mdiobus_register_device()
67 	device_set_node(&mdiodev->dev, fwnode);  in of_mdiobus_register_device()
72 		device_set_node(&mdiodev->dev, NULL);  in of_mdiobus_register_device()
78 	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",  in of_mdiobus_register_device()
80 	return 0;  in of_mdiobus_register_device()
86  * to have a compatible string, so they can be matched to an MDIO
90 	{ .compatible = "brcm,40nm-ephy" },
100 	{ .compatible = "moxa,moxart-rtl8201cp", },
106  * o Compatible string of "ethernet-phy-idX.X"
107  * o Compatible string of "ethernet-phy-ieee802.3-c45"
108  * o Compatible string of "ethernet-phy-ieee802.3-c22"
119 	if (of_get_phy_id(child, &phy_id) != -EINVAL)  in of_mdiobus_child_is_phy()
122 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))  in of_mdiobus_child_is_phy()
125 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))  in of_mdiobus_child_is_phy()
142 static int __of_mdiobus_parse_phys(struct mii_bus *mdio, struct device_node *np,  in __of_mdiobus_parse_phys()  argument
146 	int addr, rc = 0;  in __of_mdiobus_parse_phys()
150 		if (of_node_name_eq(child, "ethernet-phy-package")) {  in __of_mdiobus_parse_phys()
151 			/* Ignore invalid ethernet-phy-package node */  in __of_mdiobus_parse_phys()
155 			rc = __of_mdiobus_parse_phys(mdio, child, NULL);  in __of_mdiobus_parse_phys()
156 			if (rc && rc != -ENODEV)  in __of_mdiobus_parse_phys()
162 		addr = of_mdio_parse_addr(&mdio->dev, child);  in __of_mdiobus_parse_phys()
163 		if (addr < 0) {  in __of_mdiobus_parse_phys()
164 			/* Skip scanning for invalid ethernet-phy-package node */  in __of_mdiobus_parse_phys()
171 			rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_parse_phys()
173 			rc = of_mdiobus_register_device(mdio, child, addr);  in __of_mdiobus_parse_phys()
175 		if (rc == -ENODEV)  in __of_mdiobus_parse_phys()
176 			dev_err(&mdio->dev,  in __of_mdiobus_parse_phys()
177 				"MDIO device at address %d is missing.\n",  in __of_mdiobus_parse_phys()
183 	return 0;  in __of_mdiobus_parse_phys()
190  * __of_mdiobus_register - Register mii_bus and create PHYs from the device tree
191  * @mdio: pointer to mii_bus structure
192  * @np: pointer to device_node of MDIO bus.
193  * @owner: module owning the @mdio object.
198 int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,  in __of_mdiobus_register()  argument
206 		return __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
210 		return -ENODEV;  in __of_mdiobus_register()
214 	mdio->phy_mask = ~0;  in __of_mdiobus_register()
216 	device_set_node(&mdio->dev, of_fwnode_handle(np));  in __of_mdiobus_register()
219 	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;  in __of_mdiobus_register()
220 	of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);  in __of_mdiobus_register()
221 	mdio->reset_post_delay_us = 0;  in __of_mdiobus_register()
222 	of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);  in __of_mdiobus_register()
224 	/* Register the MDIO bus */  in __of_mdiobus_register()
225 	rc = __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
230 	rc = __of_mdiobus_parse_phys(mdio, np, &scanphys);  in __of_mdiobus_register()
235 		return 0;  in __of_mdiobus_register()
239 		/* Skip PHYs with reg property set or ethernet-phy-package node */  in __of_mdiobus_register()
241 		    of_node_name_eq(child, "ethernet-phy-package"))  in __of_mdiobus_register()
244 		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {  in __of_mdiobus_register()
246 			if (mdiobus_is_registered_device(mdio, addr))  in __of_mdiobus_register()
250 			dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",  in __of_mdiobus_register()
254 				/* -ENODEV is the return code that PHYLIB has  in __of_mdiobus_register()
258 				rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_register()
261 				if (rc != -ENODEV)  in __of_mdiobus_register()
267 	return 0;  in __of_mdiobus_register()
272 	mdiobus_unregister(mdio);  in __of_mdiobus_register()
278  * of_mdio_find_device - Given a device tree node, find the mdio_device
292  * of_phy_find_device - Give a PHY node, find the phy_device
305  * of_phy_connect - Connect to the phy described in the device tree
327 	phy->dev_flags |= flags;  in of_phy_connect()
332 	put_device(&phy->mdio.dev);  in of_phy_connect()
340  * - Get phy node and connect to the phy described in the device tree
363 		if (ret < 0) {  in of_phy_get_and_connect()
364 			netdev_err(dev, "broken fixed-link specification\n");  in of_phy_get_and_connect()
369 		phy_np = of_parse_phandle(np, "phy-handle", 0);  in of_phy_get_and_connect()
374 	phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);  in of_phy_get_and_connect()
385  * - the old DT binding, where 'fixed-link' was a property with 5
387  * - the new DT binding, where 'fixed-link' is a sub-node of the
397 	dn = of_get_child_by_name(np, "fixed-link");  in of_phy_is_fixed_link()
404 	if (err == 0 && strcmp(managed, "auto") != 0)  in of_phy_is_fixed_link()
408 	if (of_property_count_u32_elems(np, "fixed-link") == 5)  in of_phy_is_fixed_link()
422 	if (of_property_read_string(np, "managed", &managed) == 0 &&  in of_phy_register_fixed_link()
423 	    strcmp(managed, "in-band-status") == 0) {  in of_phy_register_fixed_link()
429 	fixed_link_node = of_get_child_by_name(np, "fixed-link");  in of_phy_register_fixed_link()
433 						      "full-duplex");  in of_phy_register_fixed_link()
437 			return -EINVAL;  in of_phy_register_fixed_link()
441 							  "asym-pause");  in of_phy_register_fixed_link()
448 	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,  in of_phy_register_fixed_link()
449 				       ARRAY_SIZE(fixed_link_prop)) == 0) {  in of_phy_register_fixed_link()
458 	return -ENODEV;  in of_phy_register_fixed_link()
475 	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */  in of_phy_deregister_fixed_link()