1 // SPDX-License-Identifier: GPL-2.0-only
3  * OF helpers for the MDIO (Ethernet PHY) API
30  * ethernet-phy-idAAAA.BBBB */
36 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,  in of_mdiobus_phy_device_register()  argument
39 	return fwnode_mdiobus_phy_device_register(mdio, phy,  in of_mdiobus_phy_device_register()
45 static int of_mdiobus_register_phy(struct mii_bus *mdio,  in of_mdiobus_register_phy()  argument
48 	return fwnode_mdiobus_register_phy(mdio, of_fwnode_handle(child), addr);  in of_mdiobus_register_phy()
51 static int of_mdiobus_register_device(struct mii_bus *mdio,  in of_mdiobus_register_device()  argument
58 	mdiodev = mdio_device_create(mdio, addr);  in of_mdiobus_register_device()
66 	device_set_node(&mdiodev->dev, fwnode);  in of_mdiobus_register_device()
71 		device_set_node(&mdiodev->dev, NULL);  in of_mdiobus_register_device()
77 	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",  in of_mdiobus_register_device()
79 	return 0;  in of_mdiobus_register_device()
85  * to have a compatible string, so they can be matched to an MDIO
89 	{ .compatible = "brcm,40nm-ephy" },
99 	{ .compatible = "moxa,moxart-rtl8201cp", },
105  * o Compatible string of "ethernet-phy-idX.X"
106  * o Compatible string of "ethernet-phy-ieee802.3-c45"
107  * o Compatible string of "ethernet-phy-ieee802.3-c22"
118 	if (of_get_phy_id(child, &phy_id) != -EINVAL)  in of_mdiobus_child_is_phy()
121 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))  in of_mdiobus_child_is_phy()
124 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))  in of_mdiobus_child_is_phy()
142  * __of_mdiobus_register - Register mii_bus and create PHYs from the device tree
143  * @mdio: pointer to mii_bus structure
144  * @np: pointer to device_node of MDIO bus.
145  * @owner: module owning the @mdio object.
150 int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,  in __of_mdiobus_register()  argument
158 		return __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
162 		return -ENODEV;  in __of_mdiobus_register()
166 	mdio->phy_mask = ~0;  in __of_mdiobus_register()
168 	device_set_node(&mdio->dev, of_fwnode_handle(np));  in __of_mdiobus_register()
171 	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;  in __of_mdiobus_register()
172 	of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);  in __of_mdiobus_register()
173 	mdio->reset_post_delay_us = 0;  in __of_mdiobus_register()
174 	of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);  in __of_mdiobus_register()
176 	/* Register the MDIO bus */  in __of_mdiobus_register()
177 	rc = __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
183 		addr = of_mdio_parse_addr(&mdio->dev, child);  in __of_mdiobus_register()
184 		if (addr < 0) {  in __of_mdiobus_register()
190 			rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_register()
192 			rc = of_mdiobus_register_device(mdio, child, addr);  in __of_mdiobus_register()
194 		if (rc == -ENODEV)  in __of_mdiobus_register()
195 			dev_err(&mdio->dev,  in __of_mdiobus_register()
196 				"MDIO device at address %d is missing.\n",  in __of_mdiobus_register()
203 		return 0;  in __of_mdiobus_register()
211 		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {  in __of_mdiobus_register()
213 			if (mdiobus_is_registered_device(mdio, addr))  in __of_mdiobus_register()
217 			dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",  in __of_mdiobus_register()
221 				/* -ENODEV is the return code that PHYLIB has  in __of_mdiobus_register()
225 				rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_register()
228 				if (rc != -ENODEV)  in __of_mdiobus_register()
234 	return 0;  in __of_mdiobus_register()
238 	mdiobus_unregister(mdio);  in __of_mdiobus_register()
244  * of_mdio_find_device - Given a device tree node, find the mdio_device
258  * of_phy_find_device - Give a PHY node, find the phy_device
271  * of_phy_connect - Connect to the phy described in the device tree
293 	phy->dev_flags |= flags;  in of_phy_connect()
298 	put_device(&phy->mdio.dev);  in of_phy_connect()
306  * - Get phy node and connect to the phy described in the device tree
329 		if (ret < 0) {  in of_phy_get_and_connect()
330 			netdev_err(dev, "broken fixed-link specification\n");  in of_phy_get_and_connect()
335 		phy_np = of_parse_phandle(np, "phy-handle", 0);  in of_phy_get_and_connect()
340 	phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);  in of_phy_get_and_connect()
351  * - the old DT binding, where 'fixed-link' was a property with 5
353  * - the new DT binding, where 'fixed-link' is a sub-node of the
363 	dn = of_get_child_by_name(np, "fixed-link");  in of_phy_is_fixed_link()
370 	if (err == 0 && strcmp(managed, "auto") != 0)  in of_phy_is_fixed_link()
374 	if (of_get_property(np, "fixed-link", &len) &&  in of_phy_is_fixed_link()
389 	if (of_property_read_string(np, "managed", &managed) == 0 &&  in of_phy_register_fixed_link()
390 	    strcmp(managed, "in-band-status") == 0) {  in of_phy_register_fixed_link()
396 	fixed_link_node = of_get_child_by_name(np, "fixed-link");  in of_phy_register_fixed_link()
400 						      "full-duplex");  in of_phy_register_fixed_link()
404 			return -EINVAL;  in of_phy_register_fixed_link()
408 							  "asym-pause");  in of_phy_register_fixed_link()
415 	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,  in of_phy_register_fixed_link()
416 				       ARRAY_SIZE(fixed_link_prop)) == 0) {  in of_phy_register_fixed_link()
425 	return -ENODEV;  in of_phy_register_fixed_link()
442 	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */  in of_phy_deregister_fixed_link()