1 // SPDX-License-Identifier: GPL-2.0-only
3  * OF helpers for the MDIO (Ethernet PHY) API
29  * ethernet-phy-idAAAA.BBBB */
37 		if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) {  in of_get_phy_id()
38 			*phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);  in of_get_phy_id()
39 			return 0;  in of_get_phy_id()
42 	return -EINVAL;  in of_get_phy_id()
50 	err = of_parse_phandle_with_fixed_args(node, "timestamper", 1, 0, &arg);  in of_find_mii_timestamper()
52 	if (err == -ENOENT)  in of_find_mii_timestamper()
58 		return ERR_PTR(-EINVAL);  in of_find_mii_timestamper()
60 	return register_mii_timestamper(arg.np, arg.args[0]);  in of_find_mii_timestamper()
63 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,  in of_mdiobus_phy_device_register()  argument
68 	rc = of_irq_get(child, 0);  in of_mdiobus_phy_device_register()
69 	if (rc == -EPROBE_DEFER)  in of_mdiobus_phy_device_register()
72 	if (rc > 0) {  in of_mdiobus_phy_device_register()
73 		phy->irq = rc;  in of_mdiobus_phy_device_register()
74 		mdio->irq[addr] = rc;  in of_mdiobus_phy_device_register()
76 		phy->irq = mdio->irq[addr];  in of_mdiobus_phy_device_register()
79 	if (of_property_read_bool(child, "broken-turn-around"))  in of_mdiobus_phy_device_register()
80 		mdio->phy_ignore_ta_mask |= 1 << addr;  in of_mdiobus_phy_device_register()
82 	of_property_read_u32(child, "reset-assert-us",  in of_mdiobus_phy_device_register()
83 			     &phy->mdio.reset_assert_delay);  in of_mdiobus_phy_device_register()
84 	of_property_read_u32(child, "reset-deassert-us",  in of_mdiobus_phy_device_register()
85 			     &phy->mdio.reset_deassert_delay);  in of_mdiobus_phy_device_register()
90 	phy->mdio.dev.of_node = child;  in of_mdiobus_phy_device_register()
91 	phy->mdio.dev.fwnode = of_fwnode_handle(child);  in of_mdiobus_phy_device_register()
101 	dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",  in of_mdiobus_phy_device_register()
103 	return 0;  in of_mdiobus_phy_device_register()
107 static int of_mdiobus_register_phy(struct mii_bus *mdio,  in of_mdiobus_register_phy()  argument
121 					 "ethernet-phy-ieee802.3-c45");  in of_mdiobus_register_phy()
124 		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);  in of_mdiobus_register_phy()
126 		phy = get_phy_device(mdio, addr, is_c45);  in of_mdiobus_register_phy()
133 	rc = of_mdiobus_phy_device_register(mdio, phy, child, addr);  in of_mdiobus_register_phy()
141 	/* phy->mii_ts may already be defined by the PHY driver. A  in of_mdiobus_register_phy()
146 		phy->mii_ts = mii_ts;  in of_mdiobus_register_phy()
148 	return 0;  in of_mdiobus_register_phy()
151 static int of_mdiobus_register_device(struct mii_bus *mdio,  in of_mdiobus_register_device()  argument
158 	mdiodev = mdio_device_create(mdio, addr);  in of_mdiobus_register_device()
166 	device_set_node(&mdiodev->dev, fwnode);  in of_mdiobus_register_device()
171 		device_set_node(&mdiodev->dev, NULL);  in of_mdiobus_register_device()
177 	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",  in of_mdiobus_register_device()
179 	return 0;  in of_mdiobus_register_device()
185  * to have a compatible string, so they can be matched to an MDIO
189 	{ .compatible = "brcm,40nm-ephy" },
199 	{ .compatible = "moxa,moxart-rtl8201cp", },
205  * o Compatible string of "ethernet-phy-idX.X"
206  * o Compatible string of "ethernet-phy-ieee802.3-c45"
207  * o Compatible string of "ethernet-phy-ieee802.3-c22"
218 	if (of_get_phy_id(child, &phy_id) != -EINVAL)  in of_mdiobus_child_is_phy()
221 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))  in of_mdiobus_child_is_phy()
224 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))  in of_mdiobus_child_is_phy()
242  * __of_mdiobus_register - Register mii_bus and create PHYs from the device tree
243  * @mdio: pointer to mii_bus structure
244  * @np: pointer to device_node of MDIO bus.
245  * @owner: module owning the @mdio object.
250 int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,  in __of_mdiobus_register()  argument
258 		return __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
262 		return -ENODEV;  in __of_mdiobus_register()
266 	mdio->phy_mask = ~0;  in __of_mdiobus_register()
268 	device_set_node(&mdio->dev, of_fwnode_handle(np));  in __of_mdiobus_register()
271 	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;  in __of_mdiobus_register()
272 	of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);  in __of_mdiobus_register()
273 	mdio->reset_post_delay_us = 0;  in __of_mdiobus_register()
274 	of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);  in __of_mdiobus_register()
276 	/* Register the MDIO bus */  in __of_mdiobus_register()
277 	rc = __mdiobus_register(mdio, owner);  in __of_mdiobus_register()
283 		addr = of_mdio_parse_addr(&mdio->dev, child);  in __of_mdiobus_register()
284 		if (addr < 0) {  in __of_mdiobus_register()
290 			rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_register()
292 			rc = of_mdiobus_register_device(mdio, child, addr);  in __of_mdiobus_register()
294 		if (rc == -ENODEV)  in __of_mdiobus_register()
295 			dev_err(&mdio->dev,  in __of_mdiobus_register()
296 				"MDIO device at address %d is missing.\n",  in __of_mdiobus_register()
303 		return 0;  in __of_mdiobus_register()
311 		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {  in __of_mdiobus_register()
313 			if (mdiobus_is_registered_device(mdio, addr))  in __of_mdiobus_register()
317 			dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",  in __of_mdiobus_register()
321 				/* -ENODEV is the return code that PHYLIB has  in __of_mdiobus_register()
325 				rc = of_mdiobus_register_phy(mdio, child, addr);  in __of_mdiobus_register()
328 				if (rc != -ENODEV)  in __of_mdiobus_register()
334 	return 0;  in __of_mdiobus_register()
338 	mdiobus_unregister(mdio);  in __of_mdiobus_register()
344  * of_mdio_find_device - Given a device tree node, find the mdio_device
367  * of_phy_find_device - Give a PHY node, find the phy_device
381 	if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)  in of_phy_find_device()
382 		return to_phy_device(&mdiodev->dev);  in of_phy_find_device()
384 	put_device(&mdiodev->dev);  in of_phy_find_device()
391  * of_phy_connect - Connect to the phy described in the device tree
413 	phy->dev_flags |= flags;  in of_phy_connect()
418 	put_device(&phy->mdio.dev);  in of_phy_connect()
426  * - Get phy node and connect to the phy described in the device tree
449 		if (ret < 0) {  in of_phy_get_and_connect()
450 			netdev_err(dev, "broken fixed-link specification\n");  in of_phy_get_and_connect()
455 		phy_np = of_parse_phandle(np, "phy-handle", 0);  in of_phy_get_and_connect()
460 	phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);  in of_phy_get_and_connect()
469  * of_phy_attach - Attach to a PHY without starting the state machine
492 	put_device(&phy->mdio.dev);  in of_phy_attach()
501  * - the old DT binding, where 'fixed-link' was a property with 5
503  * - the new DT binding, where 'fixed-link' is a sub-node of the
513 	dn = of_get_child_by_name(np, "fixed-link");  in of_phy_is_fixed_link()
520 	if (err == 0 && strcmp(managed, "auto") != 0)  in of_phy_is_fixed_link()
524 	if (of_get_property(np, "fixed-link", &len) &&  in of_phy_is_fixed_link()
539 	if (of_property_read_string(np, "managed", &managed) == 0 &&  in of_phy_register_fixed_link()
540 	    strcmp(managed, "in-band-status") == 0) {  in of_phy_register_fixed_link()
546 	fixed_link_node = of_get_child_by_name(np, "fixed-link");  in of_phy_register_fixed_link()
550 						      "full-duplex");  in of_phy_register_fixed_link()
554 			return -EINVAL;  in of_phy_register_fixed_link()
558 							  "asym-pause");  in of_phy_register_fixed_link()
565 	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,  in of_phy_register_fixed_link()
566 				       ARRAY_SIZE(fixed_link_prop)) == 0) {  in of_phy_register_fixed_link()
575 	return -ENODEV;  in of_phy_register_fixed_link()
592 	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */  in of_phy_deregister_fixed_link()