1 // SPDX-License-Identifier: GPL-2.0-only
30  * ethernet-phy-idAAAA.BBBB */
37 				   struct device_node *child, u32 addr)  in of_mdiobus_phy_device_register()  argument
40 						  of_fwnode_handle(child),  in of_mdiobus_phy_device_register()
46 				    struct device_node *child, u32 addr)  in of_mdiobus_register_phy()  argument
48 	return fwnode_mdiobus_register_phy(mdio, of_fwnode_handle(child), addr);  in of_mdiobus_register_phy()
52 				      struct device_node *child, u32 addr)  in of_mdiobus_register_device()  argument
54 	struct fwnode_handle *fwnode = of_fwnode_handle(child);  in of_mdiobus_register_device()
62 	/* Associate the OF node with the device structure so it  in of_mdiobus_register_device()
66 	device_set_node(&mdiodev->dev, fwnode);  in of_mdiobus_register_device()
72 		of_node_put(child);  in of_mdiobus_register_device()
76 	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",  in of_mdiobus_register_device()
77 		child, addr);  in of_mdiobus_register_device()
81 /* The following is a list of PHY compatible strings which appear in
82  * some DTBs. The compatible string is never matched against a PHY
84  * to have a compatible string, so they can be matched to an MDIO
88 	{ .compatible = "brcm,40nm-ephy" },
98 	{ .compatible = "moxa,moxart-rtl8201cp", },
103  * Return true if the child node is for a phy. It must either:
104  * o Compatible string of "ethernet-phy-idX.X"
105  * o Compatible string of "ethernet-phy-ieee802.3-c45"
106  * o Compatible string of "ethernet-phy-ieee802.3-c22"
107  * o In the white list above (and issue a warning)
110  * A device which is not a phy is expected to have a compatible string
113 bool of_mdiobus_child_is_phy(struct device_node *child)  in of_mdiobus_child_is_phy()  argument
117 	if (of_get_phy_id(child, &phy_id) != -EINVAL)  in of_mdiobus_child_is_phy()
120 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))  in of_mdiobus_child_is_phy()
123 	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))  in of_mdiobus_child_is_phy()
126 	if (of_match_node(whitelist_phys, child)) {  in of_mdiobus_child_is_phy()
129 			child);  in of_mdiobus_child_is_phy()
133 	if (!of_find_property(child, "compatible", NULL))  in of_mdiobus_child_is_phy()
141  * of_mdiobus_register - Register mii_bus and create PHYs from the device tree
145  * This function registers the mii_bus structure and registers a phy_device
146  * for each child node of @np.
150 	struct device_node *child;  in of_mdiobus_register()  local
157 	/* Do not continue if the node is disabled */  in of_mdiobus_register()
159 		return -ENODEV;  in of_mdiobus_register()
163 	mdio->phy_mask = ~0;  in of_mdiobus_register()
165 	device_set_node(&mdio->dev, of_fwnode_handle(np));  in of_mdiobus_register()
168 	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;  in of_mdiobus_register()
169 	of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);  in of_mdiobus_register()
170 	mdio->reset_post_delay_us = 0;  in of_mdiobus_register()
171 	of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);  in of_mdiobus_register()
178 	/* Loop over the child nodes and register a phy_device for each phy */  in of_mdiobus_register()
179 	for_each_available_child_of_node(np, child) {  in of_mdiobus_register()
180 		addr = of_mdio_parse_addr(&mdio->dev, child);  in of_mdiobus_register()
186 		if (of_mdiobus_child_is_phy(child))  in of_mdiobus_register()
187 			rc = of_mdiobus_register_phy(mdio, child, addr);  in of_mdiobus_register()
189 			rc = of_mdiobus_register_device(mdio, child, addr);  in of_mdiobus_register()
191 		if (rc == -ENODEV)  in of_mdiobus_register()
192 			dev_err(&mdio->dev,  in of_mdiobus_register()
202 	/* auto scan for PHYs with empty reg property */  in of_mdiobus_register()
203 	for_each_available_child_of_node(np, child) {  in of_mdiobus_register()
204 		/* Skip PHYs with reg property set */  in of_mdiobus_register()
205 		if (of_find_property(child, "reg", NULL))  in of_mdiobus_register()
213 			/* be noisy to encourage people to set reg property */  in of_mdiobus_register()
214 			dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",  in of_mdiobus_register()
215 				 child, addr);  in of_mdiobus_register()
217 			if (of_mdiobus_child_is_phy(child)) {  in of_mdiobus_register()
218 				/* -ENODEV is the return code that PHYLIB has  in of_mdiobus_register()
222 				rc = of_mdiobus_register_phy(mdio, child, addr);  in of_mdiobus_register()
225 				if (rc != -ENODEV)  in of_mdiobus_register()
240  * of_mdio_find_device - Given a device tree node, find the mdio_device
241  * @np: pointer to the mdio_device's device tree node
243  * If successful, returns a pointer to the mdio_device with the embedded
254  * of_phy_find_device - Give a PHY node, find the phy_device
255  * @phy_np: Pointer to the phy's device tree node
257  * If successful, returns a pointer to the phy_device with the embedded
267  * of_phy_connect - Connect to the phy described in the device tree
269  * @phy_np: Pointer to device tree node for the PHY
274  * If successful, returns a pointer to the phy_device with the embedded
289 	phy->dev_flags |= flags;  in of_phy_connect()
294 	put_device(&phy->mdio.dev);  in of_phy_connect()
302  * - Get phy node and connect to the phy described in the device tree
304  * @np: Pointer to device tree node for the net_device claiming the phy
307  * If successful, returns a pointer to the phy_device with the embedded
326 			netdev_err(dev, "broken fixed-link specification\n");  in of_phy_get_and_connect()
331 		phy_np = of_parse_phandle(np, "phy-handle", 0);  in of_phy_get_and_connect()
347  * - the old DT binding, where 'fixed-link' was a property with 5
349  * - the new DT binding, where 'fixed-link' is a sub-node of the
359 	dn = of_get_child_by_name(np, "fixed-link");  in of_phy_is_fixed_link()
370 	if (of_get_property(np, "fixed-link", &len) &&  in of_phy_is_fixed_link()
386 	    strcmp(managed, "in-band-status") == 0) {  in of_phy_register_fixed_link()
392 	fixed_link_node = of_get_child_by_name(np, "fixed-link");  in of_phy_register_fixed_link()
396 						      "full-duplex");  in of_phy_register_fixed_link()
400 			return -EINVAL;  in of_phy_register_fixed_link()
404 							  "asym-pause");  in of_phy_register_fixed_link()
411 	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,  in of_phy_register_fixed_link()
421 	return -ENODEV;  in of_phy_register_fixed_link()
438 	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */  in of_phy_deregister_fixed_link()