1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * OF helpers for the MDIO (Ethernet PHY) API
5 * Copyright (c) 2009 Secret Lab Technologies, Ltd.
8 #ifndef __LINUX_OF_MDIO_H
9 #define __LINUX_OF_MDIO_H
11 #include <linux/device.h>
12 #include <linux/phy.h>
15 #if IS_ENABLED(CONFIG_OF_MDIO)
16 bool of_mdiobus_child_is_phy(struct device_node *child);
17 int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,
18 struct module *owner);
20 static inline int of_mdiobus_register(struct mii_bus *mdio,
21 struct device_node *np)
23 return __of_mdiobus_register(mdio, np, THIS_MODULE);
26 int __devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
27 struct device_node *np, struct module *owner);
29 static inline int devm_of_mdiobus_register(struct device *dev,
31 struct device_node *np)
33 return __devm_of_mdiobus_register(dev, mdio, np, THIS_MODULE);
36 struct mdio_device *of_mdio_find_device(struct device_node *np);
37 struct phy_device *of_phy_find_device(struct device_node *phy_np);
39 of_phy_connect(struct net_device *dev, struct device_node *phy_np,
40 void (*hndlr)(struct net_device *), u32 flags,
41 phy_interface_t iface);
43 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
44 void (*hndlr)(struct net_device *));
46 struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
47 int of_phy_register_fixed_link(struct device_node *np);
48 void of_phy_deregister_fixed_link(struct device_node *np);
49 bool of_phy_is_fixed_link(struct device_node *np);
50 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
51 struct device_node *child, u32 addr);
53 static inline int of_mdio_parse_addr(struct device *dev,
54 const struct device_node *np)
59 ret = of_property_read_u32(np, "reg", &addr);
61 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
65 /* A PHY must have a reg property in the range [0-31] */
66 if (addr >= PHY_MAX_ADDR) {
67 dev_err(dev, "%s PHY address %i is too large\n",
75 #else /* CONFIG_OF_MDIO */
76 static inline bool of_mdiobus_child_is_phy(struct device_node *child)
81 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
84 * Fall back to the non-DT function to register a bus.
85 * This way, we don't have to keep compat bits around in drivers.
88 return mdiobus_register(mdio);
91 static inline int devm_of_mdiobus_register(struct device *dev,
93 struct device_node *np)
95 return devm_mdiobus_register(dev, mdio);
98 static inline struct mdio_device *of_mdio_find_device(struct device_node *np)
103 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
108 static inline struct phy_device *of_phy_connect(struct net_device *dev,
109 struct device_node *phy_np,
110 void (*hndlr)(struct net_device *),
111 u32 flags, phy_interface_t iface)
116 static inline struct phy_device *
117 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
118 void (*hndlr)(struct net_device *))
123 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
128 static inline int of_mdio_parse_addr(struct device *dev,
129 const struct device_node *np)
133 static inline int of_phy_register_fixed_link(struct device_node *np)
137 static inline void of_phy_deregister_fixed_link(struct device_node *np)
140 static inline bool of_phy_is_fixed_link(struct device_node *np)
145 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
146 struct phy_device *phy,
147 struct device_node *child, u32 addr)
154 #endif /* __LINUX_OF_MDIO_H */