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/phy.h>
14 #if IS_ENABLED(CONFIG_OF_MDIO)
15 extern bool of_mdiobus_child_is_phy(struct device_node *child);
16 extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
17 extern struct phy_device *of_phy_find_device(struct device_node *phy_np);
18 extern struct phy_device *of_phy_connect(struct net_device *dev,
19 struct device_node *phy_np,
20 void (*hndlr)(struct net_device *),
21 u32 flags, phy_interface_t iface);
22 extern struct phy_device *
23 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
24 void (*hndlr)(struct net_device *));
25 struct phy_device *of_phy_attach(struct net_device *dev,
26 struct device_node *phy_np, u32 flags,
27 phy_interface_t iface);
29 extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
30 extern int of_phy_register_fixed_link(struct device_node *np);
31 extern void of_phy_deregister_fixed_link(struct device_node *np);
32 extern bool of_phy_is_fixed_link(struct device_node *np);
35 static inline int of_mdio_parse_addr(struct device *dev,
36 const struct device_node *np)
41 ret = of_property_read_u32(np, "reg", &addr);
43 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
47 /* A PHY must have a reg property in the range [0-31] */
48 if (addr >= PHY_MAX_ADDR) {
49 dev_err(dev, "%s PHY address %i is too large\n",
57 #else /* CONFIG_OF_MDIO */
58 static bool of_mdiobus_child_is_phy(struct device_node *child)
63 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
66 * Fall back to the non-DT function to register a bus.
67 * This way, we don't have to keep compat bits around in drivers.
70 return mdiobus_register(mdio);
73 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
78 static inline struct phy_device *of_phy_connect(struct net_device *dev,
79 struct device_node *phy_np,
80 void (*hndlr)(struct net_device *),
81 u32 flags, phy_interface_t iface)
86 static inline struct phy_device *
87 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
88 void (*hndlr)(struct net_device *))
93 static inline struct phy_device *of_phy_attach(struct net_device *dev,
94 struct device_node *phy_np,
95 u32 flags, phy_interface_t iface)
100 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
105 static inline int of_mdio_parse_addr(struct device *dev,
106 const struct device_node *np)
110 static inline int of_phy_register_fixed_link(struct device_node *np)
114 static inline void of_phy_deregister_fixed_link(struct device_node *np)
117 static inline bool of_phy_is_fixed_link(struct device_node *np)
124 #endif /* __LINUX_OF_MDIO_H */