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 int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
16 extern struct phy_device *of_phy_find_device(struct device_node *phy_np);
17 extern struct phy_device *of_phy_connect(struct net_device *dev,
18 struct device_node *phy_np,
19 void (*hndlr)(struct net_device *),
20 u32 flags, phy_interface_t iface);
21 extern struct phy_device *
22 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
23 void (*hndlr)(struct net_device *));
24 struct phy_device *of_phy_attach(struct net_device *dev,
25 struct device_node *phy_np, u32 flags,
26 phy_interface_t iface);
28 extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
29 extern int of_phy_register_fixed_link(struct device_node *np);
30 extern void of_phy_deregister_fixed_link(struct device_node *np);
31 extern bool of_phy_is_fixed_link(struct device_node *np);
34 static inline int of_mdio_parse_addr(struct device *dev,
35 const struct device_node *np)
40 ret = of_property_read_u32(np, "reg", &addr);
42 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
46 /* A PHY must have a reg property in the range [0-31] */
47 if (addr >= PHY_MAX_ADDR) {
48 dev_err(dev, "%s PHY address %i is too large\n",
56 #else /* CONFIG_OF_MDIO */
57 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
60 * Fall back to the non-DT function to register a bus.
61 * This way, we don't have to keep compat bits around in drivers.
64 return mdiobus_register(mdio);
67 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
72 static inline struct phy_device *of_phy_connect(struct net_device *dev,
73 struct device_node *phy_np,
74 void (*hndlr)(struct net_device *),
75 u32 flags, phy_interface_t iface)
80 static inline struct phy_device *
81 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
82 void (*hndlr)(struct net_device *))
87 static inline struct phy_device *of_phy_attach(struct net_device *dev,
88 struct device_node *phy_np,
89 u32 flags, phy_interface_t iface)
94 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
99 static inline int of_mdio_parse_addr(struct device *dev,
100 const struct device_node *np)
104 static inline int of_phy_register_fixed_link(struct device_node *np)
108 static inline void of_phy_deregister_fixed_link(struct device_node *np)
111 static inline bool of_phy_is_fixed_link(struct device_node *np)
118 #endif /* __LINUX_OF_MDIO_H */