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);
33 extern int of_mdiobus_phy_device_register(struct mii_bus *mdio,
34 struct phy_device *phy,
35 struct device_node *child, u32 addr);
37 static inline int of_mdio_parse_addr(struct device *dev,
38 const struct device_node *np)
43 ret = of_property_read_u32(np, "reg", &addr);
45 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
49 /* A PHY must have a reg property in the range [0-31] */
50 if (addr >= PHY_MAX_ADDR) {
51 dev_err(dev, "%s PHY address %i is too large\n",
59 #else /* CONFIG_OF_MDIO */
60 static inline bool of_mdiobus_child_is_phy(struct device_node *child)
65 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
68 * Fall back to the non-DT function to register a bus.
69 * This way, we don't have to keep compat bits around in drivers.
72 return mdiobus_register(mdio);
75 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
80 static inline struct phy_device *of_phy_connect(struct net_device *dev,
81 struct device_node *phy_np,
82 void (*hndlr)(struct net_device *),
83 u32 flags, phy_interface_t iface)
88 static inline struct phy_device *
89 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
90 void (*hndlr)(struct net_device *))
95 static inline struct phy_device *of_phy_attach(struct net_device *dev,
96 struct device_node *phy_np,
97 u32 flags, phy_interface_t iface)
102 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
107 static inline int of_mdio_parse_addr(struct device *dev,
108 const struct device_node *np)
112 static inline int of_phy_register_fixed_link(struct device_node *np)
116 static inline void of_phy_deregister_fixed_link(struct device_node *np)
119 static inline bool of_phy_is_fixed_link(struct device_node *np)
124 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
125 struct phy_device *phy,
126 struct device_node *child, u32 addr)
133 #endif /* __LINUX_OF_MDIO_H */