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 int devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
19 struct device_node *np);
20 struct mdio_device *of_mdio_find_device(struct device_node *np);
21 struct phy_device *of_phy_find_device(struct device_node *phy_np);
23 of_phy_connect(struct net_device *dev, struct device_node *phy_np,
24 void (*hndlr)(struct net_device *), u32 flags,
25 phy_interface_t iface);
27 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
28 void (*hndlr)(struct net_device *));
30 struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
31 int of_phy_register_fixed_link(struct device_node *np);
32 void of_phy_deregister_fixed_link(struct device_node *np);
33 bool of_phy_is_fixed_link(struct device_node *np);
34 int of_mdiobus_phy_device_register(struct mii_bus *mdio, 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 int devm_of_mdiobus_register(struct device *dev,
77 struct device_node *np)
79 return devm_mdiobus_register(dev, mdio);
82 static inline struct mdio_device *of_mdio_find_device(struct device_node *np)
87 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
92 static inline struct phy_device *of_phy_connect(struct net_device *dev,
93 struct device_node *phy_np,
94 void (*hndlr)(struct net_device *),
95 u32 flags, phy_interface_t iface)
100 static inline struct phy_device *
101 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
102 void (*hndlr)(struct net_device *))
107 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
112 static inline int of_mdio_parse_addr(struct device *dev,
113 const struct device_node *np)
117 static inline int of_phy_register_fixed_link(struct device_node *np)
121 static inline void of_phy_deregister_fixed_link(struct device_node *np)
124 static inline bool of_phy_is_fixed_link(struct device_node *np)
129 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
130 struct phy_device *phy,
131 struct device_node *child, u32 addr)
138 #endif /* __LINUX_OF_MDIO_H */