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 of_phy_attach(struct net_device *dev, struct device_node *phy_np,
47 u32 flags, phy_interface_t iface);
49 struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
50 int of_phy_register_fixed_link(struct device_node *np);
51 void of_phy_deregister_fixed_link(struct device_node *np);
52 bool of_phy_is_fixed_link(struct device_node *np);
53 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
54 struct device_node *child, u32 addr);
56 static inline int of_mdio_parse_addr(struct device *dev,
57 const struct device_node *np)
62 ret = of_property_read_u32(np, "reg", &addr);
64 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
68 /* A PHY must have a reg property in the range [0-31] */
69 if (addr >= PHY_MAX_ADDR) {
70 dev_err(dev, "%s PHY address %i is too large\n",
78 #else /* CONFIG_OF_MDIO */
79 static inline bool of_mdiobus_child_is_phy(struct device_node *child)
84 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
87 * Fall back to the non-DT function to register a bus.
88 * This way, we don't have to keep compat bits around in drivers.
91 return mdiobus_register(mdio);
94 static inline int devm_of_mdiobus_register(struct device *dev,
96 struct device_node *np)
98 return devm_mdiobus_register(dev, mdio);
101 static inline struct mdio_device *of_mdio_find_device(struct device_node *np)
106 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
111 static inline struct phy_device *of_phy_connect(struct net_device *dev,
112 struct device_node *phy_np,
113 void (*hndlr)(struct net_device *),
114 u32 flags, phy_interface_t iface)
119 static inline struct phy_device *
120 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
121 void (*hndlr)(struct net_device *))
126 static inline struct phy_device *of_phy_attach(struct net_device *dev,
127 struct device_node *phy_np,
128 u32 flags, phy_interface_t iface)
133 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
138 static inline int of_mdio_parse_addr(struct device *dev,
139 const struct device_node *np)
143 static inline int of_phy_register_fixed_link(struct device_node *np)
147 static inline void of_phy_deregister_fixed_link(struct device_node *np)
150 static inline bool of_phy_is_fixed_link(struct device_node *np)
155 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
156 struct phy_device *phy,
157 struct device_node *child, u32 addr)
164 #endif /* __LINUX_OF_MDIO_H */