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 of_phy_attach(struct net_device *dev, struct device_node *phy_np,
31 u32 flags, phy_interface_t iface);
33 struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
34 int of_phy_register_fixed_link(struct device_node *np);
35 void of_phy_deregister_fixed_link(struct device_node *np);
36 bool of_phy_is_fixed_link(struct device_node *np);
37 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
38 struct device_node *child, u32 addr);
40 static inline int of_mdio_parse_addr(struct device *dev,
41 const struct device_node *np)
46 ret = of_property_read_u32(np, "reg", &addr);
48 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
52 /* A PHY must have a reg property in the range [0-31] */
53 if (addr >= PHY_MAX_ADDR) {
54 dev_err(dev, "%s PHY address %i is too large\n",
62 #else /* CONFIG_OF_MDIO */
63 static inline bool of_mdiobus_child_is_phy(struct device_node *child)
68 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
71 * Fall back to the non-DT function to register a bus.
72 * This way, we don't have to keep compat bits around in drivers.
75 return mdiobus_register(mdio);
78 static inline struct mdio_device *of_mdio_find_device(struct device_node *np)
83 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
88 static inline struct phy_device *of_phy_connect(struct net_device *dev,
89 struct device_node *phy_np,
90 void (*hndlr)(struct net_device *),
91 u32 flags, phy_interface_t iface)
96 static inline struct phy_device *
97 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
98 void (*hndlr)(struct net_device *))
103 static inline struct phy_device *of_phy_attach(struct net_device *dev,
104 struct device_node *phy_np,
105 u32 flags, phy_interface_t iface)
110 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
115 static inline int of_mdio_parse_addr(struct device *dev,
116 const struct device_node *np)
120 static inline int of_phy_register_fixed_link(struct device_node *np)
124 static inline void of_phy_deregister_fixed_link(struct device_node *np)
127 static inline bool of_phy_is_fixed_link(struct device_node *np)
132 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
133 struct phy_device *phy,
134 struct device_node *child, u32 addr)
141 #endif /* __LINUX_OF_MDIO_H */