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 phy_device *of_phy_find_device(struct device_node *phy_np);
22 of_phy_connect(struct net_device *dev, struct device_node *phy_np,
23 void (*hndlr)(struct net_device *), u32 flags,
24 phy_interface_t iface);
26 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
27 void (*hndlr)(struct net_device *));
29 of_phy_attach(struct net_device *dev, struct device_node *phy_np,
30 u32 flags, phy_interface_t iface);
32 struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
33 int of_phy_register_fixed_link(struct device_node *np);
34 void of_phy_deregister_fixed_link(struct device_node *np);
35 bool of_phy_is_fixed_link(struct device_node *np);
36 int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
37 struct device_node *child, u32 addr);
39 static inline int of_mdio_parse_addr(struct device *dev,
40 const struct device_node *np)
45 ret = of_property_read_u32(np, "reg", &addr);
47 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
51 /* A PHY must have a reg property in the range [0-31] */
52 if (addr >= PHY_MAX_ADDR) {
53 dev_err(dev, "%s PHY address %i is too large\n",
61 #else /* CONFIG_OF_MDIO */
62 static inline bool of_mdiobus_child_is_phy(struct device_node *child)
67 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
70 * Fall back to the non-DT function to register a bus.
71 * This way, we don't have to keep compat bits around in drivers.
74 return mdiobus_register(mdio);
77 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
82 static inline struct phy_device *of_phy_connect(struct net_device *dev,
83 struct device_node *phy_np,
84 void (*hndlr)(struct net_device *),
85 u32 flags, phy_interface_t iface)
90 static inline struct phy_device *
91 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
92 void (*hndlr)(struct net_device *))
97 static inline struct phy_device *of_phy_attach(struct net_device *dev,
98 struct device_node *phy_np,
99 u32 flags, phy_interface_t iface)
104 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
109 static inline int of_mdio_parse_addr(struct device *dev,
110 const struct device_node *np)
114 static inline int of_phy_register_fixed_link(struct device_node *np)
118 static inline void of_phy_deregister_fixed_link(struct device_node *np)
121 static inline bool of_phy_is_fixed_link(struct device_node *np)
126 static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
127 struct phy_device *phy,
128 struct device_node *child, u32 addr)
135 #endif /* __LINUX_OF_MDIO_H */