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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * OF helpers for the MDIO (Ethernet PHY) API
- *
- * Copyright (c) 2009 Secret Lab Technologies, Ltd.
- */
- #ifndef __LINUX_OF_MDIO_H
- #define __LINUX_OF_MDIO_H
- #include <linux/device.h>
- #include <linux/phy.h>
- #include <linux/of.h>
- #if IS_ENABLED(CONFIG_OF_MDIO)
- bool of_mdiobus_child_is_phy(struct device_node *child);
- int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,
- struct module *owner);
- static inline int of_mdiobus_register(struct mii_bus *mdio,
- struct device_node *np)
- {
- return __of_mdiobus_register(mdio, np, THIS_MODULE);
- }
- int __devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
- struct device_node *np, struct module *owner);
- static inline int devm_of_mdiobus_register(struct device *dev,
- struct mii_bus *mdio,
- struct device_node *np)
- {
- return __devm_of_mdiobus_register(dev, mdio, np, THIS_MODULE);
- }
- struct mdio_device *of_mdio_find_device(struct device_node *np);
- struct phy_device *of_phy_find_device(struct device_node *phy_np);
- struct phy_device *
- of_phy_connect(struct net_device *dev, struct device_node *phy_np,
- void (*hndlr)(struct net_device *), u32 flags,
- phy_interface_t iface);
- struct phy_device *
- of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
- void (*hndlr)(struct net_device *));
- struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
- int of_phy_register_fixed_link(struct device_node *np);
- void of_phy_deregister_fixed_link(struct device_node *np);
- bool of_phy_is_fixed_link(struct device_node *np);
- int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
- struct device_node *child, u32 addr);
- static inline int of_mdio_parse_addr(struct device *dev,
- const struct device_node *np)
- {
- u32 addr;
- int ret;
- ret = of_property_read_u32(np, "reg", &addr);
- if (ret < 0) {
- dev_err(dev, "%s has invalid PHY address\n", np->full_name);
- return ret;
- }
- /* A PHY must have a reg property in the range [0-31] */
- if (addr >= PHY_MAX_ADDR) {
- dev_err(dev, "%s PHY address %i is too large\n",
- np->full_name, addr);
- return -EINVAL;
- }
- return addr;
- }
- #else /* CONFIG_OF_MDIO */
- static inline bool of_mdiobus_child_is_phy(struct device_node *child)
- {
- return false;
- }
- static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
- {
- /*
- * Fall back to the non-DT function to register a bus.
- * This way, we don't have to keep compat bits around in drivers.
- */
- return mdiobus_register(mdio);
- }
- static inline int devm_of_mdiobus_register(struct device *dev,
- struct mii_bus *mdio,
- struct device_node *np)
- {
- return devm_mdiobus_register(dev, mdio);
- }
- static inline struct mdio_device *of_mdio_find_device(struct device_node *np)
- {
- return NULL;
- }
- static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
- {
- return NULL;
- }
- static inline struct phy_device *of_phy_connect(struct net_device *dev,
- struct device_node *phy_np,
- void (*hndlr)(struct net_device *),
- u32 flags, phy_interface_t iface)
- {
- return NULL;
- }
- static inline struct phy_device *
- of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
- void (*hndlr)(struct net_device *))
- {
- return NULL;
- }
- static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
- {
- return NULL;
- }
- static inline int of_mdio_parse_addr(struct device *dev,
- const struct device_node *np)
- {
- return -ENOSYS;
- }
- static inline int of_phy_register_fixed_link(struct device_node *np)
- {
- return -ENOSYS;
- }
- static inline void of_phy_deregister_fixed_link(struct device_node *np)
- {
- }
- static inline bool of_phy_is_fixed_link(struct device_node *np)
- {
- return false;
- }
- static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,
- struct phy_device *phy,
- struct device_node *child, u32 addr)
- {
- return -ENOSYS;
- }
- #endif
- #endif /* __LINUX_OF_MDIO_H */
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