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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * OF helpers for the MDIO (Ethernet PHY) API4 *5 * Copyright (c) 2009 Secret Lab Technologies, Ltd.6 */7 8#ifndef __LINUX_OF_MDIO_H9#define __LINUX_OF_MDIO_H10 11#include <linux/device.h>12#include <linux/phy.h>13#include <linux/of.h>14 15#if IS_ENABLED(CONFIG_OF_MDIO)16bool of_mdiobus_child_is_phy(struct device_node *child);17int __of_mdiobus_register(struct mii_bus *mdio, struct device_node *np,18 struct module *owner);19 20static inline int of_mdiobus_register(struct mii_bus *mdio,21 struct device_node *np)22{23 return __of_mdiobus_register(mdio, np, THIS_MODULE);24}25 26int __devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,27 struct device_node *np, struct module *owner);28 29static inline int devm_of_mdiobus_register(struct device *dev,30 struct mii_bus *mdio,31 struct device_node *np)32{33 return __devm_of_mdiobus_register(dev, mdio, np, THIS_MODULE);34}35 36struct mdio_device *of_mdio_find_device(struct device_node *np);37struct phy_device *of_phy_find_device(struct device_node *phy_np);38struct phy_device *39of_phy_connect(struct net_device *dev, struct device_node *phy_np,40 void (*hndlr)(struct net_device *), u32 flags,41 phy_interface_t iface);42struct phy_device *43of_phy_get_and_connect(struct net_device *dev, struct device_node *np,44 void (*hndlr)(struct net_device *));45 46struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);47int of_phy_register_fixed_link(struct device_node *np);48void of_phy_deregister_fixed_link(struct device_node *np);49bool of_phy_is_fixed_link(struct device_node *np);50int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,51 struct device_node *child, u32 addr);52 53static inline int of_mdio_parse_addr(struct device *dev,54 const struct device_node *np)55{56 u32 addr;57 int ret;58 59 ret = of_property_read_u32(np, "reg", &addr);60 if (ret < 0) {61 dev_err(dev, "%s has invalid PHY address\n", np->full_name);62 return ret;63 }64 65 /* A PHY must have a reg property in the range [0-31] */66 if (addr >= PHY_MAX_ADDR) {67 dev_err(dev, "%s PHY address %i is too large\n",68 np->full_name, addr);69 return -EINVAL;70 }71 72 return addr;73}74 75#else /* CONFIG_OF_MDIO */76static inline bool of_mdiobus_child_is_phy(struct device_node *child)77{78 return false;79}80 81static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)82{83 /*84 * Fall back to the non-DT function to register a bus.85 * This way, we don't have to keep compat bits around in drivers.86 */87 88 return mdiobus_register(mdio);89}90 91static inline int devm_of_mdiobus_register(struct device *dev,92 struct mii_bus *mdio,93 struct device_node *np)94{95 return devm_mdiobus_register(dev, mdio);96}97 98static inline struct mdio_device *of_mdio_find_device(struct device_node *np)99{100 return NULL;101}102 103static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)104{105 return NULL;106}107 108static inline struct phy_device *of_phy_connect(struct net_device *dev,109 struct device_node *phy_np,110 void (*hndlr)(struct net_device *),111 u32 flags, phy_interface_t iface)112{113 return NULL;114}115 116static inline struct phy_device *117of_phy_get_and_connect(struct net_device *dev, struct device_node *np,118 void (*hndlr)(struct net_device *))119{120 return NULL;121}122 123static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)124{125 return NULL;126}127 128static inline int of_mdio_parse_addr(struct device *dev,129 const struct device_node *np)130{131 return -ENOSYS;132}133static inline int of_phy_register_fixed_link(struct device_node *np)134{135 return -ENOSYS;136}137static inline void of_phy_deregister_fixed_link(struct device_node *np)138{139}140static inline bool of_phy_is_fixed_link(struct device_node *np)141{142 return false;143}144 145static inline int of_mdiobus_phy_device_register(struct mii_bus *mdio,146 struct phy_device *phy,147 struct device_node *child, u32 addr)148{149 return -ENOSYS;150}151#endif152 153 154#endif /* __LINUX_OF_MDIO_H */155