| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * OF helpers for the MDIO (Ethernet PHY) API |
| 4 | * |
| 5 | * Copyright (c) 2009 Secret Lab Technologies, Ltd. |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #ifndef __LINUX_OF_MDIO_H |
| 9 | #define __LINUX_OF_MDIO_H |
| 10 | |
| 11 | #include <linux/phy.h> |
| 12 | #include <linux/of.h> |
| 13 | |
| 14 | #if IS_ENABLED(CONFIG_OF_MDIO) |
| 15 | extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np); |
| 16 | extern struct phy_device *of_phy_find_device(struct device_node *phy_np); |
| 17 | extern struct phy_device *of_phy_connect(struct net_device *dev, |
| 18 | struct device_node *phy_np, |
| 19 | void (*hndlr)(struct net_device *), |
| 20 | u32 flags, phy_interface_t iface); |
| 21 | extern struct phy_device * |
| 22 | of_phy_get_and_connect(struct net_device *dev, struct device_node *np, |
| 23 | void (*hndlr)(struct net_device *)); |
| 24 | struct phy_device *of_phy_attach(struct net_device *dev, |
| 25 | struct device_node *phy_np, u32 flags, |
| 26 | phy_interface_t iface); |
| 27 | |
| 28 | extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np); |
| 29 | extern int of_phy_register_fixed_link(struct device_node *np); |
| 30 | extern void of_phy_deregister_fixed_link(struct device_node *np); |
| 31 | extern bool of_phy_is_fixed_link(struct device_node *np); |
| 32 | |
| 33 | |
| 34 | static inline int of_mdio_parse_addr(struct device *dev, |
| 35 | const struct device_node *np) |
| 36 | { |
| 37 | u32 addr; |
| 38 | int ret; |
| 39 | |
| 40 | ret = of_property_read_u32(np, "reg", &addr); |
| 41 | if (ret < 0) { |
| 42 | dev_err(dev, "%s has invalid PHY address\n", np->full_name); |
| 43 | return ret; |
| 44 | } |
| 45 | |
| 46 | /* A PHY must have a reg property in the range [0-31] */ |
| 47 | if (addr >= PHY_MAX_ADDR) { |
| 48 | dev_err(dev, "%s PHY address %i is too large\n", |
| 49 | np->full_name, addr); |
| 50 | return -EINVAL; |
| 51 | } |
| 52 | |
| 53 | return addr; |
| 54 | } |
| 55 | |
| 56 | #else /* CONFIG_OF_MDIO */ |
| 57 | static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) |
| 58 | { |
| 59 | /* |
| 60 | * Fall back to the non-DT function to register a bus. |
| 61 | * This way, we don't have to keep compat bits around in drivers. |
| 62 | */ |
| 63 | |
| 64 | return mdiobus_register(mdio); |
| 65 | } |
| 66 | |
| 67 | static inline struct phy_device *of_phy_find_device(struct device_node *phy_np) |
| 68 | { |
| 69 | return NULL; |
| 70 | } |
| 71 | |
| 72 | static inline struct phy_device *of_phy_connect(struct net_device *dev, |
| 73 | struct device_node *phy_np, |
| 74 | void (*hndlr)(struct net_device *), |
| 75 | u32 flags, phy_interface_t iface) |
| 76 | { |
| 77 | return NULL; |
| 78 | } |
| 79 | |
| 80 | static inline struct phy_device * |
| 81 | of_phy_get_and_connect(struct net_device *dev, struct device_node *np, |
| 82 | void (*hndlr)(struct net_device *)) |
| 83 | { |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | static inline struct phy_device *of_phy_attach(struct net_device *dev, |
| 88 | struct device_node *phy_np, |
| 89 | u32 flags, phy_interface_t iface) |
| 90 | { |
| 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np) |
| 95 | { |
| 96 | return NULL; |
| 97 | } |
| 98 | |
| 99 | static inline int of_mdio_parse_addr(struct device *dev, |
| 100 | const struct device_node *np) |
| 101 | { |
| 102 | return -ENOSYS; |
| 103 | } |
| 104 | static inline int of_phy_register_fixed_link(struct device_node *np) |
| 105 | { |
| 106 | return -ENOSYS; |
| 107 | } |
| 108 | static inline void of_phy_deregister_fixed_link(struct device_node *np) |
| 109 | { |
| 110 | } |
| 111 | static inline bool of_phy_is_fixed_link(struct device_node *np) |
| 112 | { |
| 113 | return false; |
| 114 | } |
| 115 | #endif |
| 116 | |
| 117 | |
| 118 | #endif /* __LINUX_OF_MDIO_H */ |