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TOMOYO Linux Cross Reference
Linux/include/linux/of_mdio.h

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  1 /*
  2  * OF helpers for the MDIO (Ethernet PHY) API
  3  *
  4  * Copyright (c) 2009 Secret Lab Technologies, Ltd.
  5  *
  6  * This file is released under the GPLv2
  7  */
  8 
  9 #ifndef __LINUX_OF_MDIO_H
 10 #define __LINUX_OF_MDIO_H
 11 
 12 #include <linux/phy.h>
 13 #include <linux/of.h>
 14 
 15 #if IS_ENABLED(CONFIG_OF_MDIO)
 16 extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);
 17 extern struct phy_device *of_phy_find_device(struct device_node *phy_np);
 18 extern struct phy_device *of_phy_connect(struct net_device *dev,
 19                                          struct device_node *phy_np,
 20                                          void (*hndlr)(struct net_device *),
 21                                          u32 flags, phy_interface_t iface);
 22 extern struct phy_device *
 23 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
 24                        void (*hndlr)(struct net_device *));
 25 struct phy_device *of_phy_attach(struct net_device *dev,
 26                                  struct device_node *phy_np, u32 flags,
 27                                  phy_interface_t iface);
 28 
 29 extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
 30 extern int of_phy_register_fixed_link(struct device_node *np);
 31 extern void of_phy_deregister_fixed_link(struct device_node *np);
 32 extern bool of_phy_is_fixed_link(struct device_node *np);
 33 
 34 
 35 static inline int of_mdio_parse_addr(struct device *dev,
 36                                      const struct device_node *np)
 37 {
 38         u32 addr;
 39         int ret;
 40 
 41         ret = of_property_read_u32(np, "reg", &addr);
 42         if (ret < 0) {
 43                 dev_err(dev, "%s has invalid PHY address\n", np->full_name);
 44                 return ret;
 45         }
 46 
 47         /* A PHY must have a reg property in the range [0-31] */
 48         if (addr >= PHY_MAX_ADDR) {
 49                 dev_err(dev, "%s PHY address %i is too large\n",
 50                         np->full_name, addr);
 51                 return -EINVAL;
 52         }
 53 
 54         return addr;
 55 }
 56 
 57 #else /* CONFIG_OF_MDIO */
 58 static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 59 {
 60         /*
 61          * Fall back to the non-DT function to register a bus.
 62          * This way, we don't have to keep compat bits around in drivers.
 63          */
 64 
 65         return mdiobus_register(mdio);
 66 }
 67 
 68 static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)
 69 {
 70         return NULL;
 71 }
 72 
 73 static inline struct phy_device *of_phy_connect(struct net_device *dev,
 74                                                 struct device_node *phy_np,
 75                                                 void (*hndlr)(struct net_device *),
 76                                                 u32 flags, phy_interface_t iface)
 77 {
 78         return NULL;
 79 }
 80 
 81 static inline struct phy_device *
 82 of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
 83                        void (*hndlr)(struct net_device *))
 84 {
 85         return NULL;
 86 }
 87 
 88 static inline struct phy_device *of_phy_attach(struct net_device *dev,
 89                                                struct device_node *phy_np,
 90                                                u32 flags, phy_interface_t iface)
 91 {
 92         return NULL;
 93 }
 94 
 95 static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
 96 {
 97         return NULL;
 98 }
 99 
100 static inline int of_mdio_parse_addr(struct device *dev,
101                                      const struct device_node *np)
102 {
103         return -ENOSYS;
104 }
105 static inline int of_phy_register_fixed_link(struct device_node *np)
106 {
107         return -ENOSYS;
108 }
109 static inline void of_phy_deregister_fixed_link(struct device_node *np)
110 {
111 }
112 static inline bool of_phy_is_fixed_link(struct device_node *np)
113 {
114         return false;
115 }
116 #endif
117 
118 
119 #endif /* __LINUX_OF_MDIO_H */
120 

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