diff options
Diffstat (limited to 'include/linux/of_mdio.h')
| -rw-r--r-- | include/linux/of_mdio.h | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h index a58cca8bcb29..f5db93bcd069 100644 --- a/include/linux/of_mdio.h +++ b/include/linux/of_mdio.h @@ -12,7 +12,7 @@ #include <linux/phy.h> #include <linux/of.h> -#ifdef CONFIG_OF +#if IS_ENABLED(CONFIG_OF_MDIO) extern int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np); extern struct phy_device *of_phy_find_device(struct device_node *phy_np); extern struct phy_device *of_phy_connect(struct net_device *dev, @@ -27,12 +27,34 @@ struct phy_device *of_phy_attach(struct net_device *dev, phy_interface_t iface); extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np); -extern int of_mdio_parse_addr(struct device *dev, const struct device_node *np); extern int of_phy_register_fixed_link(struct device_node *np); extern void of_phy_deregister_fixed_link(struct device_node *np); extern bool of_phy_is_fixed_link(struct device_node *np); -#else /* CONFIG_OF */ + +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 int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) { /* |