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Diffstat (limited to 'include/linux/of_mdio.h')
-rw-r--r--include/linux/of_mdio.h24
1 files changed, 23 insertions, 1 deletions
diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h
index ba35ba520487..f5db93bcd069 100644
--- a/include/linux/of_mdio.h
+++ b/include/linux/of_mdio.h
@@ -27,11 +27,33 @@ 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);
+
+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)
{