1 files changed, 47 insertions, 5 deletions

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 7224c4099a28..77c4ed60b982 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -99,7 +99,14 @@ struct mii_bus {
          */
         struct mutex mdio_lock;
 
-        struct device *dev;
+        struct device *parent;
+        enum {
+                MDIOBUS_ALLOCATED = 1,
+                MDIOBUS_REGISTERED,
+                MDIOBUS_UNREGISTERED,
+                MDIOBUS_RELEASED,
+        } state;
+        struct device dev;
 
         /* list of all PHYs on bus */
         struct phy_device *phy_map[PHY_MAX_ADDR];
@@ -113,6 +120,16 @@ struct mii_bus {
          */
         int *irq;
 };
+#define to_mii_bus(d) container_of(d, struct mii_bus, dev)
+
+struct mii_bus *mdiobus_alloc(void);
+int mdiobus_register(struct mii_bus *bus);
+void mdiobus_unregister(struct mii_bus *bus);
+void mdiobus_free(struct mii_bus *bus);
+struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
+int mdiobus_read(struct mii_bus *bus, int addr, u16 regnum);
+int mdiobus_write(struct mii_bus *bus, int addr, u16 regnum, u16 val);
+
 
 #define PHY_INTERRUPT_DISABLED  0x0
 #define PHY_INTERRUPT_ENABLED   0x80000000
@@ -391,8 +408,35 @@ struct phy_fixup {
         int (*run)(struct phy_device *phydev);
 };
 
-int phy_read(struct phy_device *phydev, u16 regnum);
-int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
+/**
+ * phy_read - Convenience function for reading a given PHY register
+ * @phydev: the phy_device struct
+ * @regnum: register number to read
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+static inline int phy_read(struct phy_device *phydev, u16 regnum)
+{
+        return mdiobus_read(phydev->bus, phydev->addr, regnum);
+}
+
+/**
+ * phy_write - Convenience function for writing a given PHY register
+ * @phydev: the phy_device struct
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+static inline int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
+{
+        return mdiobus_write(phydev->bus, phydev->addr, regnum, val);
+}
+
 int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id);
 struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
 int phy_clear_interrupt(struct phy_device *phydev);
@@ -408,8 +452,6 @@ void phy_start(struct phy_device *phydev);
 void phy_stop(struct phy_device *phydev);
 int phy_start_aneg(struct phy_device *phydev);
 
-int mdiobus_register(struct mii_bus *bus);
-void mdiobus_unregister(struct mii_bus *bus);
 void phy_sanitize_settings(struct phy_device *phydev);
 int phy_stop_interrupts(struct phy_device *phydev);
 int phy_enable_interrupts(struct phy_device *phydev);