net: mdio: Add helper functions for accessing MDIO devices

This adds some helpers for accessing non-phy MDIO devices. They are
analogous to phy_(read|write|modify), except that they take an mdio_device
and not a phy_device.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index f622888a4ba826771142521090bdd987348f31b2..9f3587a61e145ccdbc08abe8e31e65634ebee351 100644 (file)
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -352,6 +352,30 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
 int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
                           u16 mask, u16 set);
 
+static inline int mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
+{
+       return mdiobus_read(mdiodev->bus, mdiodev->addr, regnum);
+}
+
+static inline int mdiodev_write(struct mdio_device *mdiodev, u32 regnum,
+                               u16 val)
+{
+       return mdiobus_write(mdiodev->bus, mdiodev->addr, regnum, val);
+}
+
+static inline int mdiodev_modify(struct mdio_device *mdiodev, u32 regnum,
+                                u16 mask, u16 set)
+{
+       return mdiobus_modify(mdiodev->bus, mdiodev->addr, regnum, mask, set);
+}
+
+static inline int mdiodev_modify_changed(struct mdio_device *mdiodev,
+                                        u32 regnum, u16 mask, u16 set)
+{
+       return mdiobus_modify_changed(mdiodev->bus, mdiodev->addr, regnum,
+                                     mask, set);
+}
+
 static inline u32 mdiobus_c45_addr(int devad, u16 regnum)
 {
        return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;