[PATCH 1/2] PHYLIB: Add get_link ethtool helper function

[Nathaniel Case <ncase@xes-inc.com>]

This adds a phy_ethtool_get_link() function along the same lines as
phy_ethtool_gset().  This provides drivers utilizing PHYLIB an
alternative to using ethtool_op_get_link().  This is more desirable
since the "Link detected" field in ethtool would actually reflect the
state of the PHY register.

Patch depends on previous patch (0/2).

Signed-off-by: Nate Case <ncase@xes-inc.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

---

--- a/drivers/net/phy/phy.c	2006-06-04 16:01:59.000000000 -0500
+++ b/drivers/net/phy/phy.c	2006-06-05 10:55:31.000000000 -0500
@@ -301,6 +301,22 @@
 	return 0;
 }
 
+/* 
+ * phy_ethtool_get_link:
+ * A generic ethtool get_link function which is more accurate than
+ * the network interface carrier status since it queries the
+ * PHY directly.
+ */
+u32 phy_ethtool_get_link(struct phy_device *phydev)
+{
+	int err;
+
+	err = genphy_update_link(phydev);
+	if (err)
+		return 0;
+
+	return (u32) phydev->link;
+}
 
 /* Note that this function is currently incompatible with the
  * PHYCONTROL layer.  It changes registers without regard to
--- a/include/linux/phy.h	2006-06-05 11:33:59.000000000 -0500
+++ b/include/linux/phy.h	2006-06-04 19:31:51.000000000 -0500
@@ -374,6 +374,7 @@
 void phy_stop_machine(struct phy_device *phydev);
 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
+u32 phy_ethtool_get_link(struct phy_device *phydev);
 int phy_mii_ioctl(struct phy_device *phydev,
 		struct mii_ioctl_data *mii_data, int cmd);
 int phy_start_interrupts(struct phy_device *phydev);