drivers/net: Remove unnecessary returns from void function()s

[karo-tx-linux.git] / drivers / net / igb / e1000_phy.c

diff --git a/drivers/net/igb/e1000_phy.c b/drivers/net/igb/e1000_phy.c
index 3670a66401b87923d5ff3dc82cc67f1701cc4986..cf1f323009233aed82c601b0d73454bdfe7200e1 100644 (file)
--- a/drivers/net/igb/e1000_phy.c
+++ b/drivers/net/igb/e1000_phy.c
@@ -1930,6 +1930,41 @@ s32 igb_phy_init_script_igp3(struct e1000_hw *hw)
        return 0;
 }
 
+/**
+ * igb_power_up_phy_copper - Restore copper link in case of PHY power down
+ * @hw: pointer to the HW structure
+ *
+ * In the case of a PHY power down to save power, or to turn off link during a
+ * driver unload, restore the link to previous settings.
+ **/
+void igb_power_up_phy_copper(struct e1000_hw *hw)
+{
+       u16 mii_reg = 0;
+
+       /* The PHY will retain its settings across a power down/up cycle */
+       hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
+       mii_reg &= ~MII_CR_POWER_DOWN;
+       hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
+}
+
+/**
+ * igb_power_down_phy_copper - Power down copper PHY
+ * @hw: pointer to the HW structure
+ *
+ * Power down PHY to save power when interface is down and wake on lan
+ * is not enabled.
+ **/
+void igb_power_down_phy_copper(struct e1000_hw *hw)
+{
+       u16 mii_reg = 0;
+
+       /* The PHY will retain its settings across a power down/up cycle */
+       hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
+       mii_reg |= MII_CR_POWER_DOWN;
+       hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
+       msleep(1);
+}
+
 /**
  *  igb_check_polarity_82580 - Checks the polarity.
  *  @hw: pointer to the HW structure