ixgbe: Add a PHY power state method

This new method will control the PHY power state.  You pass in the
state you wish to change to (ether on or off).  For cases where this
method is not used the current PHY power state behavior is maintained.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
index 47ac0bc..22646c3 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -2140,3 +2140,36 @@ s32 ixgbe_tn_check_overtemp(struct ixgbe_hw *hw)
 
 	return IXGBE_ERR_OVERTEMP;
 }
+
+/** ixgbe_set_copper_phy_power - Control power for copper phy
+ *  @hw: pointer to hardware structure
+ *  @on: true for on, false for off
+ **/
+s32 ixgbe_set_copper_phy_power(struct ixgbe_hw *hw, bool on)
+{
+	u32 status;
+	u16 reg;
+
+	/* Bail if we don't have copper phy */
+	if (hw->mac.ops.get_media_type(hw) != ixgbe_media_type_copper)
+		return 0;
+
+	status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_VENDOR_SPECIFIC_1_CONTROL,
+				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
+				      &reg);
+	if (status)
+		return status;
+
+	if (on) {
+		reg &= ~IXGBE_MDIO_PHY_SET_LOW_POWER_MODE;
+	} else {
+		if (ixgbe_check_reset_blocked(hw))
+			return 0;
+		reg |= IXGBE_MDIO_PHY_SET_LOW_POWER_MODE;
+	}
+
+	status = hw->phy.ops.write_reg(hw, IXGBE_MDIO_VENDOR_SPECIFIC_1_CONTROL,
+				       IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
+				       reg);
+	return status;
+}