[net-next 11/15] ixgbe: correct CS4223/7 PHY identification

[Jeff Kirsher]

From: Emil Tantilov <emil.s.tanti...@intel.com>

Previous method was unreliable. Use a different register to
differentiate between the SKUs.

Signed-off-by: Emil Tantilov <emil.s.tanti...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h  | 5 +++--
 drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 8 ++++----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h
index 5aa2c3cf7aec..b0cac961df3b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h
@@ -84,8 +84,9 @@
 #define IXGBE_CS4227_GLOBAL_ID_LSB             0
 #define IXGBE_CS4227_GLOBAL_ID_MSB             1
 #define IXGBE_CS4227_SCRATCH                   2
-#define IXGBE_CS4223_PHY_ID                    0x7003  /* Quad port */
-#define IXGBE_CS4227_PHY_ID                    0x3003  /* Dual port */
+#define IXGBE_CS4227_EFUSE_PDF_SKU             0x19F
+#define IXGBE_CS4223_SKU_ID                    0x0010  /* Quad port */
+#define IXGBE_CS4227_SKU_ID                    0x0014  /* Dual port */
 #define IXGBE_CS4227_RESET_PENDING             0x1357
 #define IXGBE_CS4227_RESET_COMPLETE            0x5AA5
 #define IXGBE_CS4227_RETRIES                   15
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
index 50aaa2bd3c81..32b35efde2df 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
@@ -1807,16 +1807,16 @@ ixgbe_setup_mac_link_sfp_x550a(struct ixgbe_hw *hw, 
ixgbe_link_speed speed,
        if (hw->phy.mdio.prtad == MDIO_PRTAD_NONE)
                return IXGBE_ERR_PHY_ADDR_INVALID;
 
-       /* Get external PHY device id */
-       ret_val = hw->phy.ops.read_reg(hw, IXGBE_CS4227_GLOBAL_ID_MSB,
-                                 IXGBE_MDIO_ZERO_DEV_TYPE, &reg_phy_ext);
+       /* Get external PHY SKU id */
+       ret_val = hw->phy.ops.read_reg(hw, IXGBE_CS4227_EFUSE_PDF_SKU,
+                                      IXGBE_MDIO_ZERO_DEV_TYPE, &reg_phy_ext);
        if (ret_val)
                return ret_val;
 
        /* When configuring quad port CS4223, the MAC instance is part
         * of the slice offset.
         */
-       if (reg_phy_ext == IXGBE_CS4223_PHY_ID)
+       if (reg_phy_ext == IXGBE_CS4223_SKU_ID)
                slice_offset = (hw->bus.lan_id +
                                (hw->bus.instance_id << 1)) << 12;
        else
-- 
2.12.2