ixgbe/base: disable software LPLU implementation for X557 V2

This patch disables SW LPLU on x557 V2. It also sets the
enter_lplu function pointer to NULL on x557 V2. LPLU will be
implemented in FW for all x557 V2 interfaces. The SW LPLU
implementation must be disabled on V2 to avoid conflicts with
FW. SW LPLU support is still required for x557 V1.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>

diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index 12c6ca2..3b6f517 100644 (file)
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -1540,7 +1540,11 @@ s32 ixgbe_init_phy_ops_X550em(struct ixgbe_hw *hw)
                        ret_val = ixgbe_setup_kr_speed_x550em(hw, speed);
                }
 
-               phy->ops.enter_lplu = ixgbe_enter_lplu_t_x550em;
+               /* setup SW LPLU only for first revision */
+               if (!(IXGBE_FUSES0_REV1 & IXGBE_READ_REG(hw,
+                                                      IXGBE_FUSES0_GROUP(0))))
+                       phy->ops.enter_lplu = ixgbe_enter_lplu_t_x550em;
+
                phy->ops.handle_lasi = ixgbe_handle_lasi_ext_t_x550em;
                phy->ops.reset = ixgbe_reset_phy_t_X550em;
                break;
@@ -2740,6 +2744,10 @@ s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw)
        u32 save_autoneg;
        bool link_up;
 
+       /* SW LPLU not required on later HW revisions. */
+       if (IXGBE_FUSES0_REV1 & IXGBE_READ_REG(hw, IXGBE_FUSES0_GROUP(0)))
+               return IXGBE_SUCCESS;
+
        /* If blocked by MNG FW, then don't restart AN */
        if (ixgbe_check_reset_blocked(hw))
                return IXGBE_SUCCESS;