diff options
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/phy.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/phy.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/phy.c b/drivers/net/ethernet/intel/e1000e/phy.c index bd5ef64b3003..ad22b8c8abd2 100644 --- a/drivers/net/ethernet/intel/e1000e/phy.c +++ b/drivers/net/ethernet/intel/e1000e/phy.c @@ -722,8 +722,24 @@ s32 e1000e_copper_link_setup_m88(struct e1000_hw *hw) phy_data |= M88E1000_PSCR_POLARITY_REVERSAL; /* Enable downshift on BM (disabled by default) */ - if (phy->type == e1000_phy_bm) + if (phy->type == e1000_phy_bm) { + /* For 82574/82583, first disable then enable downshift */ + if (phy->id == BME1000_E_PHY_ID_R2) { + phy_data &= ~BME1000_PSCR_ENABLE_DOWNSHIFT; + ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, + phy_data); + if (ret_val) + return ret_val; + /* Commit the changes. */ + ret_val = e1000e_commit_phy(hw); + if (ret_val) { + e_dbg("Error committing the PHY changes\n"); + return ret_val; + } + } + phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT; + } ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data); if (ret_val) |