Commit 4e03510b authored by Bruce Allan's avatar Bruce Allan Committed by Jeff Kirsher
Browse files

e1000e: fix PHY init workarounds for i217/i218

Toggling the LANPHYPC Value bit cycles the power on the PHY and sets it
back to power-on defaults.  This includes setting it's MAC-PHY messaging
mode to use the PCIe-like interconnect, so the MAC must also be set back
from SMBus mode to PCIe mode otherwise the PHY can be inaccessible.

Signed-off-by: default avatarBruce Allan <>
Tested-by: default avatarJeff Pieper <>
Signed-off-by: default avatarJeff Kirsher <>
parent ed1a4265
......@@ -426,6 +426,15 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw)
ew32(FEXTNVM3, mac_reg);
if (hw->mac.type == e1000_pch_lpt) {
/* Toggling LANPHYPC brings the PHY out of SMBus mode
* So ensure that the MAC is also out of SMBus mode
mac_reg = er32(CTRL_EXT);
mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS;
ew32(CTRL_EXT, mac_reg);
/* Toggle LANPHYPC Value bit */
mac_reg = er32(CTRL);
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