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e1000e: Additional PHY power saving in S0ix

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After transferring the MAC-PHY interface to the SMBus set the PHY
to S0ix low power idle mode.

Suggested-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Sasha Neftin 2021-06-24 11:19:08 +03:00 committed by Tony Nguyen
parent ef407b86d3
commit 3ad3e28cb2
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/intel/e1000e/netdev.c
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@ -6378,10 +6378,16 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter)
ew32(CTRL_EXT, mac_data);
/* DFT control: PHY bit: page769_20[0] = 1
* page769_20[7] - PHY PLL stop
* page769_20[8] - PHY go to the electrical idle
* page769_20[9] - PHY serdes disable
* Gate PPW via EXTCNF_CTRL - set 0x0F00[7] = 1
*/
e1e_rphy(hw, I82579_DFT_CTRL, &phy_data);
phy_data |= BIT(0);
phy_data |= BIT(7);
phy_data |= BIT(8);
phy_data |= BIT(9);
e1e_wphy(hw, I82579_DFT_CTRL, phy_data);
mac_data = er32(EXTCNF_CTRL);