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igc: Remove temporary workaround

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PHY_CONTROL register works as defined in the IEEE 802.3 specification
(IEEE 802.3-2008 22.2.4.1). Tidy up the temporary workaround.

User impact: PHY can now be powered down when the ethernet link is down.

Testing hints: ip link set down <device> (or just disconnect the
ethernet cable).

Oldest tested NVM version is: 1045:740.

Fixes: 5586838fe9 ("igc: Add code for PHY support")
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Sasha Neftin 2024-01-24 07:57:00 +02:00 committed by Tony Nguyen
parent c56d055893
commit 55ea989977
1 changed files with 1 additions and 5 deletions
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6
drivers/net/ethernet/intel/igc/igc_phy.c
View file

@ -130,11 +130,7 @@ void igc_power_down_phy_copper(struct igc_hw *hw)
/* The PHY will retain its settings across a power down/up cycle */
hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
mii_reg |= MII_CR_POWER_DOWN;
/* Temporary workaround - should be removed when PHY will implement
* IEEE registers as properly
*/
/* hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);*/
hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
usleep_range(1000, 2000);
}