diff options
Diffstat (limited to 'drivers/net/igb/e1000_phy.c')
| -rw-r--r-- | drivers/net/igb/e1000_phy.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/igb/e1000_phy.c b/drivers/net/igb/e1000_phy.c index 3670a66401b..cf1f3230092 100644 --- a/drivers/net/igb/e1000_phy.c +++ b/drivers/net/igb/e1000_phy.c @@ -1931,6 +1931,41 @@ s32 igb_phy_init_script_igp3(struct e1000_hw *hw) } /** + * igb_power_up_phy_copper - Restore copper link in case of PHY power down + * @hw: pointer to the HW structure + * + * In the case of a PHY power down to save power, or to turn off link during a + * driver unload, restore the link to previous settings. + **/ +void igb_power_up_phy_copper(struct e1000_hw *hw) +{ + u16 mii_reg = 0; + + /* 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; + hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg); +} + +/** + * igb_power_down_phy_copper - Power down copper PHY + * @hw: pointer to the HW structure + * + * Power down PHY to save power when interface is down and wake on lan + * is not enabled. + **/ +void igb_power_down_phy_copper(struct e1000_hw *hw) +{ + u16 mii_reg = 0; + + /* 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; + hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg); + msleep(1); +} + +/** * igb_check_polarity_82580 - Checks the polarity. * @hw: pointer to the HW structure * |