net: phy: add phy_disable_eee

If a MAC driver doesn't support EEE, then the PHY shouldn't advertise it.
Add phy_disable_eee() for this purpose.

Signed-off-by: Heiner Kallweit <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: hkallweit

drivers/net/phy/phy_device.c

@@ -3003,6 +3003,22 @@ void phy_support_eee(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_support_eee);
 
+/**
+ * phy_disable_eee - Disable EEE for the PHY
+ * @phydev: Target phy_device struct
+ *
+ * This function is used by MAC drivers for MAC's which don't support EEE.
+ * It disables EEE on the PHY layer.
+ */
+void phy_disable_eee(struct phy_device *phydev)
+{
+	linkmode_zero(phydev->supported_eee);
+	linkmode_zero(phydev->advertising_eee);
+	phydev->eee_cfg.tx_lpi_enabled = false;
+	phydev->eee_cfg.eee_enabled = false;
+}
+EXPORT_SYMBOL_GPL(phy_disable_eee);
+
 /**
  * phy_support_sym_pause - Enable support of symmetrical pause
  * @phydev: target phy_device struct

include/linux/phy.h

@@ -2071,6 +2071,7 @@ void phy_advertise_eee_all(struct phy_device *phydev);
 void phy_support_sym_pause(struct phy_device *phydev);
 void phy_support_asym_pause(struct phy_device *phydev);
 void phy_support_eee(struct phy_device *phydev);
+void phy_disable_eee(struct phy_device *phydev);
 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
 		       bool autoneg);
 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx);