[PATCH 6.12.y 1/2] net: phy: add phy_disable_eee

[Sasha Levin <sashal@kernel.org>]

From: Heiner Kallweit <hkallweit1@gmail.com>

[ Upstream commit b55498ff14bd14860d48dc8d2a0b6889b218c408 ]

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 <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/fd51738c-dcd6-4d61-b8c5-faa6ac0f1026@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 84a905290cb4 ("net: phy: dp83867: Disable EEE support as not implemented")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/phy/phy_device.c | 16 ++++++++++++++++
 include/linux/phy.h          |  1 +
 2 files changed, 17 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 834624a61060e..1a0c51a7702e5 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3045,6 +3045,22 @@ 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
diff --git a/include/linux/phy.h b/include/linux/phy.h
index dfc7b97f9648d..1888924bca77d 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -2030,6 +2030,7 @@ 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);
-- 
2.51.0