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From: Andrew Lunn <andrew@lunn.ch>
Date: Sat, 06 Apr 2024 15:16:00 -0500
Subject: [PATCH net-next 2/2] net: lan743x: Fixup EEE
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Message-Id: <20240406-lan78xx-eee-v1-2-2993b14b849c@lunn.ch>
References: <20240406-lan78xx-eee-v1-0-2993b14b849c@lunn.ch>
In-Reply-To: <20240406-lan78xx-eee-v1-0-2993b14b849c@lunn.ch>
To: Woojung Huh <woojung.huh@microchip.com>, UNGLinuxDriver@microchip.com, 
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, 
 Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, 
 Bryan Whitehead <bryan.whitehead@microchip.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>, 
 Oleksij Rempel <o.rempel@pengutronix.de>, 
 "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>, 
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Andrew Lunn <andrew@lunn.ch>

The enabling/disabling of EEE in the MAC should happen as a result of
auto negotiation. So move the enable/disable into
lan743x_phy_link_status_change() which gets called by phylib when
there is a change in link status.

lan743x_ethtool_set_eee() now just programs the hardware with the LTI
timer value, and passed everything else to phylib, so it can correctly
setup the PHY.

lan743x_ethtool_get_eee() relies on phylib doing most of the work, the
MAC driver just adds the LTI timer value.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/ethernet/microchip/lan743x_ethtool.c | 21 ---------------------
 drivers/net/ethernet/microchip/lan743x_main.c    |  7 +++++++
 2 files changed, 7 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index 8a6ae171e375..d0f4ff4ee075 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -1076,15 +1076,10 @@ static int lan743x_ethtool_get_eee(struct net_device *netdev,
 
 	buf = lan743x_csr_read(adapter, MAC_CR);
 	if (buf & MAC_CR_EEE_EN_) {
-		eee->eee_enabled = true;
-		eee->tx_lpi_enabled = true;
 		/* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */
 		buf = lan743x_csr_read(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT);
 		eee->tx_lpi_timer = buf;
 	} else {
-		eee->eee_enabled = false;
-		eee->eee_active = false;
-		eee->tx_lpi_enabled = false;
 		eee->tx_lpi_timer = 0;
 	}
 
@@ -1097,7 +1092,6 @@ static int lan743x_ethtool_set_eee(struct net_device *netdev,
 	struct lan743x_adapter *adapter;
 	struct phy_device *phydev;
 	u32 buf = 0;
-	int ret = 0;
 
 	if (!netdev)
 		return -EINVAL;
@@ -1114,23 +1108,8 @@ static int lan743x_ethtool_set_eee(struct net_device *netdev,
 	}
 
 	if (eee->eee_enabled) {
-		ret = phy_init_eee(phydev, false);
-		if (ret) {
-			netif_err(adapter, drv, adapter->netdev,
-				  "EEE initialization failed\n");
-			return ret;
-		}
-
 		buf = (u32)eee->tx_lpi_timer;
 		lan743x_csr_write(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT, buf);
-
-		buf = lan743x_csr_read(adapter, MAC_CR);
-		buf |= MAC_CR_EEE_EN_;
-		lan743x_csr_write(adapter, MAC_CR, buf);
-	} else {
-		buf = lan743x_csr_read(adapter, MAC_CR);
-		buf &= ~MAC_CR_EEE_EN_;
-		lan743x_csr_write(adapter, MAC_CR, buf);
 	}
 
 	return phy_ethtool_set_eee(phydev, eee);
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 75a988c0bd79..d37a49cd5c69 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -1462,6 +1462,13 @@ static void lan743x_phy_link_status_change(struct net_device *netdev)
 		    phydev->interface == PHY_INTERFACE_MODE_1000BASEX ||
 		    phydev->interface == PHY_INTERFACE_MODE_2500BASEX)
 			lan743x_sgmii_config(adapter);
+
+		data = lan743x_csr_read(adapter, MAC_CR);
+		if (phydev->enable_tx_lpi)
+			data |=  MAC_CR_EEE_EN_;
+		else
+			data &= ~MAC_CR_EEE_EN_;
+		lan743x_csr_write(adapter, MAC_CR, data);
 	}
 }
 

-- 
2.43.0