net: emaclite: Don't advertise 1000BASE-T and do auto negotiation

[ Upstream commit b800528 ]

In xemaclite_open() function we are setting the max speed of
emaclite to 100Mb using phy_set_max_speed() function so,
there is no need to write the advertising registers to stop
giga-bit speed and the phy_start() function starts the
auto-negotiation so, there is no need to handle it separately
using advertising registers. Remove the phy_read and phy_write
of advertising registers in xemaclite_open() function.

Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/ethernet/xilinx/xilinx_emaclite.c

@@ -932,8 +932,6 @@ static int xemaclite_open(struct net_device *dev)
 	xemaclite_disable_interrupts(lp);
 
 	if (lp->phy_node) {
-		u32 bmcr;
-
 		lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
 					     xemaclite_adjust_link, 0,
 					     PHY_INTERFACE_MODE_MII);
@@ -944,19 +942,6 @@ static int xemaclite_open(struct net_device *dev)
 
 		/* EmacLite doesn't support giga-bit speeds */
 		phy_set_max_speed(lp->phy_dev, SPEED_100);
-
-		/* Don't advertise 1000BASE-T Full/Half duplex speeds */
-		phy_write(lp->phy_dev, MII_CTRL1000, 0);
-
-		/* Advertise only 10 and 100mbps full/half duplex speeds */
-		phy_write(lp->phy_dev, MII_ADVERTISE, ADVERTISE_ALL |
-			  ADVERTISE_CSMA);
-
-		/* Restart auto negotiation */
-		bmcr = phy_read(lp->phy_dev, MII_BMCR);
-		bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
-		phy_write(lp->phy_dev, MII_BMCR, bmcr);
-
 		phy_start(lp->phy_dev);
 	}