netdev - [PATCH net v2 1/2] net: emaclite: Don't advertise 1000BASE-T and do auto negotiation

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Message-ID: <1651261770-6025-2-git-send-email-radhey.shyam.pandey@xilinx.com>
Date:   Sat, 30 Apr 2022 01:19:29 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <michal.simek@...inx.com>, <andrew@...n.ch>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <git@...inx.com>, Shravya Kumbham <shravya.kumbham@...inx.com>,
        "Radhey Shyam Pandey" <radhey.shyam.pandey@...inx.com>
Subject: [PATCH net v2 1/2] net: emaclite: Don't advertise 1000BASE-T and do auto negotiation

From: Shravya Kumbham <shravya.kumbham@...inx.com>

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@...inx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
Changes for v2:
Added Andrew's Reviewed-by tag.
---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 7a86ae82fcc1..f9cf86e26936 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -907,8 +907,6 @@ 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);
@@ -919,19 +917,6 @@ 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);
 	}
 
-- 
2.7.4