diff --git a/drivers/net/phy/atheros.c b/drivers/net/phy/atheros.c
index d509e30..ba57b1a 100644
--- a/drivers/net/phy/atheros.c
+++ b/drivers/net/phy/atheros.c
@@ -51,7 +51,7 @@ static struct phy_driver AR8031_driver =  {
        .uid = 0x4dd074,
        .mask = 0xffffffef,
        .features = PHY_GBIT_FEATURES,
-       .config = ar8021_config,
+       .config = ar8035_config,
        .startup = genphy_startup,
        .shutdown = genphy_shutdown,
};



commit ce412b79e72557702185443501478646a938b5fe
Author: Mugunthan V N <mugunthanvnm@ti.com>
Date:   Thu Oct 13 19:33:36 2016 +0530

    drivers: net: phy: atheros: add separate config for AR8031

    In the current driver implementation, config() callback is common
    for AR8035 and AR8031 phy. In config() callback, driver tries to
    configure MMD Access Control Register and MMD Access Address Data
    Register unconditionally for both phy versions which leads to
    auto negotiation failure in AM335x EVMsk second port which uses
    AR8031 Giga bit RGMII phy. Fixing this by adding separate config
    for AR8031 phy.

    Reviewed-by: Sekhar Nori <nsekhar@ti.com>
    Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
    Acked-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/drivers/net/phy/atheros.c b/drivers/net/phy/atheros.c
index 694a338..b34cdd3 100644
--- a/drivers/net/phy/atheros.c
+++ b/drivers/net/phy/atheros.c

@@ -8,6 +8,15 @@
  */
#include <phy.h>

+#define AR803x_PHY_DEBUG_ADDR_REG      0x1d
+#define AR803x_PHY_DEBUG_DATA_REG      0x1e
+
+#define AR803x_DEBUG_REG_5             0x5
+#define AR803x_RGMII_TX_CLK_DLY                0x100
+
+#define AR803x_DEBUG_REG_0             0x0
+#define AR803x_RGMII_RX_CLK_DLY                0x8000
+
static int ar8021_config(struct phy_device *phydev)
{
        phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
@@ -17,6 +26,32 @@ static int ar8021_config(struct phy_device *phydev)
        return 0;
}

+static int ar8031_config(struct phy_device *phydev)
+{
+       if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID ||
+           phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
+               phy_write(phydev, MDIO_DEVAD_NONE, AR803x_PHY_DEBUG_ADDR_REG,
+                         AR803x_DEBUG_REG_5);
+               phy_write(phydev, MDIO_DEVAD_NONE, AR803x_PHY_DEBUG_DATA_REG,
+                         AR803x_RGMII_TX_CLK_DLY);
+       }
+
+       if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID ||
+           phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
+               phy_write(phydev, MDIO_DEVAD_NONE, AR803x_PHY_DEBUG_ADDR_REG,
+                         AR803x_DEBUG_REG_0);
+               phy_write(phydev, MDIO_DEVAD_NONE, AR803x_PHY_DEBUG_DATA_REG,
+                         AR803x_RGMII_RX_CLK_DLY);
+       }
+
+       phydev->supported = phydev->drv->features;
+
+       genphy_config_aneg(phydev);
+       genphy_restart_aneg(phydev);
+
+       return 0;
+}
+


When I checked the NXP u-boot codebase (git://git.freescale.com/imx/uboot-imx.git, branch l5.1.1_2.1.0-ga), It seems NXP worked with the PHY vendors and set the reserved bits to 0x3D47.

commit 9082eeac5de1335d663016668c9b89c290f5c79b
Author: Andy Fleming <afleming@freescale.com>
Date: Thu Apr 7 21:56:05 2011 -0500
phylib: Add a bunch of PHY drivers from tsec
The tsec driver had a bunch of PHY drivers already written. This
converts them all into PHY Lib drivers, and serves as the first
set of PHY drivers for PHY Lib.
While doing that, cleaned up a number of magic numbers (though
not all of them, as PHY vendors like to keep their numbers as
magical as possible). Also, noticed that almost all of the
vitesse/cicada PHYs had the same config/parse/startup functions,
so those have been collapsed into one.
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Detlev Zundel <dzu@denx.de>
 
+/*
+ * Atheros PHY drivers
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * author Andy Fleming
+ *
+ */
+#include <phy.h>
+
+static int ar8021_config(struct phy_device *phydev)
+{
+ phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
+ phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x3D47);
+
+ return 0;
+}
+
+struct phy_driver AR8021_driver = {
+ .name = "AR8021",
+ .uid = 0x4dd040,
+ .mask = 0xfffff0,
+ .features = PHY_GBIT_FEATURES,
+ .config = ar8021_config,
+ .startup = genphy_startup,
+ .shutdown = genphy_shutdown,
+};
+
+int phy_atheros_init(void)
+{
+ phy_register(&AR8021_driver);
+
+ return 0;
+}
 
 
commit 626ee1e32eeb4fc89e0f406d6067ed6e71d8302f
Author: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Date: Thu Aug 8 16:33:35 2013 +0800
phylib: update atheros ar803x phy
As AR8031 and AR8033 have same PHY ID 0x4dd074, they use the
common driver. Currently AR8031_driver didn't work for AR8033,
hence updated it to have it work on AR8031/AR8033.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
diff --git a/drivers/net/phy/atheros.c b/drivers/net/phy/atheros.c
index 0f2dfd6..7a1453f 100644
--- a/drivers/net/phy/atheros.c
+++ b/drivers/net/phy/atheros.c
@@ -48,11 +48,11 @@ static struct phy_driver AR8021_driver = {
};
static struct phy_driver AR8031_driver = {
- .name = "AR8031",
+ .name = "AR8031/AR8033",
.uid = 0x4dd074,
.mask = 0xfffff0,
.features = PHY_GBIT_FEATURES,
- .config = genphy_config,
+ .config = ar8021_config,
.startup = genphy_startup,
.shutdown = genphy_shutdown,
};

