Ethernet 100% packet loss

Hi,

I tried to use AM335x ethernet interface at 10Mbit/s.

My board have two DP83848 phy.

1-So i configured my kernel with the following options :

CONFIG_NETWORK_PHY_TIMESTAMPING=y

CONFIG_PPS=y

CONFIG_PTP_1588_CLOCK=y

CONFIG_DP83640_PHY=y

2- I modified file source linux-04.06.00.06/drivers/net/ethernet/ti/cpsw.c in function cpsw_set_phy_config

phy->supported &= ~(ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full | ADVERTISED_1000baseT_Half |\
SUPPORTED_Autoneg );

val = miibus->read(miibus, phy_addr, MII_BMCR);

val &= ~BMCR_ANENABLE;
val &= ~BMCR_ANRESTART ;
val |= BMCR_FULLDPLX ;
miibus->write(miibus, phy_addr, MII_BMCR, val);
tmp = miibus->read(miibus, phy_addr, MII_BMCR);

3- i add theses following in my board init source :

#define DP83640_PHY_ID 0x20005c90
#define DP83640_PHY_MASK 0xfffffff9

static int ctp_phy_fixup(struct phy_device *phydev)
{
phydev->supported |= (SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full);
phydev->supported &= ~(SUPPORTED_100baseT_Half |
SUPPORTED_100baseT_Full);
return 0;
}

phy_register_fixup_for_uid(DP83640_PHY_ID, DP83640_PHY_MASK,
ctp_phy_fixup));

4- During kernel boot sequence, DP83848  phy is detected :

[ 7.119280] master PTP_STS 0x0100
[ 7.122725] master PTP_ESTS 0x083e
[ 7.126884] slave PTP_STS 0x0100
[ 7.130524] slave PTP_ESTS 0x003f
[ 7.134556] slave offset 0 nanoseconds
[ 7.139695] davinci_mdio.0: probed
[ 7.143260] davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver NatSemi DP83640
[ 7.151343] davinci_mdio davinci_mdio.0: phy[2]: device 0:02, driver NatSemi DP83640

5- Eth0 is configured in 10Mbit/s :

[   22.631868] PHY: 0:01 - Link is Up - 10/Full

Issue:

But when i tried to obtain an IP adress by dhcp, nothing appens

#dhclient eth0

[...]

PING 192.9.201.30 (192.9.201.30) 56(84) bytes of data.

--- 192.9.201.30 ping statistics ---
1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms

When i set an ip adress manuelly :

#ifconfig eth0 ipadress

I can't ping this Ipadress with a other computer.

The command ethtool give me theses informations:

# ethtool eth0
Settings for eth0:
Current message level: 0x00000000 (0)
Link detected: yes

Questions : Have you any suggestions about my issue? Does i need to add something ?

Best regards