DESK-XZ7-L/Peripherals/Ethernet

History
Issue Date	Notes
2023/01/23	DESK-XZ7-L-1.0.1 release

Peripheral Ethernet

The ethernet interface 0 is made available through the gec0 interface, this interface should be initialized on the device tree.

Device tree configuration

This configuration work for Bora, Boralite and BoraX platforms.

Here below an example of device tree configuration used on standard DAVE's kit for the Bora, Boralite and Bora for ethernet interface 0:

From bora.dtsi:

&gem0 {

    status = "okay";
    phy-mode = "rgmii-id";
    phy-handle = <&ethernet_phy>;

    ethernet_phy: ethernet-phy@7 {
        reg = <0x07>;
        device_type = "ethernet-phy";

        mdio {
            #address-cells = <1>;
            #size-cells = <0>;

            phy0: phy@7 {
                rxc-skew-ps = <0x744>;
                txc-skew-ps = <0x744>;
                micrel,led-mode = <0x01>;

                compatible = "micrel,ksz9031";
                device_type = "ethernet-phy";
                reg = <0x07>;
            };
        };
    };
};

Linux messages at boot time

• eth0

[    0.588523] macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 37 (00:50:c2:1e:af:e0)
...
[    3.538025] macb e000b000.ethernet eth0: PHY [e000b000.ethernet-ffffffff:07] driver [Micrel KSZ9031 Gigabit PHY] (irq=POLL)
[    3.538044] macb e000b000.ethernet eth0: configuring for phy/rgmii-id link mode

Cable connection:

...
...
[    7.698004] macb e000b000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[    7.698035] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Check the interface with ifconfig

root@bora:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.89  netmask 255.255.255.0  broadcast 0.0.0.0
        inet6 fe80::250:c2ff:fe1e:afe0  prefixlen 64  scopeid 0x20<link>
        ether 00:50:c2:1e:af:e0  txqueuelen 1000  (Ethernet)
        RX packets 1141  bytes 62918 (61.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 45  bytes 4892 (4.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 37  base 0xb000

Test with iperf3

root@bora:~# iperf3 -t 5 -c 192.168.0.167
Connecting to host 192.168.0.167, port 5201
[  5] local 192.168.0.89 port 33028 connected to 192.168.0.167 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  63.0 MBytes   527 Mbits/sec    0    427 KBytes
[  5]   1.00-2.02   sec  88.3 MBytes   727 Mbits/sec    0    655 KBytes
[  5]   2.02-3.01   sec  87.0 MBytes   735 Mbits/sec    1    522 KBytes
[  5]   3.01-4.01   sec  80.5 MBytes   675 Mbits/sec    0    602 KBytes
[  5]   4.01-5.00   sec  76.9 MBytes   651 Mbits/sec    0    636 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-5.00   sec   396 MBytes   663 Mbits/sec    1             sender
[  5]   0.00-5.58   sec   396 MBytes   595 Mbits/sec                  receiver

iperf Done.
root@bora:~#

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