DESK-MX6-L/Pheripherals/Ethernet
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Contents
Peripheral Ethernet[edit | edit source]
The ethernet interface is made available through the i.MX6 fec interface which should be initialized on the device tree.
Device tree configuration[edit | edit source]
Here below an example of device tree configuration used on standard DAVE's kit for the AXEL Lite SOM:
From imx6qdl-axelcommon.dtsi :
&fec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet_axel>;
phy-mode = "rgmii";
phy-handle = <ðphy>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy: ethernet-phy@7 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <7>;
};
};
};
&iomuxc {
...
...
enet {
pinctrl_enet_axel: enetgrp-1 {
fsl,pins = <
MX6QDL_PAD_ENET_MDIO__ENET_MDIO 0x1b0b0
MX6QDL_PAD_ENET_MDC__ENET_MDC 0x1b0b0
MX6QDL_PAD_RGMII_TXC__RGMII_TXC 0x1b0b0
MX6QDL_PAD_RGMII_TD0__RGMII_TD0 0x1b0b0
MX6QDL_PAD_RGMII_TD1__RGMII_TD1 0x1b0b0
MX6QDL_PAD_RGMII_TD2__RGMII_TD2 0x1b0b0
MX6QDL_PAD_RGMII_TD3__RGMII_TD3 0x1b0b0
MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL 0x1b0b0
MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK 0x1b0b0
MX6QDL_PAD_RGMII_RXC__RGMII_RXC 0x1b0b0
MX6QDL_PAD_RGMII_RD0__RGMII_RD0 0x1b0b0
MX6QDL_PAD_RGMII_RD1__RGMII_RD1 0x1b0b0
MX6QDL_PAD_RGMII_RD2__RGMII_RD2 0x1b0b0
MX6QDL_PAD_RGMII_RD3__RGMII_RD3 0x1b0b0
MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL 0x1b0b0
MX6QDL_PAD_ENET_TX_EN__GPIO1_IO28 0xb0b1
MX6QDL_PAD_SD4_DAT3__GPIO2_IO11 0xb0b1
MX6QDL_PAD_SD4_DAT2__GPIO2_IO10 0xb0b1
>;
};
};
...
...
};
Accessing the peripheral[edit | edit source]
AXEL LITE SOM provides the network interface mapped at eth0.
Linux messages at boot time[edit | edit source]
... ... [ 2.373438] fec 2188000.ethernet: 2188000.ethernet supply phy not found, using dummy regulator [ 2.393396] fec 2188000.ethernet eth0: registered PHC device 0 ... ... [ 5.235075] Micrel KSZ9031 Gigabit PHY 2188000.ethernet-1:07: attached PHY driver [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=2188000.ethernet-1:07, irq=POLL) [ 5.249686] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Cable connection:
... ... [ 7.364256] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx [ 7.383799] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 7.417007] device=eth0, hwaddr=fa:2a:07:88:45:42, ipaddr=192.168.0.90, mask=255.255.255.0, gw=255.255.255.255
Check the interface with ifconfig[edit | edit source]
root@imx6qdlxelk:~# ifconfig eth0
eth0 Link encap:Ethernet HWaddr fa:2a:07:88:45:42
inet addr:192.168.0.90 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::f82a:7ff:fe88:4542/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:126363 errors:0 dropped:0 overruns:0 frame:0
TX packets:64259 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:103276957 (98.4 MiB) TX bytes:19090409 (18.2 MiB)
root@imx6qdlxelk:~#
Test with iperf[edit | edit source]
root@imx6qdlxelk:~# iperf3 -t 5 -c 192.168.0.125 Connecting to host 192.168.0.125, port 5201 [ 5] local 192.168.0.90 port 45808 connected to 192.168.0.125 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 11.5 MBytes 96.4 Mbits/sec 0 156 KBytes [ 5] 1.00-2.00 sec 11.2 MBytes 93.8 Mbits/sec 0 191 KBytes [ 5] 2.00-3.00 sec 11.2 MBytes 93.8 Mbits/sec 0 212 KBytes [ 5] 3.00-4.00 sec 11.2 MBytes 93.8 Mbits/sec 0 212 KBytes [ 5] 4.00-5.00 sec 11.3 MBytes 94.9 Mbits/sec 0 242 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-5.00 sec 56.4 MBytes 94.6 Mbits/sec 0 sender [ 5] 0.00-5.00 sec 55.7 MBytes 93.5 Mbits/sec receiver iperf Done. root@imx6qdlxelk:~#
