DESK-MX6-L/Pheripherals/Ethernet
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| 2.0.0 | Feb 2022 | DESK 3.0.0 release | |
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]
... ... [ 3.915846] fec 2188000.ethernet eth0: registered PHC device 0 ... ... [ 14.798116] 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) ... ...
Cable connection:
... ... [ 12.850105] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx ... ...
Check the interface with ifconfig[edit | edit source]
root@desk-mx6:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.4.39 netmask 255.255.255.0 broadcast 192.168.4.255
inet6 fe80::e4ec:efff:fe76:fcf7 prefixlen 64 scopeid 0x20<link>
ether e6:ec:ef:76:fc:f7 txqueuelen 1000 (Ethernet)
RX packets 3588 bytes 762212 (744.3 KiB)
RX errors 0 dropped 1070 overruns 0 frame 0
TX packets 217 bytes 51775 (50.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Test with iperf[edit | edit source]
root@desk-mx6:~# iperf3 -t 5 -c 192.168.4.47 Connecting to host 192.168.4.47, port 5201 [ 5] local 192.168.4.39 port 42232 connected to 192.168.4.47 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 11.4 MBytes 95.2 Mbits/sec 0 132 KBytes [ 5] 1.00-2.00 sec 11.1 MBytes 92.8 Mbits/sec 0 146 KBytes [ 5] 2.00-3.00 sec 11.0 MBytes 92.3 Mbits/sec 0 146 KBytes [ 5] 3.00-4.00 sec 11.0 MBytes 92.3 Mbits/sec 0 146 KBytes [ 5] 4.00-5.00 sec 11.1 MBytes 92.8 Mbits/sec 0 153 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-5.00 sec 55.5 MBytes 93.1 Mbits/sec 0 sender [ 5] 0.00-5.01 sec 55.2 MBytes 92.4 Mbits/sec receiver iperf Done.
