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| 2023/05/04 | DESK-MX6UL-L 4.0.0 release | ||
Contents
Peripheral EthernetEdit
The ethernet interface is made available through the i.MX6UL fec interface which should be initialized on the device tree.
Device tree configurationEdit
Here below an example of device tree configuration used on standard DAVE's kit for the AXEL ULite SOM:
From imx6ul-axelulite.dtsi:
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet1>;
phy-mode = "rmii";
phy-handle = <&\ethphy0>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@3 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <3>;
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET_REF>;
clock-names = "rmii-ref";
};
};
};
...
...
&iomuxc {
...
...
pinctrl_enet1: enet1grp {
fsl,pins = <
MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN 0x1b0b0
MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 0x4001b0a8
MX6UL_PAD_GPIO1_IO07__ENET1_MDC 0x1b0b0
MX6UL_PAD_GPIO1_IO06__ENET1_MDIO 0x1b0b0
MX6UL_PAD_SNVS_TAMPER1__GPIO5_IO01 0x1b0b0 /* ETH_PHY_RST */
MX6UL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x1b0b0 /* ETH_INT */
>;
};
...
...
};
Accessing the peripheralEdit
AXEL ULite SOM provides the primary network interface mapped at eth0.
Linux messages at boot timeEdit
... ... [ 1.771162] fec 2188000.ethernet eth0: registered PHC device 0 [ 23.370105] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx ... ... [ 20.262485] Micrel KSZ8081 or KSZ8091 2188000.ethernet-1:03: attached PHY driver (mii_bus:phy_addr=2188000.ethernet-1:03, irq=POLL) ... ...
Cable connection:
... ... [ 93.046409] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx ... ...
Check the interface with ifconfigEdit
root@desk-mx6ul-axelulite:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.4.159 netmask 255.255.255.0 broadcast 192.168.4.255
inet6 fe80::bc0a:b6ff:fe9b:b0f8 prefixlen 64 scopeid 0x20<link>
ether be:0a:b6:9b:b0:f8 txqueuelen 1000 (Ethernet)
RX packets 331 bytes 36636 (35.7 KiB)
RX errors 0 dropped 47 overruns 0 frame 0
TX packets 77 bytes 11278 (11.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Test with iperfEdit
root@desk-mx6ul-axelulite:~# iperf3 -t 5 -c 192.168.4.47 Connecting to host 192.168.4.47, port 5201 [ 5] local 192.168.4.159 port 56244 connected to 192.168.4.47 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 11.3 MBytes 94.7 Mbits/sec 0 143 KBytes [ 5] 1.00-2.00 sec 10.8 MBytes 90.4 Mbits/sec 0 143 KBytes [ 5] 2.00-3.00 sec 10.8 MBytes 90.1 Mbits/sec 0 150 KBytes [ 5] 3.00-4.00 sec 10.9 MBytes 91.2 Mbits/sec 0 150 KBytes [ 5] 4.00-5.00 sec 10.8 MBytes 90.3 Mbits/sec 0 157 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-5.00 sec 54.4 MBytes 91.3 Mbits/sec 0 sender [ 5] 0.00-5.05 sec 54.1 MBytes 89.9 Mbits/sec receiver iperf Done.