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Network interface
i.MX6UL
contains Dual-Megabit Ethernet Controller. Below you can see how this peripheral is configured for the liteboard.
LAN8720A - PHY device
Liteboard is using external LAN8720A 10BASE-T/100BASE-TX transceiver connected with liteSOM via RMII™ interface. Following signals are required to connect liteSOM with LAN8720A via RMII™:
In addition LAN8720A and liteSOM are connected via SMI signals:
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Device Tree configuration
fec1: ethernet@02188000 { compatible = "fsl,imx6ul-fec", "fsl,imx6q-fec"; reg = <0x02188000 0x4000>; interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>; clocks = <&clks IMX6UL_CLK_ENET>, <&clks IMX6UL_CLK_ENET_AHB>, <&clks IMX6UL_CLK_ENET_PTP>, <&clks IMX6UL_CLK_ENET_REF>, <&clks IMX6UL_CLK_ENET_REF>; clock-names = "ipg", "ahb", "ptp", "enet_clk_ref", "enet_out"; fsl,num-tx-queues=<1>; fsl,num-rx-queues=<1>; status = "disabled"; }; |
Basic configuration for Documentation for this device-tree node you can find in fsl-fec.txt file. |
&fec1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_enet1>; phy-mode = "rmii"; phy-handle = <ðphy0>; status = "okay"; mdio { #address-cells = <1>; #size-cells = <0>; ethphy0: ethernet-phy@0 { reg = <0>; }; }; }; &iomuxc { pinctrl_enet1: enet1grp { fsl,pins = < MX6UL_PAD_GPIO1_IO07__ENET1_MDC 0x1b0b0 MX6UL_PAD_GPIO1_IO06__ENET1_MDIO 0x1b0b0 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 0x4001b031 >; }; }; |
To enable -> Device Drivers -> Network device support -> Ethernet driver support -> Freescale device -> FEC ethernet controller (of ColdFire and some i.MX CPUs) |
Network configuration
Current network status you can verify by ifconfig eth0
command
eth0 Link encap:Ethernet HWaddr 9E:EE:5F:94:B8:D3 inet addr:10.42.0.133 Bcast:10.42.0.255 Mask:255.255.255.0 inet6 addr: fe80::9cee:5fff:fe94:b8d3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:38 errors:0 dropped:0 overruns:0 frame:0 TX packets:15 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5906 (5.7 KiB) TX bytes:1654 (1.6 KiB)
or ip address show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 9e:ee:5f:94:b8:d3 brd ff:ff:ff:ff:ff:ff inet 10.42.0.133/24 brd 10.42.0.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::9cee:5fff:fe94:b8d3/64 scope link valid_lft forever preferred_lft forever