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DART-6UL Ethernet

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DART-6UL - Ethernet


1 Testing

There are two 100MB/s ports on the kit, eth0 & eth1.

On Host:

$ ifconfig   (to get the IP address)
$ iperf3 -s

On Client:

$ iperf3 -c <IP_ADDRESS_OF_IPERF_SERVER> -u -b 100M

2 Using only one Ethernet port

Apply the following patch to the Linux kernel source, for removing the second Ethernet port, in case your own custom carrier board only has one and doesn't have the second Ethernet phy:

diff --git a/arch/arm/boot/dts/imx6ul-imx6ull-var-dart-common.dtsi b/arch/arm/boot/dts/imx6ul-imx6ull-var-dart-common.dtsi
index f79a356..032ed00 100644
--- a/arch/arm/boot/dts/imx6ul-imx6ull-var-dart-common.dtsi
+++ b/arch/arm/boot/dts/imx6ul-imx6ull-var-dart-common.dtsi
@@ -159,17 +159,6 @@
 	phy-reset-on-resume;
 	phy-handle = <&ethphy0>;
 	status = "okay";
-};
-
-&fec2 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_enet2>;
-	phy-mode = "rmii";
-	phy-handle = <&ethphy1>;
-	phy-reset-gpios=<&gpio1 10 1>;
-	phy-reset-duration=<100>;
-	phy-reset-on-resume;
-	status = "okay";
 	mdio {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -181,14 +170,6 @@
 			clock-names = "rmii-ref";
 			reg = <1>;
 		};
-
-		ethphy1: ethernet-phy@3 {
-			compatible = "ethernet-phy-ieee802.3-c22";
-			micrel,rmii-reference-clock-select-25-mhz;
-			clocks = <&rmii_ref_clk>;
-			clock-names = "rmii-ref";
-			reg = <3>;
-		};
 	};
 };
 
@@ -460,8 +441,8 @@
 			fsl,pins = <
 				MX6UL_PAD_CSI_HSYNC__GPIO4_IO20		0x1b0b0	/* User LED */
 				MX6UL_PAD_GPIO1_IO00__GPIO1_IO00	0x17059	/* User Button */
-				MX6UL_PAD_GPIO1_IO07__ENET2_MDC		0x1b0b0
-				MX6UL_PAD_GPIO1_IO06__ENET2_MDIO	0x1b0b0
+				MX6UL_PAD_GPIO1_IO07__ENET1_MDC		0x1b0b0
+				MX6UL_PAD_GPIO1_IO06__ENET1_MDIO	0x1b0b0
 #ifdef WIFI
 				MX6UL_PAD_GPIO1_IO03__REF_CLK_32K	0x03029	/* WLAN Slow Clock */
 #endif
@@ -481,20 +462,6 @@
 			>;
 		};
 
-		pinctrl_enet2: enet2grp {
-			fsl,pins = <
-				MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN	0x1b0b0
-				MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER	0x1b0b0
-				MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00	0x1b0b0
-				MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01	0x1b0b0
-				MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN	0x1b0b0
-				MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00	0x1b0b0
-				MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01	0x1b0b0
-				MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2	0x4001b031
-				MX6UL_PAD_JTAG_MOD__GPIO1_IO10		0x1b0b0
-			>;
-		};
-
 		pinctrl_flexcan1: flexcan1grp{
 			fsl,pins = <
 				MX6UL_PAD_LCD_DATA09__FLEXCAN1_RX	0x1b020

Notes:
- You can follow the "Build Linux from source code" guide to get the Linux kernel source, apply the above patch, build only the device trees and copy them to your SD card.
- In older kernel releases where there is no imx6ul-imx6ull-var-dart-common.dtsi file, the relevant file to edit is called imx6ul-var-dart.dtsi