arm64: dts: imx8ulp-evk: Add the fec support

Enable the fec on i.MX8ULP EVK board.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8ulp-evk.dts

@@ -19,6 +19,21 @@ memory@80000000 {
 		device_type = "memory";
 		reg = <0x0 0x80000000 0 0x80000000>;
 	};
+
+	clock_ext_rmii: clock-ext-rmii {
+		compatible = "fixed-clock";
+		clock-frequency = <50000000>;
+		clock-output-names = "ext_rmii_clk";
+		#clock-cells = <0>;
+	};
+
+	clock_ext_ts: clock-ext-ts {
+		compatible = "fixed-clock";
+		/* External ts clock is 50MHZ from PHY on EVK board. */
+		clock-frequency = <50000000>;
+		clock-output-names = "ext_ts_clk";
+		#clock-cells = <0>;
+	};
 };
 
 &lpuart5 {
@@ -38,7 +53,49 @@ &usdhc0 {
 	status = "okay";
 };
 
+&fec {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&pinctrl_enet>;
+	pinctrl-1 = <&pinctrl_enet>;
+	clocks = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>,
+		 <&pcc4 IMX8ULP_CLK_ENET>,
+		 <&cgc1 IMX8ULP_CLK_ENET_TS_SEL>,
+		 <&clock_ext_rmii>;
+	clock-names = "ipg", "ahb", "ptp", "enet_clk_ref";
+	assigned-clocks = <&cgc1 IMX8ULP_CLK_ENET_TS_SEL>;
+	assigned-clock-parents = <&clock_ext_ts>;
+	phy-mode = "rmii";
+	phy-handle = <&ethphy>;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy: ethernet-phy@1 {
+			reg = <1>;
+			micrel,led-mode = <1>;
+		};
+	};
+};
+
 &iomuxc1 {
+	pinctrl_enet: enetgrp {
+		fsl,pins = <
+			MX8ULP_PAD_PTE15__ENET0_MDC     0x43
+			MX8ULP_PAD_PTE14__ENET0_MDIO    0x43
+			MX8ULP_PAD_PTE17__ENET0_RXER    0x43
+			MX8ULP_PAD_PTE18__ENET0_CRS_DV  0x43
+			MX8ULP_PAD_PTF1__ENET0_RXD0     0x43
+			MX8ULP_PAD_PTE20__ENET0_RXD1    0x43
+			MX8ULP_PAD_PTE16__ENET0_TXEN    0x43
+			MX8ULP_PAD_PTE23__ENET0_TXD0    0x43
+			MX8ULP_PAD_PTE22__ENET0_TXD1    0x43
+			MX8ULP_PAD_PTE19__ENET0_REFCLK  0x43
+			MX8ULP_PAD_PTF10__ENET0_1588_CLKIN 0x43
+		>;
+	};
+
 	pinctrl_lpuart5: lpuart5grp {
 		fsl,pins = <
 			MX8ULP_PAD_PTF14__LPUART5_TX	0x3