board: gateworks: imx8mm: Add Gateworks Venice board support

Add initial support for Gateworks Venice product family based on the
i.MX 8M Mini SoC

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/arch/arm/dts/imx8mm-venice-gw700x-u-boot.dtsi b/arch/arm/dts/imx8mm-venice-gw700x-u-boot.dtsi
new file mode 100644
index 0000000..a4487e2
--- /dev/null
+++ b/arch/arm/dts/imx8mm-venice-gw700x-u-boot.dtsi
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Gateworks Corporation
+ */
+
+&{/soc@0} {
+	u-boot,dm-pre-reloc;
+	u-boot,dm-spl;
+};
+
+&clk {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+	/delete-property/ assigned-clocks;
+	/delete-property/ assigned-clock-parents;
+	/delete-property/ assigned-clock-rates;
+};
+
+&osc_24m {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&aips1 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&aips2 {
+	u-boot,dm-spl;
+};
+
+&aips3 {
+	u-boot,dm-spl;
+};
+
+&iomuxc {
+	u-boot,dm-spl;
+};
+
+&gpio1 {
+	u-boot,dm-spl;
+};
+
+&gpio2 {
+	u-boot,dm-spl;
+};
+
+&gpio3 {
+	u-boot,dm-spl;
+};
+
+&gpio4 {
+	u-boot,dm-spl;
+};
+
+&gpio5 {
+	u-boot,dm-spl;
+};
+
+&uart2 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_uart2 {
+	u-boot,dm-spl;
+};
+
+&usdhc3 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc3 {
+	u-boot,dm-spl;
+};
+
+&i2c1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_i2c1 {
+	u-boot,dm-spl;
+};
+
+&i2c2 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_i2c2 {
+	u-boot,dm-spl;
+};
+
+&fec1 {
+	phy-reset-gpios = <&gpio3 0 GPIO_ACTIVE_LOW>;
+	phy-reset-duration = <1>;
+	phy-reset-post-delay = <1>;
+};
+
+&{/soc@0/bus@30800000/i2c@30a20000/pmic@69} {
+	u-boot,dm-spl;
+};
+
+&{/soc@0/bus@30800000/i2c@30a20000/pmic@69/regulators} {
+	u-boot,dm-spl;
+};