am335x, guardian: Add support for the bosch guardian board

Add support for the Bosch Guardian board.

CPU  : AM335X-GP rev 2.1
Model: Bosch AM335x Guardian
I2C:   ready
DRAM:  256 MiB
NAND:  512 MiB
MMC:   OMAP SD/MMC: 0

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Felix Brack <fb@ltec.ch>
diff --git a/arch/arm/dts/am335x-guardian-u-boot.dtsi b/arch/arm/dts/am335x-guardian-u-boot.dtsi
new file mode 100644
index 0000000..156b9b0
--- /dev/null
+++ b/arch/arm/dts/am335x-guardian-u-boot.dtsi
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 EETS GmbH - https://www.eets.ch/
+ * Copyright (C) 2018 Robert Bosch Power Tools GmbH
+ */
+
+/ {
+	ocp {
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&l4_wkup {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc1 {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc1_pins {
+	u-boot,dm-pre-reloc;
+};
+
+&rtc {
+	clocks = <&l4_per_clkctrl AM3_CLKDIV32K_CLKCTRL 0>;
+	clock-names = "int-clk";
+};
+
+&scm {
+	u-boot,dm-pre-reloc;
+};
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+};
+
+&uart0_pins {
+	u-boot,dm-pre-reloc;
+};
+
+&usb {
+	u-boot,dm-pre-reloc;
+};
+
+&usb_ctrl_mod {
+	u-boot,dm-pre-reloc;
+};
+
+&usb0 {
+	u-boot,dm-pre-reloc;
+};
+
+&usb0_phy {
+	u-boot,dm-pre-reloc;
+};
+
+&am33xx_pinmux {
+	u-boot,dm-pre-reloc;
+
+	lcd0_pins: pinmux_lcd0_pins {
+		pinctrl-single,pins = <
+			AM33XX_IOPAD(0x908, PIN_OUTPUT_PULLUP   | MUX_MODE7)
+		>;
+	};
+};