arch/arm/dts: Add Turris Omnia device tree

This device tree is taken from mainline Linux kernel commit
7b7db5ab. Added is also a -u-boot.dtsi file with these additions:

  - aliases for I2C and SPI devices are added, because i2cmux and
    SPI flash doesn't work otherwise
  - spi_flash node has been added so that the new DM API works
  - the ATSHA204A node is added in the i2c@5 node
  - "u-boot,dm-pre-reloc"s are added in needed nodes for SPL
    build to work correctly

Signed-off-by: Marek Behun <marek.behun@nic.cz>

 create mode 100644 arch/arm/dts/armada-385-turris-omnia-u-boot.dtsi
 create mode 100644 arch/arm/dts/armada-385-turris-omnia.dts
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/armada-385-turris-omnia-u-boot.dtsi b/arch/arm/dts/armada-385-turris-omnia-u-boot.dtsi
new file mode 100644
index 0000000..22caf35
--- /dev/null
+++ b/arch/arm/dts/armada-385-turris-omnia-u-boot.dtsi
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2017 Marek Behun <marek.behun@nic.cz>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+/ {
+	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2cmux;
+		spi0 = &spi0;
+	};
+};
+
+&i2c0 {
+	u-boot,dm-pre-reloc;
+
+	i2cmux: i2cmux@70 {
+		u-boot,dm-pre-reloc;
+
+		i2c@0 {
+			u-boot,dm-pre-reloc;
+		};
+
+		i2c@1 {
+			u-boot,dm-pre-reloc;
+		};
+
+		i2c@5 {
+			u-boot,dm-pre-reloc;
+
+			/* ATSHA204A at address 0x64 */
+			atsha204a@64 {
+				u-boot,dm-pre-reloc;
+				compatible = "atmel,atsha204a";
+				reg = <0x64>;
+			};
+		};
+	};
+};
+
+&spi0 {
+	u-boot,dm-pre-reloc;
+
+	spi-flash@0 {
+		compatible = "spi-flash";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+};