ARM: tegra: add p2771-0000 board support

P2771-0000 is a P3310 CPU board married to a P2597 I/O board. The
combination contains SoC, DRAM, eMMC, SD card slot, HDMI, USB micro-B
port, Ethernet, USB3 host port, SATA, PCIe, and two GPIO expansion
headers.

Currently, due to U-Boot's level of support for Tegra186, the only
features supported by U-Boot are the console UART and the on-board eMMC.
Additional features will be added over time.

U-Boot has so far been tested by replacing the kernel image on the device
with a U-Boot binary. It is anticipated that U-Boot will eventually
replace the CCPLEX bootloader binary, as on previous chips. This hasn't
yet been tested.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/dts/Makefile

@@ -47,6 +47,7 @@ dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 	tegra124-jetson-tk1.dtb \
 	tegra124-nyan-big.dtb \
 	tegra124-venice2.dtb \
+	tegra186-p2771-0000.dtb \
 	tegra210-e2220-1170.dtb \
 	tegra210-p2371-0000.dtb \
 	tegra210-p2371-2180.dtb \

arch/arm/dts/tegra186-p2771-0000.dts

@@ -0,0 +1,25 @@
+/dts-v1/;
+
+#include "tegra186.dtsi"
+
+/ {
+	model = "NVIDIA P2771-0000";
+	compatible = "nvidia,p2771-0000", "nvidia,tegra186";
+
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		sdhci0 = "/sdhci@3460000";
+	};
+
+	memory {
+		reg = <0x0 0x80000000 0x0 0x60000000>;
+	};
+
+	sdhci@3460000 {
+		status = "okay";
+		bus-width = <8>;
+	};
+};

arch/arm/mach-tegra/tegra186/Kconfig

@@ -7,9 +7,19 @@ if TEGRA186
 choice
 	prompt "Tegra186 board select"
 
+config TARGET_P2771_0000
+	bool "NVIDIA Tegra186 P2771-0000 board"
+	help
+	  P2771-0000 is a P3310 CPU board married to a P2597 I/O board. The
+	  combination contains SoC, DRAM, eMMC, SD card slot, HDMI, USB
+	  micro-B port, Ethernet, USB3 host port, SATA, PCIe, and two GPIO
+	  expansion headers.
+
 endchoice
 
 config SYS_SOC
 	default "tegra186"
 
+source "board/nvidia/p2771-0000/Kconfig"
+
 endif