arm64: tegra: Add support for NVIDIA Shield TV

Add initial device-tree support for NVIDIA Shield TV (a.k.a. Darcy)
based upon Tegra210 SoC with 3 GiB of LPDDR4 RAM.
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/Makefile

@@ -4,5 +4,6 @@ dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-0000.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-2180.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2571.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-smaug.dtb
+dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2894-0050-a08.dtb
 dtb-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186-p2771-0000.dtb
 dtb-$(CONFIG_ARCH_TEGRA_194_SOC) += tegra194-p2972-0000.dtb

arch/arm64/boot/dts/nvidia/tegra210-p2894-0050-a08.dts

+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "tegra210-p2894.dtsi"
+
+/ {
+	model = "NVIDIA Shield TV";
+	compatible = "nvidia,p2894-0050-a08", "nvidia,darcy", "nvidia,tegra210";
+};

arch/arm64/boot/dts/nvidia/tegra210-p2894.dtsi

+// SPDX-License-Identifier: GPL-2.0
+
+#include "tegra210.dtsi"
+
+/ {
+	aliases {
+		serial0 = &uarta;
+	};
+
+	chosen {
+		bootargs = "earlycon";
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0xc0000000>;
+	};
+
+	serial@70006000 {
+		status = "okay";
+	};
+
+	pmc@7000e400 {
+		nvidia,invert-interrupt;
+		nvidia,suspend-mode = <0>;
+		nvidia,cpu-pwr-good-time = <0>;
+		nvidia,cpu-pwr-off-time = <0>;
+		nvidia,core-pwr-good-time = <4587 3876>;
+		nvidia,core-pwr-off-time = <39065>;
+		nvidia,core-power-req-active-high;
+		nvidia,sys-clock-req-active-high;
+		status = "okay";
+	};
+
+	sdhci@700b0600 {
+		bus-width = <8>;
+		non-removable;
+		status = "okay";
+	};
+
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock@0 {
+			compatible = "fixed-clock";
+			reg = <0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
+	cpus {
+		cpu@0 {
+			enable-method = "psci";
+		};
+
+		cpu@1 {
+			enable-method = "psci";
+		};
+
+		cpu@2 {
+			enable-method = "psci";
+		};
+
+		cpu@3 {
+			enable-method = "psci";
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+};