arm64: tegra: Add Tegra194 chip device tree

Add the chip-level device tree, including binding headers, for the
NVIDIA Tegra194 "Xavier" system-on-chip. Only a small subset of devices
are initially available, enough to boot to UART console.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

include/dt-bindings/gpio/tegra194-gpio.h

@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. */
+
+/*
+ * This header provides constants for binding nvidia,tegra194-gpio*.
+ *
+ * The first cell in Tegra's GPIO specifier is the GPIO ID. The macros below
+ * provide names for this.
+ *
+ * The second cell contains standard flag values specified in gpio.h.
+ */
+
+#ifndef _DT_BINDINGS_GPIO_TEGRA194_GPIO_H
+#define _DT_BINDINGS_GPIO_TEGRA194_GPIO_H
+
+#include <dt-bindings/gpio/gpio.h>
+
+/* GPIOs implemented by main GPIO controller */
+#define TEGRA194_MAIN_GPIO_PORT_A 0
+#define TEGRA194_MAIN_GPIO_PORT_B 1
+#define TEGRA194_MAIN_GPIO_PORT_C 2
+#define TEGRA194_MAIN_GPIO_PORT_D 3
+#define TEGRA194_MAIN_GPIO_PORT_E 4
+#define TEGRA194_MAIN_GPIO_PORT_F 5
+#define TEGRA194_MAIN_GPIO_PORT_G 6
+#define TEGRA194_MAIN_GPIO_PORT_H 7
+#define TEGRA194_MAIN_GPIO_PORT_I 8
+#define TEGRA194_MAIN_GPIO_PORT_J 9
+#define TEGRA194_MAIN_GPIO_PORT_K 10
+#define TEGRA194_MAIN_GPIO_PORT_L 11
+#define TEGRA194_MAIN_GPIO_PORT_M 12
+#define TEGRA194_MAIN_GPIO_PORT_N 13
+#define TEGRA194_MAIN_GPIO_PORT_O 14
+#define TEGRA194_MAIN_GPIO_PORT_P 15
+#define TEGRA194_MAIN_GPIO_PORT_Q 16
+#define TEGRA194_MAIN_GPIO_PORT_R 17
+#define TEGRA194_MAIN_GPIO_PORT_S 18
+#define TEGRA194_MAIN_GPIO_PORT_T 19
+#define TEGRA194_MAIN_GPIO_PORT_U 20
+#define TEGRA194_MAIN_GPIO_PORT_V 21
+#define TEGRA194_MAIN_GPIO_PORT_W 22
+#define TEGRA194_MAIN_GPIO_PORT_X 23
+#define TEGRA194_MAIN_GPIO_PORT_Y 24
+#define TEGRA194_MAIN_GPIO_PORT_Z 25
+#define TEGRA194_MAIN_GPIO_PORT_FF 26
+#define TEGRA194_MAIN_GPIO_PORT_GG 27
+
+#define TEGRA194_MAIN_GPIO(port, offset) \
+	((TEGRA194_MAIN_GPIO_PORT_##port * 8) + offset)
+
+/* GPIOs implemented by AON GPIO controller */
+#define TEGRA194_AON_GPIO_PORT_AA 0
+#define TEGRA194_AON_GPIO_PORT_BB 1
+#define TEGRA194_AON_GPIO_PORT_CC 2
+#define TEGRA194_AON_GPIO_PORT_DD 3
+#define TEGRA194_AON_GPIO_PORT_EE 4
+
+#define TEGRA194_AON_GPIO(port, offset) \
+	((TEGRA194_AON_GPIO_PORT_##port * 8) + offset)
+
+#endif