boards: khadas: adding support for the edge2

added support for the khadas edge2 board

Signed-off-by: Esteban Aguililla Klein <[email protected]>

boards/khadas/edge2/Kconfig.khadas_edge2

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+# Copyright 2024 Université Gustave Eiffel
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_KHADAS_EDGE2
+	select SOC_RK3588S

boards/khadas/edge2/board.yml

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+board:
+  name: khadas_edge2
+  vendor: khadas
+  socs:
+  - name: rk3588s

boards/khadas/edge2/doc/index.rst

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+.. _khadas_edge2:
+
+Khadas Edge2
+#################################
+
+Overview
+********
+
+See <https://www.khadas.com/edge2>
+
+Hardware
+********
+
+See <https://docs.khadas.com/products/sbc/edge2/hardware/start>
+
+Supported Features
+==================
+
+The ``khadas_edge2`` board target supports the following
+hardware features:
+
++-----------+------------+--------------------------------------+
+| Interface | Controller | Driver/Component                     |
++===========+============+======================================+
+| GIC-600   | on-chip    | GICv3 interrupt controller           |
++-----------+------------+--------------------------------------+
+| ARM TIMER | on-chip    | System Clock                         |
++-----------+------------+--------------------------------------+
+| UART      | on-chip    | Synopsys DesignWare 8250 serial port |
++-----------+------------+--------------------------------------+
+
+Other hardware features have not been enabled yet for this board.
+
+The default configuration can be found in (NON-SMP)
+:zephyr_file:`boards/khadas/edge2/khadas_edge2_defconfig`
+
+There are multiple serial ports on the board: Zephyr is using
+uart2 as serial console.
+
+Programming and Debugging
+*************************
+
+Use the following configuration to run basic Zephyr applications and
+kernel tests on Khadas Edge2 board. For example, with the :ref:`hello_world`:
+
+1. Non-SMP mode
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :host-os: unix
+   :board: khadas_edge2
+   :goals: build
+
+This will build an image with the hello world sample app.
+
+Build the zephyr image:
+
+.. code-block:: console
+
+	mkimage -C none -A arm64 -O linux -a 0x10000000 -e 0x10000000 -d build/zephyr/zephyr.bin build/zephyr/zephyr.img
+
+Burn the image on the board (we choose to use Rockchip burning tool [rkdeveloptool](https://github.com/rockchip-linux/rkdeveloptool.git)), you will need a [SPL](http://dl.khadas.com/products/edge2/firmware/boot/) which is provided by khadas:
+
+.. code-block:: console
+
+   rkdeveloptool db rk3588_spl_loader_*; rkdeveloptool wl 0x100000 zephyr.img; rkdeveloptool rd
+
+The sector 0x100000 was chosen arbitrarily (far away from U-Boot image)
+
+Use U-Boot to load and run Zephyr:
+
+.. code-block:: console
+
+	mmc read ${pxefile_addr_r} 0x100000 0x1000; bootm start ${pxefile_addr_r}; bootm loados; bootm go
+
+0x1000 is the size (in number of sectors) or your image. Increase it if needed.
+
+It will display the following console output:
+
+.. code-block:: console
+
+	*** Booting Zephyr OS build XXXXXXXXXXXX  ***
+	Hello World! khadas_edge2
+
+Flashing
+========
+
+Zephyr image can be loaded in DDR memory at address 0x10000000 from SD Card,
+EMMC, QSPI Flash or downloaded from network in uboot.
+
+References
+==========
+
+`Documentation: <https://docs.khadas.com/linux/edge/>`_

boards/khadas/edge2/khadas_edge2.dts

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+/*
+ * Copyright 2024 Université Gustave Eiffel
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <rockchip/rk3588s.dtsi>
+
+/ {
+	model = "Khadas Edge2";
+	compatible = "khadas,edge2";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,console = &uart2;
+		zephyr,shell-uart = &uart2;
+	};
+
+	cpus {
+		/delete-node/ cpu@1;
+		/delete-node/ cpu@2;
+		/delete-node/ cpu@3;
+		/delete-node/ cpu@4;
+		/delete-node/ cpu@5;
+		/delete-node/ cpu@6;
+		/delete-node/ cpu@7;
+	};
+};
+
+&uart2 {
+	status = "okay";
+};

boards/khadas/edge2/khadas_edge2.yaml

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+identifier: khadas_edge2
+name: Khadas Edge2 (single core, non SMP)
+type: mcu
+arch: arm64
+toolchain:
+  - zephyr
+  - cross-compile
+ram: 8192
+vendor: khadas

boards/khadas/edge2/khadas_edge2_defconfig

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+# Copyright 2024 Université Gustave Eiffel
+# SPDX-License-Identifier: Apache-2.0
+
+# Platform Configuration
+CONFIG_ARM64_VA_BITS_40=y
+CONFIG_ARM64_PA_BITS_40=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=24000000
+CONFIG_CACHE_MANAGEMENT=y
+CONFIG_ARMV8_A_NS=y
+
+# Serial Drivers
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Enable Console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y