boards: add hpmicro hpm6750evkmini board

This is an risc-v board. we also add hpmicro SoC support,
as well as gpio, pinctrl, uart driver.

Signed-off-by: Weiwei Guo <[email protected]>

boards/riscv/hpm6750evkmini/Kconfig.board

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+# Copyright (c) 2022 HPMicro
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_HPM6750EVKMINI
+	bool "HPMicro HPM6750EVKMINI"
+	depends on SOC_HPM6750

boards/riscv/hpm6750evkmini/Kconfig.defconfig

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+# Copyright (c) 2022 HPMicro
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_HPM6750EVKMINI
+
+DT_CHOSEN_Z_CODE_PARTITION := zephyr,code-partition
+
+config BOARD
+	default "hpm6750evkmini"
+
+config FLASH_LOAD_OFFSET
+	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_CODE_PARTITION))
+
+config FLASH_LOAD_SIZE
+	default $(dt_chosen_reg_size_hex,$(DT_CHOSEN_Z_CODE_PARTITION))
+
+endif # BOARD_HPM6750EVKMINI

boards/riscv/hpm6750evkmini/board.cmake

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+# SPDX-License-Identifier: Apache-2.0
+
+if(NOT CONFIG_XIP)
+board_runner_args(openocd "--use-elf")
+endif()
+board_runner_args(openocd "--config=${BOARD_DIR}/support/probes/ft2232.cfg"
+                                    "--config=${BOARD_DIR}/support/soc/hpm6750-single-core.cfg"
+                                "--config=${BOARD_DIR}/support/boards/hpm6750evkmini.cfg")
+board_runner_args(openocd --target-handle=_CHIPNAME.cpu0)
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/riscv/hpm6750evkmini/doc/index.rst

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+.. _hpm6750evkmini:
+
+HPMicro HPM6750EVKMINI
+######################
+
+Overview
+********
+
+The HPM6750 is a dual-core flashless MCU running 816Mhz.
+It has a 2MB continuous on-chip ram.
+Also, it provides various memory interfaces, including SDRAM, Quad SPI NOR Flash, SD/eMMC.
+
+The figure shows the HPM6750EVKMINI board.
+
+.. image:: img/hpm6750evkmini.png
+     :align: center
+     :alt: HPM6750EVKMINI
+
+Hardware
+********
+
+The HPM6750EVKMINI platform integrates 2 cores 32-bit 816MHz RISC-V CPUs, DSP,
+2MB RAM, Cache, SPI flash memory, ethernet controller and other peripherals.
+
+- HPM6750IVM MCU (816Mhz, 2MB OCRAM)
+- Onboard Memory
+  - 128Mb SDRAM
+  - 64Mb Quad SPI NOR Flash
+- Display & Camera
+  - LCD connector
+  - Camera (DVP)
+- WiFi
+  - RW007 over SPI
+- USB
+  - USB type C (USB 2.0 OTG) connector x2
+- Audio
+  - Mic
+  - DAO
+- Others
+  - TF Slot
+  - FT2232
+  - Beeper
+  - RGB LED
+- Expansion port
+  - ART-PI extension port
+
+For more information about the HPMICRO SoC and HPM6750EVKMINI board:
+
+- `HPMICRO Design Resources`_
+
+Serial Port
+===========
+
+The HPM6750EVKMINI platform has 2 UARTs.
+The Zephyr console output is by default assigned to UART0 and the default
+settings are 115200 8N1.
+
+Programming and debugging
+*************************
+
+Building
+========
+
+You can build applications in the usual way. Here is an example for
+the :ref:`hello_world` application.
+
+.. zephyr-app-commands::
+   :board: hpm6750evkmini
+   :zephyr-app: samples/hello_world
+   :goals: build
+
+Flashing
+========
+
+If you want to use XIP mode (``CONFIG_XIP=y``).
+If ``CONFIG_XIP=n``, you can load the program into RAM directly
+and execute it.
+
+.. zephyr-app-commands::
+   :board: hpm6750evkmini
+   :zephyr-app: samples/hello_world
+   :goals: flash
+
+Open a serial terminal with the following settings:
+
+- Speed: 115200
+- Data: 8 bits
+- Parity: None
+- Stop bits: 1
+
+you should see the following message in the terminal:
+
+.. code-block:: console
+
+   Hello World! hpm6750evkmini
+
+Debugging
+=========
+
+.. zephyr-app-commands::
+   :board: hpm6750evkmini
+   :zephyr-app: samples/hello_world
+   :goals: debug
+
+References
+==========
+
+.. _HPMICRO Design Resources:
+   http://www.hpmicro.com/resources/resources.html

boards/riscv/hpm6750evkmini/hpm6750evkmini-pinctrl.dtsi

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+/*
+ * Copyright (c) 2022 HPMicro
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <zephyr/dt-bindings/pinctrl/hpmicro-pinctrl-common.h>
+&pinctrl {
+	pinmux_uart0: pinmux_uart0 {
+		group0 {
+			pinmux =
+			<HPMICRO_PINMUX(HPMICRO_PORTY, 7, IOC_TYPE_IOC, 0, 2)>,
+			<HPMICRO_PINMUX(HPMICRO_PORTY, 6, IOC_TYPE_IOC, 0, 2)>,
+			<HPMICRO_PINMUX(HPMICRO_PORTY, 7, IOC_TYPE_PIOC, 0, 3)>,
+			<HPMICRO_PINMUX(HPMICRO_PORTY, 6, IOC_TYPE_PIOC, 0, 3)>;
+			drive-strength = "r000";
+			power-source = "3v3";
+		};
+	};
+	pinmux_gpiob: pinmux_gpiob {
+		group0 {
+			pinmux =
+			<HPMICRO_PINMUX(HPMICRO_PORTB, 18, IOC_TYPE_IOC, 0, 0)>,
+			<HPMICRO_PINMUX(HPMICRO_PORTB, 19, IOC_TYPE_IOC, 0, 0)>,
+			<HPMICRO_PINMUX(HPMICRO_PORTB, 20, IOC_TYPE_IOC, 0, 0)>;
+			bias-pull-down;
+			drive-strength = "r000";
+			power-source = "3v3";
+		};
+	};
+};

boards/riscv/hpm6750evkmini/hpm6750evkmini.dts

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+/*
+ * Copyright (c) 2022 HPMicro
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <hpmicro/hpm6750.dtsi>
+#include "hpm6750evkmini-pinctrl.dtsi"
+
+/ {
+	model = "HPMicro HPM6750EVKMINI";
+	compatible = "HPMicro,hpm6750evkmini";
+
+	chosen {
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,sram = &sram;
+		zephyr,itcm = &ilm;
+		zephyr,dtcm = &dlm;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	dram: memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 DT_SIZE_M(16)>;
+	};
+
+	aliases {
+		led0 = &led_r;
+		led1 = &led_g;
+		led2 = &led_b;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led_r: led_r {
+			gpios = <&gpiob 19 GPIO_ACTIVE_LOW>;
+			label = "LEDR";
+		};
+		led_g: led_g {
+			gpios = <&gpiob 18 GPIO_ACTIVE_LOW>;
+			label = "LEDG";
+		};
+		led_b: led_b {
+			gpios = <&gpiob 20 GPIO_ACTIVE_LOW>;
+			label = "LEDB";
+		};
+	};
+};
+
+&gpio0 {
+
+	gpiob: gpio@1 {
+		compatible = "hpmicro,hpm-gpio";
+		reg = <0x0 0x4000>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		hpmicro-gpio-port = <1>;
+		interrupts = <2 1>;
+		interrupt-parent = <&plic0>;
+	};
+
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&pinmux_uart0>;
+	pinctrl-names = "default";
+};
+&gpiob {
+	pinctrl-0 = <&pinmux_gpiob>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+&flash0 {
+	status = "okay";
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 0x3000>;
+		};
+
+		slot0_partition: partition@3000 {
+			label = "image-0";
+			reg = <0x3000 DT_SIZE_M(4)>;
+		};
+	};
+};

boards/riscv/hpm6750evkmini/hpm6750evkmini.yaml

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+# Copyright (c) 2022 HPMicro
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: hpm6750evkmini
+name: HPMicro HPM6750EVKMINI
+type: mcu
+arch: riscv32
+toolchain:
+  - zephyr
+  - cross-compile
+ram: 2048
+supported:
+  - gpio
+  - uart
+testing:
+  ignore_tags:
+    - bluetooth
+vendor: hpmicro

boards/riscv/hpm6750evkmini/hpm6750evkmini_defconfig

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+CONFIG_SOC_SERIES_HPMICRO=y
+CONFIG_SOC_HPM6750=y
+CONFIG_BOARD_HPM6750EVKMINI=y
+CONFIG_XIP=n
+CONFIG_PLIC=y
+CONFIG_RISCV_MACHINE_TIMER=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+CONFIG_PINCTRL=y
+CONFIG_BUILD_OUTPUT_HEX=y
+CONFIG_CLOCK_CONTROL=y
+
+# Serial driver options
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# GPIO driver options
+CONFIG_GPIO=y
+
+# HW DSP options
+#CONFIG_SOC_ANDES_V5_HWDSP=y

boards/riscv/hpm6750evkmini/pre_dt_board.cmake

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+# Copyright (c) 2022, hpmicro
+# SPDX-License-Identifier: Apache-2.0
+
+# Suppress "simple_bus_reg" on HPMicro boards as all GPIO ports use the same register.
+list(APPEND EXTRA_DTC_FLAGS "-Wno-simple_bus_reg")