boards: adafruit: add initial support for feather m4 express

The Adafruit Feather M4 Express is a compact, lightweight
ARM development board with an onboard mini NeoPixel, 2 MiB
of SPI flash, charging status indicator and user LEDs, USB
connector, 21 GPIO pins and a small prototyping area.

Signed-off-by: Teresa Zepeda Ventura <[email protected]>

Author: Terezvent

boards/adafruit/feather_m4_express/Kconfig.adafruit_feather_m4_express

@@ -0,0 +1,5 @@
+# Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_M4_EXPRESS
+	select SOC_SAMD51J19A

boards/adafruit/feather_m4_express/adafruit_feather_m4_express-pinctrl.dtsi

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2022, Gerson Fernando Budke <[email protected]>
+ * Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/samd51j-pinctrl.h>
+
+&pinctrl {
+	sercom1_spi_default: sercom1_spi_default {
+		group1 {
+			pinmux = <PB23C_SERCOM1_PAD3>,
+				 <PA17C_SERCOM1_PAD1>,
+				 <PB22C_SERCOM1_PAD2>;
+		};
+	};
+
+	sercom2_i2c_default: sercom3_i2c_default {
+		group1 {
+			pinmux = <PA12C_SERCOM2_PAD0>,
+				 <PA13C_SERCOM2_PAD1>;
+		};
+	};
+
+	sercom5_uart_default: sercom5_uart_default {
+		group1 {
+			pinmux = <PB17C_SERCOM5_PAD1>,
+				 <PB16C_SERCOM5_PAD0>;
+		};
+	};
+
+	pwm0_default: pwm0_default {
+		group1 {
+			pinmux = <PA22G_TCC0_WO2>;
+		};
+	};
+	pwm1_default: pwm1_default {
+		group1 {
+			pinmux = <PA18F_TCC1_WO2>,
+				 <PA19F_TCC1_WO3>;
+		};
+	};
+
+	usb_dc_default: usb_dc_default {
+		group1 {
+			pinmux = <PA25H_USB_DP>,
+				 <PA24H_USB_DM>;
+		};
+	};
+};

boards/adafruit/feather_m4_express/adafruit_feather_m4_express.dts

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2020 Google LLC.
+ * Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <atmel/samd5xx19.dtsi>
+#include "adafruit_feather_m4_express-pinctrl.dtsi"
+
+/ {
+	model = "Adafruit Feather M4 Express";
+	compatible = "adafruit,feather-m4-express";
+
+	chosen {
+		zephyr,console = &sercom5;
+		zephyr,shell-uart = &sercom5;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &code_partition;
+	};
+
+	/* These aliases are provided for compatibility with samples */
+	aliases {
+		led0 = &led0;
+		pwm-0 = &tcc0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0: led_0 {
+			gpios = <&porta 23 0>;
+			label = "LED";
+		};
+	};
+};
+
+&cpu0 {
+	clock-frequency = <120000000>;
+};
+
+&sercom5 {
+	status = "okay";
+	compatible = "atmel,sam0-uart";
+	current-speed = <115200>;
+	rxpo = <1>;
+	txpo = <0>;
+	pinctrl-0 = <&sercom5_uart_default>;
+	pinctrl-names = "default";
+};
+
+&sercom1 {
+	status = "okay";
+	compatible = "atmel,sam0-spi";
+	dipo = <3>;
+	dopo = <0>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&sercom1_spi_default>;
+	pinctrl-names = "default";
+};
+
+&tcc0 {
+	status = "okay";
+	compatible = "atmel,sam0-tcc-pwm";
+	prescaler = <8>;
+	#pwm-cells = <2>;
+	pinctrl-0 = <&pwm0_default>;
+	pinctrl-names = "default";
+};
+
+zephyr_udc0: &usb0 {
+	status = "okay";
+	pinctrl-0 = <&usb_dc_default>;
+	pinctrl-names = "default";
+};
+
+&dmac {
+	status = "okay";
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "uf2";
+			reg = <0x00000000 DT_SIZE_K(16)>;
+			read-only;
+		};
+
+		code_partition: partition@4000 {
+			label = "code";
+			reg = <0x4000 DT_SIZE_K(512-16-16)>;
+			read-only;
+		};
+
+		/*
+		 * The final 16 KiB is reserved for the application.
+		 * Storage partition will be used by FCB/LittleFS/NVS
+		 * if enabled.
+		 */
+		storage_partition: partition@7c000 {
+			label = "storage";
+			reg = <0x7c000 DT_SIZE_K(16)>;
+		};
+	};
+};

boards/adafruit/feather_m4_express/adafruit_feather_m4_express.yaml

@@ -0,0 +1,20 @@
+identifier: adafruit_feather_m4_express
+name: Adafruit Feather M4 Express
+type: mcu
+arch: arm
+ram: 192
+flash: 512
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - dma
+  - gpio
+  - hwinfo
+  - pwm
+  - spi
+  - uart
+  - usb_device
+  - watchdog
+vendor: adafruit

boards/adafruit/feather_m4_express/adafruit_feather_m4_express_defconfig

@@ -0,0 +1,17 @@
+# Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_ATMEL_SAMD5X_OSCULP32K_AS_MAIN=y
+
+CONFIG_BOOTLOADER_BOSSA=y
+CONFIG_BOOTLOADER_BOSSA_ADAFRUIT_UF2=y
+CONFIG_BUILD_OUTPUT_HEX=y
+CONFIG_BUILD_OUTPUT_UF2=y
+
+CONFIG_ARM_MPU=y
+CONFIG_HW_STACK_PROTECTION=y
+
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y

boards/adafruit/feather_m4_express/board.cmake

@@ -0,0 +1,5 @@
+# Copyright (c) 2020 Google LLC.
+# SPDX-License-Identifier: Apache-2.0
+
+include(${ZEPHYR_BASE}/boards/common/bossac.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/adafruit/feather_m4_express/board.yml

@@ -0,0 +1,6 @@
+board:
+  name: adafruit_feather_m4_express
+  full_name: Feather M4 Express
+  vendor: adafruit
+  socs:
+    - name: samd51j19a