add gardena_rm_sim3u

Signed-off-by: Michael Zimmermann <[email protected]>

boards/arm/gardena_rm_sim3u/CMakeLists.txt

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()

boards/arm/gardena_rm_sim3u/Kconfig.board

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_GARDENA_RM_SIM3U
+	bool "GARDENA SIM3U radio module"
+	depends on SOC_SERIES_SIM3U
+	select SOC_PART_NUMBER_SIM3U167_B_GM

boards/arm/gardena_rm_sim3u/Kconfig.defconfig

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_GARDENA_RM_SIM3U
+
+config BOARD
+	default "gardena_rm_sim3u"
+
+endif # BOARD_GARDENA_RM_SIM3U

boards/arm/gardena_rm_sim3u/board.cmake

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/arm/gardena_rm_sim3u/doc/index.rst

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+.. _boardname_linkname:
+
+GARDENA SIM3U radio module
+##########################
+
+Overview
+********
+
+This is a SoM that is used as a radio module by the GARDENA smart Gateway.
+
+.. figure:: gardena_rm_sim3u.jpg
+   :align: center
+   :alt: GARDENA SIM3U radio module
+
+Hardware
+********
+
+- SIM3U167B-GM SoC
+- SPI si4467 transceiver
+- Controls an RGB LED via high drive pins. It's expected to mirror the
+  state of 3 low-drive pins coming from the Linux SoC.
+- UART is connected to the Linux SoC. Usually it's used for PPP, but it can
+  also be used for debugging when PPP is not active.
+
+Supported Features
+==================
+
+- USART: polling and interrupt mode
+
+
+Programming and Debugging
+*************************
+
+Flashing
+========
+
+The easiest way is to do this via SSH from the Linux SoM that's connected to
+the SIM3U SoM.
+
+On your building machine:
+
+.. code-block:: console
+   scp -O build/zephyr/zephyr.hex root@IP:/tmp/
+
+On the gateway:
+
+.. code-block:: console
+   openocd -f board/gardena_radio.cfg -c 'program /tmp/zephyr.hex verify exit'
+   reset-rm
+
+
+Debugging
+=========
+
+The easiest way is to do this via SSH from the Linux gateway as well:
+
+.. code-block:: console
+   openocd -f board/gardena_radio.cfg -c init
+
+
+References
+**********
+
+.. _User manual:
+   https://www.gardena.com/tdrdownload//pub000070911/doc000120830
+
+.. _SoC product page:
+   https://www.silabs.com/mcu/32-bit-microcontrollers/precision32-sim3u1xx/device.SiM3U167-B-GQ?tab=specs
+
+.. _Yocto source code and documentation:
+   https://github.com/husqvarnagroup/smart-garden-gateway-public

boards/arm/gardena_rm_sim3u/gardena_rm_sim3u-pinctrl.dtsi

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+/*
+ * Copyright (c) 2023 GARDENA GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/pinctrl/si32-pinctrl.h>
+
+&pinctrl {
+	usart0_default: usart0_default {
+		group1 {
+			pinmux = <SI32_MUX(USART0_TX, 0, 0)>,
+				<SI32_MUX(USART0_RTS, 0, 2)>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <SI32_MUX(USART0_RX, 0, 1)>,
+				<SI32_MUX(USART0_CTS, 0, 3)>;
+			input-enable;
+		};
+	};
+};
+

boards/arm/gardena_rm_sim3u/gardena_rm_sim3u.dts

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+/*
+ * Copyright (c) 2023 GARDENA GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <silabs/sim3u167bgm.dtsi>
+#include "gardena_rm_sim3u-pinctrl.dtsi"
+
+/ {
+	model = "GARDENA sim3u radio module";
+	compatible = "gardena,rm_sim3u", "silabs,sim3u";
+
+	chosen {
+		zephyr,console = &usart0;
+		zephyr,shell-uart = &usart0;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&cpu0 {
+	clock-frequency = <76953600>;
+};
+
+&pll0 {
+	status = "okay";
+};
+
+&clk_ahb {
+	clocks = <&pll0>;
+	status = "okay";
+};
+
+&clk_apb {
+	divider = <2>;
+	status = "okay";
+};
+
+&usart0 {
+	current-speed = <115200>;
+	pinctrl-0 = <&usart0_default>;
+	pinctrl-names = "default";
+	hw-flow-control;
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&gpio2 {
+	disable-pullups;
+	status = "okay";
+};
+
+&gpio3 {
+	status = "okay";
+};
+
+&flash0 {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		slot0_partition: partition@0 {
+			label = "image-0";
+			reg = <0x00000000 DT_SIZE_K(1664)>;
+		};
+
+		storage_partition: partition@250000 {
+			label = "storage";
+			reg = <0x00030000 DT_SIZE_K(64)>;
+		};
+	};
+};

boards/arm/gardena_rm_sim3u/gardena_rm_sim3u.yaml

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: gardena_rm_sim3u
+name: GARDENA sim3u radio module
+type: mcu
+arch: arm
+ram: 32
+flash: 256
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - gpio

boards/arm/gardena_rm_sim3u/gardena_rm_sim3u_defconfig

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+CONFIG_SOC_SERIES_SIM3U=y
+
+# enable uart driver
+CONFIG_SERIAL=y
+
+# enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# enable GPIO
+CONFIG_GPIO=y

boards/arm/gardena_rm_sim3u/support/openocd.cfg

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+# Copyright (c) 2023 GARDENA GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+
+source [find interface/ftdi/olimex-arm-usb-tiny-h.cfg]
+source [find interface/ftdi/olimex-arm-jtag-swd.cfg]
+
+source [find target/sim3x.cfg]
+
+reset_config none separate
+
+$_TARGETNAME configure -event gdb-attach {
+        echo "Debugger attaching: halting execution"
+        reset halt
+        gdb_breakpoint_override hard
+}
+
+$_TARGETNAME configure -event gdb-detach {
+        echo "Debugger detaching: resuming execution"
+        resume
+}