boards: shields: add MikroElektronika ACCEL 13 Click shield

Add shield definition for the MikroElektronika ACCEL 13 Click.
The ACCEL 13 Click carries a IIS2DLPC ultra-low power triaxial
accelerometer sensor in a mikroBUS form factor.

Signed-off-by: Mark Olsson <mark@markolsson.se>

boards/shields/mikroe_accel13_click/Kconfig.shield

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+# Copyright (c) 2023 Mark Olsson <mark@markolsson.se>
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_MIKROE_ACCEL13_CLICK
+	def_bool $(shields_list_contains,mikroe_accel13_click)

boards/shields/mikroe_accel13_click/doc/index.rst

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+.. _mikroe_accel13_click_shield:
+
+MikroElektronika ACCEL 13 Click
+###############################
+
+Overview
+********
+
+The MikroElektronika ACCEL 13 Click carries the `IIS2DLPC`_ ultra-low
+power triaxial accelerometer sensor in a `mikroBUS`_ |trade| form factor.
+
+The `IIS2DLPC`_ sensor supports both SPI and I2C bus protocols. Currently
+only I2C is supported for this shield.
+
+.. figure:: accel-13-click.jpg
+   :align: center
+   :alt: MikroElektronika ACCEL 13 Click
+
+   MikroElektronika ACCEL 13 Click (Credit: MikroElektronika)
+
+Requirements
+************
+
+This shield can only be used with a development board that provides a
+configuration for mikroBUS connectors and defines a node alias for the mikroBUS
+I2C interface (see :ref:`shields` for more details).
+
+For more information about interfacing the IIS2DLPC and the ACCEL 13 Click,
+see the following documentation:
+
+- `IIS2DLPC Datasheet`_
+- `ACCEL 13 Click`_
+
+Programming
+***********
+
+Set ``-DSHIELD=mikro_accel13_click`` when you invoke ``west build``. For
+example:
+
+.. zephyr-app-commands::
+   :zephyr-app: test/boards/board_shell
+   :board: lpcxpresso55s69
+   :shield: mikroe_accel13_click
+   :goals: build
+
+.. _IIS2DLPC:
+   https://www.st.com/en/mems-and-sensors/iis2dlpc.html
+
+.. _mikroBUS:
+   https://www.mikroe.com/mikrobus
+
+.. _IIS2DLPC Datasheet:
+   https://www.st.com/resource/en/datasheet/iis2dlpc.pdf
+
+.. _ACCEL 13 Click:
+   https://www.mikroe.com/accel-13-click

boards/shields/mikroe_accel13_click/mikroe_accel13_click.overlay

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+/*
+ * Copyright (c) 2023 Mark Olsson <mark@markolsson.se>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		accel0 = &iis2dlpc_mikroe_accel13_click;
+	};
+};
+
+&mikrobus_i2c {
+	status = "okay";
+
+	iis2dlpc_mikroe_accel13_click: iis2dlpc@18 {
+		compatible = "st,iis2dlpc";
+		reg = <0x18>;
+		drdy-gpios =  <&mikrobus_header 7 GPIO_ACTIVE_HIGH>;
+		drdy-int =  <2>;
+		status = "okay";
+	};
+};