boards: shields: Added Mikroe Stepper 19 Click Shield

This shield includes a ti drv8424 stepper driver that is controlled
via gpio. Some of these pins are only available via the tca9538a gpio
expander on the shield.

Signed-off-by: Jan Behrens <[email protected]>

Author: jbehrensnx

boards/shields/mikroe_stepper_19_click/Kconfig.shield

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+# Copyright (c) 2025 Navimatix GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_MIKROE_STEPPER_19_CLICK
+	def_bool $(shields_list_contains,mikroe_stepper_19_click)

boards/shields/mikroe_stepper_19_click/doc/index.rst

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+.. _mikroe_stepper_19_click_shield:
+
+MikroElektronika Stepper 19 Click
+#################################
+
+Overview
+********
+
+Stepper 19 Click shield has a TI DRV8424 stepper driver accessed via GPIO and
+a TI TCA9538 GPIO expander accessed via I2C. Some DRV8424 pins are accessed
+via the GPIO expander.
+The DRV8424 uses by default the work-queue timing source, but that can be changed.
+
+More information about the shield can be found at
+`Mikroe Stepper 19 click`_.
+
+.. figure:: stepper_19_click.webp
+   :align: center
+   :alt: MikroElektronika Stepper 19 Click
+
+   MikroElektronika Stepper 19 Click (Credit: MikroElektronika)
+
+Requirements
+************
+
+The shield uses a mikroBUS interface. The target board must define
+a ``mikrobus_i2c`` and ``mikrobus_header``  node labels
+(see :ref:`shields` for more details).
+
+Programming
+***********
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/drivers/stepper/generic/
+   :board: <board>
+   :shield: mikroe_stepper_19_click
+   :goals: build flash
+
+References
+**********
+
+.. target-notes::
+
+.. _Mikroe Stepper 19 click:
+   https://www.mikroe.com/stepper-19-click

boards/shields/mikroe_stepper_19_click/doc/stepper_19_click.webp

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+/*
+ * Copyright (c) 2025 Navimatix GmbH
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		stepper = &drv8424_mikroe_stepper_19_click;
+	};
+};
+
+&mikrobus_i2c {
+	status = "okay";
+
+	tca9538a_mikroe_stepper_19_click: tca9538a@70 {
+		status = "okay";
+		compatible = "ti,tca9538";
+
+		reg = <0x70>;
+
+		gpio-controller;
+		ngpios = <8>;
+		#gpio-cells = <2>;
+
+		gpio-reserved-ranges = <7 1>;
+
+		gpio-line-names =
+			"M0",
+			"M1",
+			"DEC0",
+			"DEC1",
+			"TOFF",
+			"STP",
+			"DIR";
+	};
+};
+
+/ {
+	drv8424_mikroe_stepper_19_click: drv8424 {
+		status = "okay";
+		compatible = "ti,drv84xx";
+
+		dir-gpios = <&mikrobus_header 0 0>;
+		step-gpios = <&mikrobus_header 6 0>;
+		sleep-gpios = <&mikrobus_header 1 GPIO_ACTIVE_LOW>;
+		en-gpios  = <&mikrobus_header 2 0>;
+		fault-gpios = <&mikrobus_header 7 GPIO_ACTIVE_LOW>;
+		m0-gpios = <&tca9538a_mikroe_stepper_19_click 0 0>;
+		m1-gpios = <&tca9538a_mikroe_stepper_19_click 1 0>;
+	};
+};

boards/shields/mikroe_stepper_19_click/mikroe_stepper_19_click.overlay

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+shield:
+  name: mikroe_stepper_19_click
+  full_name: Stepper 19 Click
+  vendor: mikroe
+  supported_features:
+    - stepper