tests: stepper_api: create a scaffold to generalize tests

This commit creates a scaffold for executing stepper_api tests
on the existing step_dir drivers.

Signed-off-by: Jilay Pandya <[email protected]>

Author: jilaypandya

tests/drivers/stepper/stepper_api/boards/native_sim.overlay

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2025 Jilay Sandeep Pandya
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+/ {
+	gpio1: gpio1 {
+		compatible = "zephyr,gpio-emul";
+		#gpio-cells = <0x2>;
+		status = "okay";
+		gpio-controller;
+	};
+
+	gpio2: gpio2 {
+		compatible = "zephyr,gpio-emul";
+		#gpio-cells = <0x2>;
+		status = "okay";
+		gpio-controller;
+	};
+
+	gpio3: gpio3 {
+		compatible = "zephyr,gpio-emul";
+		#gpio-cells = <0x2>;
+		status = "okay";
+		gpio-controller;
+	};
+
+	gpio4: gpio4 {
+		compatible = "zephyr,gpio-emul";
+		#gpio-cells = <0x2>;
+		status = "okay";
+		gpio-controller;
+	};
+};

tests/drivers/stepper/stepper_api/boards/native_sim_adi_tmc2209.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Jilay Sandeep Pandya
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "native_sim.overlay"
+
+/ {
+	aliases {
+		stepper =  &adi_tmc2209;
+	};
+};
+
+/ {
+	adi_tmc2209: adi_tmc2209 {
+		status = "okay";
+		compatible = "adi,tmc2209";
+		micro-step-res = <32>;
+		dir-gpios = <&gpio1 0 0>;
+		step-gpios = <&gpio1 1 0>;
+		en-gpios = <&gpio2 1 0>;
+		msx-gpios = <&gpio3 0 0>, <&gpio4 1 0>;
+		counter = <&counter0>;
+	};
+};

tests/drivers/stepper/stepper_api/boards/native_sim_ti_drv8424.overlay

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2025 Jilay Sandeep Pandya
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "native_sim.overlay"
+
+/ {
+	aliases {
+		stepper =  &ti_drv8424;
+	};
+};
+
+/ {
+	ti_drv8424: ti_drv8424 {
+		status = "okay";
+		compatible = "ti,drv8424";
+		micro-step-res = <8>;
+		dir-gpios = <&gpio1 0 0>;
+		step-gpios = <&gpio1 1 0>;
+		sleep-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
+		en-gpios = <&gpio2 1 0>;
+		m0-gpios = <&gpio3 0 0>;
+		m1-gpios = <&gpio3 1 0>;
+		counter = <&counter0>;
+	};
+};

tests/drivers/stepper/stepper_api/boards/native_sim_zephyr_gpio_stepper.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Jilay Sandeep Pandya
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "native_sim.overlay"
+
+/ {
+	aliases {
+		stepper =  &zephyr_gpio_stepper;
+	};
+};
+
+/ {
+	zephyr_gpio_stepper: zephyr_gpio_stepper {
+		compatible = "zephyr,gpio-stepper";
+		status = "okay";
+		micro-step-res = <1>;
+		gpios = <&gpio1 0 0>,
+				<&gpio2 0 0>,
+				<&gpio3 0 0>,
+				<&gpio4 0 0>;
+	};
+};

tests/drivers/stepper/stepper_api/boards/nucleo_f767zi.conf

@@ -6,9 +6,9 @@
  #include <zephyr/dt-bindings/gpio/gpio.h>
 
 / {
-	 zephyr,user {
-		 stepper-motors = <&motor_1 0>;
-	 };
+	aliases {
+		stepper =  &motor_1;
+	};
 };
 
 / {
@@ -25,11 +25,6 @@
 		 m0-gpios = <&arduino_header 16 0>;
 		 m1-gpios = <&arduino_header 17 0>;
 		 counter = <&counter2>;
-
-		 #address-cells = <1>;
-		 #size-cells = <0>;
-		 #stepper-motor-cells = <0>;
-
 	 };
 };
 

tests/drivers/stepper/stepper_api/boards/nucleo_f767zi.overlay renamed to tests/drivers/stepper/stepper_api/boards/nucleo_f767zi_ti_drv8424.overlay

@@ -3,6 +3,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/ {
+	aliases {
+		stepper =  &motor_1;
+	};
+};
+
 / {
 	motor_1: motor_1 {
 		compatible = "zephyr,gpio-stepper";