tests: drivers: Add test case for allegro a4979

Adding a test case for stepper driver implementation of
allegro a4979 microstepping programmable stepper motor driver.

Signed-off-by: Verena Schweinstetter <[email protected]>

Author: verenascst

tests/drivers/build_all/stepper/gpio.dtsi

@@ -19,6 +19,19 @@ adi_tmc2209: adi_tmc2209 {
 	counter = <&counter0>;
 };
 
+allegro_a4979: allegro_a4979 {
+	status = "okay";
+	compatible = "allegro,a4979";
+	micro-step-res = <1>;
+	reset-gpios = <&test_gpio 0 0>;
+	dir-gpios = <&test_gpio 0 0>;
+	step-gpios = <&test_gpio 0 0>;
+	en-gpios = <&test_gpio 0 0>;
+	m0-gpios = <&test_gpio 0 0>;
+	m1-gpios = <&test_gpio 0 0>;
+	counter = <&counter0>;
+};
+
 ti_drv8424: ti_drv8424 {
 	status = "okay";
 	compatible = "ti,drv8424";