tests: drivers: spi: spi_loopback: Support RTIO tests for APARD32690

Add overlay for APARD32690 board and add a new test case to
test RTIO functionalities of SPI MAX32 driver.

Signed-off-by: Dimitrije Lilic <dimitrije.lilic@orioninc.com>

boards/adi/apard32690/apard32690_max32690_m4.dts

@@ -104,6 +104,22 @@ arduino_serial: &uart1 {
 	current-speed = <115200>;
 };
 
+&spi1a_miso_p1_28 {
+	power-source = <MAX32_VSEL_VDDIOH>;
+};
+
+&spi1a_mosi_p1_29 {
+	power-source = <MAX32_VSEL_VDDIOH>;
+};
+
+&spi1a_sck_p1_26 {
+	power-source = <MAX32_VSEL_VDDIOH>;
+};
+
+&spi1a_ss0_p1_23 {
+	power-source = <MAX32_VSEL_VDDIOH>;
+};
+
 arduino_spi: &spi1 {
 	pinctrl-0 = <&spi1a_miso_p1_28 &spi1a_mosi_p1_29 &spi1a_sck_p1_26
 		     &spi1a_ss0_p1_23>;

tests/drivers/spi/spi_loopback/boards/apard32690_max32690_m4.overlay

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2024 Analog Devices, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+arduino_spi: &spi1 {
+	status = "okay";
+	slow@0 {
+		compatible = "test-spi-loopback-slow";
+		reg = <0>;
+		spi-max-frequency = <128000>;
+	};
+	fast@0 {
+		compatible = "test-spi-loopback-fast";
+		reg = <0>;
+		spi-max-frequency = <500000>;
+	};
+};

tests/drivers/spi/spi_loopback/overlay-max32-spi-rtio.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2024 Analog Devices, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+CONFIG_SPI_RTIO=y
+CONFIG_SPI_ASYNC=n

tests/drivers/spi/spi_loopback/testcase.yaml

@@ -204,3 +204,9 @@ tests:
   drivers.spi.max32_dma.loopback:
     extra_args: OVERLAY_CONFIG="overlay-max32-spi-dma.conf"
     filter: CONFIG_SOC_FAMILY_MAX32
+  drivers.spi.max32_spi_rtio.loopback:
+    extra_args:
+      - OVERLAY_CONFIG="overlay-max32-spi-rtio.conf"
+    filter: CONFIG_SOC_FAMILY_MAX32
+    platform_allow:
+      - apard32690/max32690/m4