tests: drivers: display: display_read_write: add support for ILI9340

Add support for ILI9340 to display_read_write test. This support was
verified with the adafruit_2_8_tft_touch_v2 shield.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

boards/shields/adafruit_2_8_tft_touch_v2/dts/adafruit_2_8_tft_touch_v2.dtsi

@@ -19,7 +19,7 @@
 		invert-y;
 	};
 
-	adafruit_2_8_tft_touch_v2_mipi_dbi {
+	adafruit_2_8_tft_touch_v2_mipi_dbi: adafruit_2_8_tft_touch_v2_mipi_dbi {
 		compatible = "zephyr,mipi-dbi-spi";
 		spi-dev = <&arduino_spi>;
 		dc-gpios = <&arduino_header 15 GPIO_ACTIVE_HIGH>;	/* D9 */

tests/drivers/display/display_read_write/adafruit_2_8_tft_touch_rgb565.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2024 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/display/ili9xxx.h>
+
+&adafruit_2_8_tft_touch_v2_ili9340 {
+	pixel-format = <ILI9XXX_PIXEL_FORMAT_RGB565>;
+};
+
+&adafruit_2_8_tft_touch_v2_mipi_dbi {
+	/delete-property/ write-only;
+};

tests/drivers/display/display_read_write/testcase.yaml

@@ -50,3 +50,15 @@ tests:
     extra_configs:
       - CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_BGR_565=y
       - CONFIG_SDL_DISPLAY_USE_HARDWARE_ACCELERATOR=n
+  drivers.display.read_write.ili9340:
+    tags:
+      - shield
+    extra_args:
+      - SHIELD=adafruit_2_8_tft_touch_v2
+      - EXTRA_DTC_OVERLAY_FILE=adafruit_2_8_tft_touch_rgb565.overlay
+    extra_configs:
+      - CONFIG_ILI9XXX_READ=y
+    # Use platform_allow, because we cannot filter the test based on the
+    # presence of the arduino_spi DT nodelabel
+    platform_allow:
+      - mimxrt685_evk/mimxrt685s/cm33