boards: m5stack_cores3: enable 3-wire MIPI DBI panel

boards/m5stack/m5stack_cores3/Kconfig.defconfig

@@ -8,4 +8,7 @@ if BOARD_M5STACK_CORES3_ESP32S3_PROCPU || BOARD_M5STACK_CORES3_ESP32S3_PROCPU_SE
 config INPUT
 	default y
 
+config MIPI_DBI_SPI_3WIRE
+	default y
+
 endif # BOARD_M5STACK_CORES3_ESP32S3_PROCPU || BOARD_M5STACK_CORES3_ESP32S3_PROCPU_SE

boards/m5stack/m5stack_cores3/m5stack_cores3-pinctrl.dtsi

@@ -48,7 +48,18 @@
 	spim2_default: spim2_default {
 		group1 {
 			pinmux = <SPIM2_MISO_GPIO35>,
-				 <SPIM2_SCLK_GPIO36>;
+			         <SPIM2_SCLK_GPIO36>;
+		};
+
+		group2 {
+			pinmux = <SPIM2_MOSI_GPIO37>;
+			output-low;
+		};
+	};
+
+	spim2_ili9342c_3wire: spim2_ili9342c_3wire {
+		group1 {
+			pinmux = <SPIM2_SCLK_GPIO36>;
 		};
 
 		group2 {

boards/m5stack/m5stack_cores3/m5stack_cores3_procpu_common.dtsi

@@ -9,18 +9,22 @@
 #include "m5stack_cores3-pinctrl.dtsi"
 #include "m5stack_mbus_connectors.dtsi"
 #include "grove_connectors.dtsi"
+#include <zephyr/dt-bindings/display/ili9xxx.h>
+#include <zephyr/dt-bindings/mipi_dbi/mipi_dbi.h>
+#include <zephyr/dt-bindings/spi/spi.h>
 
 / {
-	chosen {
-		zephyr,sram = &sram1;
-		zephyr,console = &usb_serial;
-		zephyr,shell-uart = &usb_serial;
-		zephyr,flash = &flash0;
-		zephyr,code-partition = &slot0_partition;
-		zephyr,rtc = &bm8563_rtc;
-		zephyr,bt-hci = &esp32_bt_hci;
-		zephyr,touch = &ft6336_touch;
-	};
+        chosen {
+                zephyr,sram = &sram1;
+                zephyr,console = &usb_serial;
+                zephyr,shell-uart = &usb_serial;
+                zephyr,flash = &flash0;
+                zephyr,code-partition = &slot0_partition;
+                zephyr,rtc = &bm8563_rtc;
+                zephyr,bt-hci = &esp32_bt_hci;
+                zephyr,touch = &ft6336_touch;
+                zephyr,display = &ili9342c;
+        };
 
 	aliases {
 		uart-0 = &uart0;
@@ -35,9 +39,36 @@
 		fuel-gauge0 = &fuel_gauge;
 	};
 
-	lvgl_pointer {
-		compatible = "zephyr,lvgl-pointer-input";
-		input = <&ft6336_touch>;
+        lvgl_pointer {
+                compatible = "zephyr,lvgl-pointer-input";
+                input = <&ft6336_touch>;
+        };
+
+	mipi_dbi {
+		compatible = "zephyr,mipi-dbi-spi";
+		spi-dev = <&spi2>;
+		write-only;
+		status = "okay";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-0 = <&spim2_ili9342c_3wire>;
+		pinctrl-1 = <&spim2_default>;
+		pinctrl-names = "default", "sleep";
+
+		ili9342c: ili9342c@0 {
+			compatible = "ilitek,ili9342c";
+			reg = <0>;
+			status = "okay";
+			mipi-max-frequency = <20000000>;
+			duplex = <SPI_HALF_DUPLEX>;
+			mipi-mode = "MIPI_DBI_MODE_SPI_3WIRE";
+			vin-supply = <&vcc_bl>;
+			pixel-format = <ILI9XXX_PIXEL_FORMAT_RGB565>;
+			display-inversion;
+			width = <320>;
+			height = <240>;
+			rotation = <0>;
+		};
 	};
 };