boards: shield: Support touch for the NXP LCD-PAR-S035 LCD on MCXN947

NXP LCD-PAR-S035 LCD supports touch: enable it
The reset pin of the LCD and the touch controller
are shared so we set alt-addr to select GT911 I2C
address by probing

Co-authored-by: Pascal Mareau <[email protected]>
Co-authored-by: Guido Roncarolo <[email protected]

Signed-off-by: Guido Roncarolo <[email protected]>

Author: groncarolonxp

boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi

@@ -52,14 +52,26 @@
 			status = "disabled";
 		};
 	};
+
+	nxp_flexio_connector: flexio-connector {
+		compatible = "gpio-nexus";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map =	<
+			0  0 &gpio4 6 0 /* Pin 6, INT */
+			1  0 &gpio4 0 0 /* Pin 0, BOGUS RESET */
+		>;
+	};
+
 };
 
 &flexcomm1_lpspi1 {
 	pinctrl-0 = <&pinmux_flexcomm1_lpspi>;
 	pinctrl-names = "default";
 };
 
-&flexcomm2_lpi2c2 {
+flexio_i2c: &flexcomm2_lpi2c2 {
 	pinctrl-0 = <&pinmux_flexcomm2_lpi2c>;
 	pinctrl-names = "default";
 	clock-frequency = <I2C_BITRATE_STANDARD>;

boards/shields/lcd_par_s035/Kconfig.defconfig

@@ -4,6 +4,11 @@
 if SHIELD_LCD_PAR_S035
 if LVGL
 
+# Configure LVGL to use touchscreen with KSCAN API
+
+config INPUT
+	default y
+
 # Enable double buffering
 config LV_Z_DOUBLE_VDB
 	default y

boards/shields/lcd_par_s035/boards/frdm_mcxn947_mcxn947_cpu0.overlay

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2024, NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+&flexio_i2c {
+	status = "okay";
+	gt911_lcd_par_s035: gt911-lcd_par_s035@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		irq-gpios = <&nxp_flexio_connector 0 GPIO_ACTIVE_HIGH>;
+		/delete-property/ reset-gpios;
+		alt-addr = <0x14>;
+	};
+};

boards/shields/lcd_par_s035/lcd_par_s035_8080.overlay

@@ -10,6 +10,13 @@
 	chosen {
 		zephyr,display = &st7796s;
 	};
+
+	lvgl_pointer {
+		compatible = "zephyr,lvgl-pointer-input";
+		input = <&gt911_lcd_par_s035>;
+		swap-xy;
+		invert-y;
+	};
 };
 
 &nxp_flexio_lcd {
@@ -39,3 +46,13 @@
 		color-invert;
 	};
 };
+
+&flexio_i2c {
+	status = "okay";
+	gt911_lcd_par_s035: gt911-lcd_par_s035@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		irq-gpios = <&nxp_flexio_connector 0 GPIO_ACTIVE_HIGH>; // INT
+		reset-gpios = <&nxp_flexio_connector 1 GPIO_ACTIVE_HIGH>; // RESET
+	};
+};