boards: Add lvgl pointer support on m5stack_core2

Added lvgl-pointer definition in devicetree, to enable
touch-support in lvgl applications.
Kscan support has been removed from m5stack_core2 as this was just a
temporary thing.
Has been tested with lvgl hello world sample.

(cherry picked from commit 147109a)

Original-Signed-off-by: Martin Kiepfer <m.kiepfer@teleschirm.org>
GitOrigin-RevId: 147109a
Change-Id: I39eca60c7543df835e947a51e6e2f65767067160
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5407196
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com>
Commit-Queue: Fabio Baltieri <fabiobaltieri@google.com>

boards/xtensa/m5stack_core2/Kconfig.defconfig

@@ -39,11 +39,8 @@ config GPIO_HOGS_INIT_PRIORITY
 config INPUT_FT5336_INTERRUPT
 	default y if INPUT
 
-config KSCAN
-	default y if DISPLAY
-
 config INPUT
-	default y if KSCAN
+	default y
 
 config LV_COLOR_16_SWAP
 	default y if LVGL

boards/xtensa/m5stack_core2/m5stack_core2.dts

@@ -30,7 +30,6 @@
 		zephyr,shell-uart = &uart0;
 		zephyr,flash = &flash0;
 		zephyr,display = &ili9342c;
-		zephyr,keyboard-scan = &kscan_input;
 		zephyr,code-partition = &slot0_partition;
 		zephyr,rtc = &pfc8563_rtc;
 	};
@@ -42,6 +41,11 @@
 			label = "Power LED";
 		};
 	};
+
+	lvgl_pointer {
+		compatible = "zephyr,lvgl-pointer-input";
+		input = <&ft5336_touch>;
+	};
 };
 
 &cpu0 {
@@ -154,14 +158,10 @@
 		};
 	};
 
-	ft5336@38 {
+	ft5336_touch: ft5336@38 {
 		compatible = "focaltech,ft5336";
 		reg = <0x38>;
 		int-gpios = <&gpio1 7 0>;
-
-		kscan_input: kscan-input {
-			compatible = "zephyr,kscan-input";
-		};
 	};
 };