boards: stm32h573i_dk: add touch panel support

- The stm32h573i_dk board uses a ft3267 i2c controller for the touchscreen
connected on i2c4.
  - The zephyr driver ft5336 can control it.
- Use the I2C STM32 V2 Timing calculation.

Signed-off-by: Samuel Quiniou <samuel.quiniou@rtone.fr>

boards/st/stm32h573i_dk/Kconfig.defconfig

@@ -31,6 +31,12 @@ endchoice
 config REGULATOR
 	default y
 
+config INPUT
+	default y if LVGL
+
+config I2C_STM32_V2_TIMING
+	default y if INPUT
+
 endif # DISPLAY
 
 endif # BOARD_STM32H573I_DK

boards/st/stm32h573i_dk/doc/index.rst

@@ -180,14 +180,14 @@ Serial Port
 STM32H573I-DK Discovery board has 3 U(S)ARTs. The Zephyr console output is
 assigned to USART1. Default settings are 115200 8N1.
 
-TFT LCD screen
---------------
+TFT LCD screen and touch panel
+------------------------------
 
-The TFT LCD screen is supported for the STM32H573I-DK Discovery board.
-It can be tested using :zephyr:code-sample:`display` sample:
+The TFT LCD screen and touch panel are supported for the STM32H573I-DK Discovery board.
+They can be tested using :zephyr:code-sample:`lvgl` sample:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/drivers/display
+   :zephyr-app: samples/subsys/display/lvgl
    :board: stm32h573i_dk
    :goals: build
 

boards/st/stm32h573i_dk/stm32h573i_dk.dts

@@ -80,6 +80,13 @@
 		/* The ATTR_MPU_EXTMEM attribut causing a MPU FAULT */
 		zephyr,memory-attr = <( DT_MEM_ARM(ATTR_MPU_IO) )>;
 	};
+
+	lvgl_pointer {
+		compatible = "zephyr,lvgl-pointer-input";
+		input = <&ft3267>;
+		display = <&st7789v>;
+		invert-y;
+	};
 };
 
 &fmc {
@@ -200,6 +207,20 @@
 	status = "okay";
 };
 
+&i2c4 {
+	pinctrl-0 = <&i2c4_scl_pb8 &i2c4_sda_pb9>;
+	pinctrl-names = "default";
+	clock-frequency = <I2C_BITRATE_FAST>;
+	status = "okay";
+
+	ft3267: ft3267@38 {
+		compatible = "focaltech,ft5336";
+		reg = <0x38>;
+		int-gpios = <&gpiog 7 GPIO_ACTIVE_LOW>;
+		reset-gpios = <&gpiog 3 GPIO_ACTIVE_LOW>;
+	};
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
 	pinctrl-names = "default";