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path: root/overlays/colibri-imx8x_ad7879_overlay.dts
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// Enable the resistive touch controller (AD7879) on the module

/dts-v1/;
/plugin/;

#include "dt-bindings/interrupt-controller/irq.h"
#include "dt-bindings/gpio/gpio.h"
#include "dt-bindings/pinctrl/pads-imx8qxp.h"

/ {
	compatible = "toradex,colibri-imx8qxp";
	fragment@0 {
		target = <&i2c0>;
		__overlay__ {
			/* Touch controller */
			ad7879@2c {
				compatible = "adi,ad7879-1";
				pinctrl-names = "default";
				pinctrl-0 = <&pinctrl_ad7879_int>;
				reg = <0x2c>;
				interrupt-parent = <&gpio3>;
				interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
				touchscreen-max-pressure = <4096>;
				adi,resistance-plate-x = <120>;
				adi,first-conversion-delay = /bits/ 8 <3>;
				adi,acquisition-time = /bits/ 8 <1>;
				adi,median-filter-size = /bits/ 8 <2>;
				adi,averaging = /bits/ 8 <1>;
				adi,conversion-interval = /bits/ 8 <255>;
			};
		};
	};

	fragment@1 {
		target = <&iomuxc>;
		__overlay__ {
			colibri-imx8qxp {
				/* On-module touch pen-down interrupt */
				pinctrl_ad7879_int: ad7879-int {
					fsl,pins = <
						SC_P_MIPI_CSI0_I2C0_SCL_LSIO_GPIO3_IO05		0x21
					>;
				};
			};
		};
	};
};