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path: root/overlays/apalis-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,apalis-imx8qxp";
};

&i2c0 {
	#address-cells = <1>;
	#size-cells = <0>;

	/* 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>;
	};
};

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