1 files changed, 47 insertions, 0 deletions
diff --git a/overlays/colibri-imx8x_ad7879_overlay.dts b/overlays/colibri-imx8x_ad7879_overlay.dts
new file mode 100644
index 0000000..5587032
--- /dev/null
+++ b/overlays/colibri-imx8x_ad7879_overlay.dts
@@ -0,0 +1,47 @@
+// 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
+					>;
+				};
+			};
+		};
+	};
+};