rpi-display-overlay.dts

/*
 * Device Tree overlay for rpi-display by Watterott
 *
 */

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2708";

	fragment@0 {
		target = <&spi0>;
		__overlay__ {
			status = "okay";

			spidev@0{
				status = "disabled";
			};

			spidev@1{
				status = "disabled";
			};
		};
	};

	fragment@1 {
		target = <&gpio>;
		__overlay__ {
			rpi_display_pins: rpi_display_pins {
				brcm,pins = <18 23 24 25>;
				brcm,function = <1 1 1 0>; /* out out out in */
			};
		};
	};

	fragment@2 {
		target = <&spi0>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;

			rpidisplay: rpi-display@0{
				compatible = "mi,mi0283qt";
				reg = <0>;
				//pinctrl-names = "default";
				//pinctrl-0 = <&rpi_display_pins>;

				spi-max-frequency = <32000000>;
				rotation = <180>;
				reset-gpios = <&gpio 23 0>;
				dc-gpios = <&gpio 24 0>;
				backlight = <&backlight>;
			};

			rpi-display-ts@1 {
				compatible = "ti,ads7846";
				reg = <1>;

				spi-max-frequency = <2000000>;
				interrupts = <25 2>; /* high-to-low edge triggered */
				interrupt-parent = <&gpio>;
				pendown-gpio = <&gpio 25 0>;
				ti,x-plate-ohms = /bits/ 16 <60>;
				ti,pressure-max = /bits/ 16 <255>;
			};
		};
	};

	fragment@3 {
		target-path = "/soc";
		__overlay__ {
			backlight: backlight {
				compatible = "gpio-backlight";
				gpios = <&gpio 18 0>;
			};
		};
	};

/*

Alternative pwm backlight section

	fragment@3 {
		target = <&gpio>;
		__overlay__ {
			// This is necessary on Pi1,2,Z not Pi3
			pinctrl-0 = <&gpioout &alt0>; // Remove i2s_alt0 which claims gpio18
		};
	};

	fragment@4 {
		target = <&pwm>;
		__overlay__ {
			pinctrl-names = "default";
			pinctrl-0 = <&pwm0_gpio18>;
			status = "okay";
		};
	};

	fragment@5 {
		target-path = "/soc";
		__overlay__ {
			backlight: backlight {
				compatible = "pwm-backlight";
				pwms = <&pwm 0 5000000>;
				// These levels need calibration
				brightness-levels = <0 5 10 20 40 60 80 100>;
				default-brightness-level = <7>;
			};
		};
	};
*/

	__overrides__ {
		speed = <&rpidisplay>,"spi-max-frequency:0";
		rotation = <&rpidisplay>,"rotation:0";
		format = <&rpidisplay>,"format";
	};
};