Brooklyn/arch/arm/boot/dts/overlays/pitft28-resistive-overlay.dts

/*
 * Device Tree overlay for Adafruit PiTFT 2.8" resistive touch screen
 *
 */

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2835";

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

	fragment@1 {
		target = <&spidev0>;
		__overlay__ {
			status = "disabled";
		};
	};

	fragment@2 {
		target = <&spidev1>;
		__overlay__ {
			status = "disabled";
		};
	};

	fragment@3 {
		target = <&gpio>;
		__overlay__ {
			pitft_pins: pitft_pins {
				brcm,pins = <24 25>;
				brcm,function = <0 1>; /* in out */
				brcm,pull = <2 0>; /* pullup none */
			};
		};
	};

	fragment@4 {
		target = <&spi0>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;

			pitft: pitft@0{
				compatible = "ilitek,ili9340";
				reg = <0>;
				pinctrl-names = "default";
				pinctrl-0 = <&pitft_pins>;

				spi-max-frequency = <32000000>;
				rotate = <90>;
				fps = <25>;
				bgr;
				buswidth = <8>;
				dc-gpios = <&gpio 25 0>;
				debug = <0>;
			};

			pitft_ts@1 {
				compatible = "st,stmpe610";
				reg = <1>;

				spi-max-frequency = <500000>;
				irq-gpio = <&gpio 24 0x2>; /* IRQF_TRIGGER_FALLING */
				interrupts = <24 2>; /* high-to-low edge triggered */
				interrupt-parent = <&gpio>;
				interrupt-controller;

				stmpe_touchscreen {
					compatible = "st,stmpe-ts";
					st,sample-time = <4>;
					st,mod-12b = <1>;
					st,ref-sel = <0>;
					st,adc-freq = <2>;
					st,ave-ctrl = <3>;
					st,touch-det-delay = <4>;
					st,settling = <2>;
					st,fraction-z = <7>;
					st,i-drive = <0>;
				};

				stmpe_gpio: stmpe_gpio {
					#gpio-cells = <2>;
					compatible = "st,stmpe-gpio";
					/*
					 * only GPIO2 is wired/available
					 * and it is wired to the backlight
					 */
					st,norequest-mask = <0x7b>;
				};
			};
		};
	};

	fragment@5 {
		target-path = "/soc";
		__overlay__ {
			backlight {
				compatible = "gpio-backlight";
				gpios = <&stmpe_gpio 2 0>;
				default-on;
			};
		};
	};

	__overrides__ {
		speed =   <&pitft>,"spi-max-frequency:0";
		rotate =  <&pitft>,"rotate:0";
		fps =     <&pitft>,"fps:0";
		debug =   <&pitft>,"debug:0";
	};
};