Brooklyn/arch/arm/boot/dts/overlays/hy28a-overlay.dts

/*
 * Device Tree overlay for HY28A display
 *
 */

/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__ {
			hy28a_pins: hy28a_pins {
				brcm,pins = <17 25 18>;
				brcm,function = <0 1 1>; /* in out out */
			};
		};
	};

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

			hy28a: hy28a@0{
				compatible = "ilitek,ili9320";
				reg = <0>;
				pinctrl-names = "default";
				pinctrl-0 = <&hy28a_pins>;

				spi-max-frequency = <32000000>;
				spi-cpol;
				spi-cpha;
				rotate = <270>;
				bgr;
				fps = <50>;
				buswidth = <8>;
				startbyte = <0x70>;
				reset-gpios = <&gpio 25 1>;
				led-gpios = <&gpio 18 1>;
				debug = <0>;
			};

			hy28a_ts: hy28a-ts@1 {
				compatible = "ti,ads7846";
				reg = <1>;

				spi-max-frequency = <2000000>;
				interrupts = <17 2>; /* high-to-low edge triggered */
				interrupt-parent = <&gpio>;
				pendown-gpio = <&gpio 17 0>;
				ti,x-plate-ohms = /bits/ 16 <100>;
				ti,pressure-max = /bits/ 16 <255>;
			};
		};
	};
	__overrides__ {
		speed =		<&hy28a>,"spi-max-frequency:0";
		rotate =	<&hy28a>,"rotate:0";
		fps =		<&hy28a>,"fps:0";
		debug =		<&hy28a>,"debug:0";
		xohms =		<&hy28a_ts>,"ti,x-plate-ohms;0";
		resetgpio =	<&hy28a>,"reset-gpios:4",
				<&hy28a_pins>, "brcm,pins:4";
		ledgpio =	<&hy28a>,"led-gpios:4",
				<&hy28a_pins>, "brcm,pins:8";
	};
};