Brooklyn/arch/arm/boot/dts/overlays/rpi-display-overlay.dts

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

/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__ {
			rpi_display_pins: rpi_display_pins {
				brcm,pins = <18 23 24 25>;
				brcm,function = <1 1 1 0>; /* out out out in */
				brcm,pull = <0 0 0 2>; /* - - - up */
			};
		};
	};

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

			rpidisplay: rpi-display@0{
				compatible = "ilitek,ili9341";
				reg = <0>;
				pinctrl-names = "default";
				pinctrl-0 = <&rpi_display_pins>;

				spi-max-frequency = <32000000>;
				rotate = <270>;
				bgr;
				fps = <30>;
				buswidth = <8>;
				reset-gpios = <&gpio 23 1>;
				dc-gpios = <&gpio 24 0>;
				led-gpios = <&gpio 18 0>;
				debug = <0>;
			};

			rpidisplay_ts: 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 1>;
				ti,x-plate-ohms = /bits/ 16 <60>;
				ti,pressure-max = /bits/ 16 <255>;
			};
		};
	};

	fragment@10 {
		target = <&rpidisplay>;
		__dormant__  {
			backlight = <&backlight_gpio>;
		};
	};

	fragment@11 {
		target-path = "/";
		__dormant__  {
			backlight_gpio: backlight_gpio {
				compatible = "gpio-backlight";
				gpios = <&gpio 18 0>; /* GPIO_ACTIVE_HIGH */
			};
		};
	};

	fragment@20 {
		target = <&rpidisplay>;
		__dormant__  {
			backlight = <&backlight_pwm>;
		};
	};

	fragment@21 {
		target-path = "/";
		__dormant__  {
			backlight_pwm: backlight_pwm {
				compatible = "pwm-backlight";
				brightness-levels = <0 6 8 12 16 24 32 40 48 64 96 128 160 192 224 255>;
				default-brightness-level = <16>;
				pwms = <&pwm 0 200000>;
			};
		};
	};

	fragment@22 {
		target = <&pwm>;
		__dormant__ {
			assigned-clock-rates = <1000000>;
			status = "okay";
		};
	};

	fragment@23 {
		target = <&audio>;
		__dormant__  {
		    brcm,disable-headphones;
		};
	};

	__overrides__ {
		speed =     <&rpidisplay>,"spi-max-frequency:0";
		rotate =    <&rpidisplay>,"rotate:0", /* fbtft */
			    <&rpidisplay>,"rotation:0"; /* drm */
		fps =       <&rpidisplay>,"fps:0";
		debug =     <&rpidisplay>,"debug:0";
		xohms =     <&rpidisplay_ts>,"ti,x-plate-ohms;0";
		swapxy =    <&rpidisplay_ts>,"ti,swap-xy?";
		backlight = <&rpidisplay>,"led-gpios:4",
		            <&rpi_display_pins>,"brcm,pins:0";
		drm =       <&rpidisplay>, "compatible=multi-inno,mi0283qt",
			    <&rpidisplay>, "spi-max-frequency:0=70000000",
			    <&rpidisplay>, "reset-gpios:8=0", /* GPIO_ACTIVE_HIGH */
			    <0>, "+10+11";
		backlight-pwm = <0>, "-10-11+20+21+22+23",
				<&rpi_display_pins>, "brcm,function:0=2"; /* Alt5 */
	};
};