Brooklyn/arch/arm/boot/dts/overlays/adafruit-st7735r-overlay.dts

/*
 * adafruit-st7735r-overlay.dts
 *
 * ST7735R based SPI LCD displays. Either
 * Adafruit 1.8" 160x128
 *   or
 * Okaya 1.44" 128x128
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target = <&spidev0>;
		__overlay__ {
			status = "disabled";
		};
	};

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

	fragment@2 {
		target-path = "/";
		__overlay__ {
			af18_backlight: backlight {
				compatible = "gpio-backlight";
				gpios = <&gpio 18 GPIO_ACTIVE_HIGH>;
				pinctrl-names = "default";
				pinctrl-0 = <&backlight_pins>;
			};
		};
	};

	fragment@3 {
		target = <&spi0>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			af18: adafruit18@0 {
				compatible = "jianda,jd-t18003-t01";
				reg = <0>;
				spi-max-frequency = <32000000>;
				dc-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
				reset-gpios = <&gpio 25 GPIO_ACTIVE_HIGH>;
				rotate = <90>;
				pinctrl-names = "default";
				pinctrl-0 = <&adafruit_pins>;
				backlight = <&af18_backlight>;
			};
		};
	};

	__overrides__ {
		128x128 = <&af18>, "compatible=okaya,rh128128t";
		speed = <&af18>,"spi-max-frequency:0";
		rotate = <&af18>,"rotate:0";
		dc_pin = <&af18>,"dc-gpios:4", <&adafruit_pins>,"brcm,pins:4";
		reset_pin = <&af18>,"reset-gpios:4",
			    <&adafruit_pins>,"brcm,pins:0";
		led_pin = <&af18_backlight>,"gpios:4",
			  <&backlight_pins>,"brcm,pins:0";
	};
};