BBORG_DISPLAY18-00A2.txt

gistfile1.txt

/* Work in Progress */

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
#include <dt-bindings/board/am335x-bbw-bbb-base.h>

/dts-v1/;
/plugin/;

/ {

	/*
	 * Free up the pins used by the cape from the pinmux helpers.
	 */
	fragment@0 {
		target = <&ocp>;
		__overlay__ {
			P8_35_pinmux { status = "disabled"; };	/* LEDs - 1 */
			P8_37_pinmux { status = "disabled"; };	/* LEDs - 2 */
			P9_17_pinmux { status = "disabled"; }; 	/* LCD - CS */
			P9_22_pinmux { status = "disabled"; };	/* LCD - SCLK */
			P9_18_pinmux { status = "disabled"; };	/* LCD - MOSI? */
			P9_21_pinmux { status = "disabled"; };	/* LCD - MISO? */
			P8_33_pinmux { status = "disabled"; };	/* LCD - DC */
			P8_31_pinmux { status = "disabled"; };	/* LCD - RST */
			P8_29_pinmux { status = "disabled"; };	/* button - 1 */
			P8_27_pinmux { status = "disabled"; };	/* button - 2 */
			P8_30_pinmux { status = "disabled"; };	/* button - 3 */
	 		P8_28_pinmux { status = "disabled"; };	/* button - 4 */
			P9_12_pinmux { status = "disabled"; };	/* button - 5 */
			P8_08_pinmux { status = "disabled"; };	/* button - 6 */
			P8_07_pinmux { status = "disabled"; };	/* button - 7 */
			P8_43_pinmux { status = "disabled"; };	/* button - 8 */
		};
	};

	fragment@1 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			/* default state has all gpios released and mode set to SPI0 */
			bb_spi0_pins: pinmux_bb_spi0_pins {
				pinctrl-single,pins = <
					0x150 0x30	/* spi0_sclk.spi0_sclk, INPUT_PULLUP | MODE0 */
					0x154 0x30	/* spi0_d0.spi0_d0, INPUT_PULLUP | MODE0 */
					0x158 0x10	/* spi0_d1.spi0_d1, OUTPUT_PULLUP | MODE0 */
					0x15c 0x10	/* spi0_cs0.spi0_cs0, OUTPUT_PULLUP | MODE0 */
				>;
			};

		};
	};

	fragment@2 {
		target-path = "/";
		__overlay__ {

			bl_reg: backlight-regulator {
				compatible = "regulator-fixed";
				regulator-name = "backlight";
				regulator-always-on;
				regulator-boot-on;
			};

			/* backlight is set to GPIO */
			backlight_gpio: backlight_gpio {
				compatible = "gpio-backlight";
				gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
				// connect lcd lite pin to P8.9 which is gpio2[5]
			};

			
		};
	};

	fragment@3 {
		target = <&spi0>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;

			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_spi0_pins>;

			display@0{
				status = "okay";
				compatible = "jianda,jd-t18003-t01", "sitronix,st7735r";
				reg = <0>;
				spi-max-frequency = <16000000>;
				dc-gpios = <&gpio0 9 0>;      // lcd dc    P8.33 gpio0[9]
				reset-gpios = <&gpio0 10 0>;   // lcd reset P8.31 gpio0[10]
				backlight = <&backlight_gpio>; // lcd lite  P8.9 gpio2[69]
				// rotation is optional
				// rotation = <270>;
			};
		};
	};
};