BBAI-4D4C-00A1.dts

/*
 * Copyright (C) 2020 Deepak Khatri <deepaklorkhatri7@gmail.com>
 * See Cape Interface Spec page for more info on Bone Buses
 * https://elinux.org/Beagleboard:BeagleBone_cape_interface_spec
 *
 * Overlay for 4D Systems GEN4-4DCAPE-43CT-CLB and similar Displays
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
 
/dts-v1/;
/plugin/;
 
&{/chosen} {
	overlays {
		BBAI-4D4C-00A1 = __TIMESTAMP__;
	};
};
 
/*
 * Update the default pinmux of the pins.
 * See these files for the phandles (&P9_* & &P8_*)
 * BeagleBoard-DeviceTrees/v4.19.x-ti-overlays/src/arm/am335x-bone-common-univ.dtsi
 * BeagleBoard-DeviceTrees/v4.19.x-ti-overlays/src/arm/am572x-bone-common-univ.dtsi
 */
&ocp {
	P8_45_pinmux { pinctrl-0 = <&P8_45_lcd_pin>;};	/* lcd: lcd_data0 */
	P8_46_pinmux { pinctrl-0 = <&P8_46_lcd_pin>;};	/* lcd: lcd_data1 */
	P8_43_pinmux { pinctrl-0 = <&P8_43_lcd_pin>;};	/* lcd: lcd_data2 */
	P8_44_pinmux { pinctrl-0 = <&P8_44_lcd_pin>;};	/* lcd: lcd_data3 */
	P8_41_pinmux { pinctrl-0 = <&P8_41_lcd_pin>;};	/* lcd: lcd_data4 */
	P8_42_pinmux { pinctrl-0 = <&P8_42_lcd_pin>;};	/* lcd: lcd_data5 */
	P8_39_pinmux { pinctrl-0 = <&P8_39_lcd_pin>;};	/* lcd: lcd_data6 */
	P8_40_pinmux { pinctrl-0 = <&P8_40_lcd_pin>;};	/* lcd: lcd_data7 */
	P8_37_pinmux { pinctrl-0 = <&P8_37_lcd_pin>;};	/* lcd: lcd_data8 */
	P8_38_pinmux { pinctrl-0 = <&P8_38_lcd_pin>;};	/* lcd: lcd_data9 */
	P8_36_pinmux { pinctrl-0 = <&P8_36_lcd_pin>;};	/* lcd: lcd_data10 */
	P8_34_pinmux { pinctrl-0 = <&P8_34_lcd_pin>;};	/* lcd: lcd_data11 */
	P8_35_pinmux { pinctrl-0 = <&P8_35_lcd_pin>;};	/* lcd: lcd_data12 */
	P8_33_pinmux { pinctrl-0 = <&P8_33_lcd_pin>;};	/* lcd: lcd_data13 */
	P8_31_pinmux { pinctrl-0 = <&P8_31_lcd_pin>;};	/* lcd: lcd_data14 */
	P8_32_pinmux { pinctrl-0 = <&P8_32_lcd_pin>;};	/* lcd: lcd_data15 */
 
	P8_27_pinmux { pinctrl-0 = <&P8_27_lcd_pin>;};	/* lcd: lcd_vsync */
	P8_29_pinmux { pinctrl-0 = <&P8_29_lcd_pin>;};	/* lcd: lcd_hsync */
	P8_28_pinmux { pinctrl-0 = <&P8_28_lcd_pin>;};	/* lcd: lcd_pclk */
	P8_30_pinmux { pinctrl-0 = <&P8_30_lcd_pin>;};	/* lcd: lcd_ac_bias_en */
 
	P9_27_pinmux { pinctrl-0 = <&P9_27_gpio_pin>;};	/* lcd: gpio4_15 DISPEN */
 
	P9_14_pinmux { pinctrl-0 = <&P9_14_pwm_pin>;};	/* pwm: ehrpwm1a PWM_BL */
 
	P9_18_pinmux { pinctrl-0 = <&P9_18_i2c_pin>;};	/* i2c1_sda */
	P9_17_pinmux { pinctrl-0 = <&P9_17_i2c_pin>;};	/* i2c1_scl */
	P9_26_pinmux { pinctrl-0 = <&P9_26_gpio_pin>;};	/* touch interrupt on gpio6_14 */
};

/*
 * See these files for the phandles (&bone_*) and other bone bus nodes
 * BeagleBoard-DeviceTrees/v4.19.x-ti-overlays/src/arm/bbai-bone-buses.dtsi
 * BeagleBoard-DeviceTrees/v4.19.x-ti-overlays/src/arm/bbb-bone-buses.dtsi
 */

// PWM Backlight
&bone_pwm_1{
	status = "okay";
};

// Touch Controller
&bone_i2c_1 {
	status = "okay";
	clock-frequency = <100000>;
	#address-cells = <1>;
	#size-cells = <0>;

	polytouch: edt-ft5x06@38 {
		compatible = "edt,edt-ft5x06";
		reg = <0x38>;
		interrupt-parent = <&gpio6>;
		interrupts = <14 2>;
		touchscreen-size-y = <480>;
		touchscreen-size-x = <272>;
		touchscreen-swapped-x-y;
	};
};

// Display Sub System (DSS)
&dss {
	ports {
		#address-cells = <1>;
		#size-cells = <0>;

		port {
			reg = <0>;

			dpi_out: endpoint {
				data-lines = <16>;
				remote-endpoint = <&lcd_in>;
			};
		};
	};
};

&{/} {
	aliases {
		display0 = &lcd0;
	};
	
	// Backlight
	lcd_bl: backlight {
		status = "okay";
		compatible = "pwm-backlight";
		pwms = <&bone_pwm_1 0 500000 0>;
		brightness-levels = <
			0  1  2  3  4  5  6  7  8  9
			10 11 12 13 14 15 16 17 18 19
			20 21 22 23 24 25 26 27 28 29
			30 31 32 33 34 35 36 37 38 39
			40 41 42 43 44 45 46 47 48 49
			50 51 52 53 54 55 56 57 58 59
			60 61 62 63 64 65 66 67 68 69
			70 71 72 73 74 75 76 77 78 79
			80 81 82 83 84 85 86 87 88 89
			90 91 92 93 94 95 96 97 98 99
			100
		>;
		default-brightness-level = <100>;
	};

	// Display
	lcd0: display {
		compatible = "qiaodian,qd43003c0-40", "panel-dpi";
		backlight = <&lcd_bl>;
		enable-gpios = <&gpio2 5 0>;
		label = "lcd";

		panel-info {
			ac-bias           = <255>;
			ac-bias-intrpt    = <0>;
			dma-burst-sz      = <16>;
			bpp               = <16>;
			fdd               = <0x80>;
			sync-edge         = <0>;
			sync-ctrl         = <1>;
			raster-order      = <0>;
			fifo-th           = <0>;
		};

		panel-timing {
			clock-frequency = <9200000>;
			hactive = <480>;
			vactive = <272>;
			hfront-porch = <8>;
			hback-porch = <47>;
			hsync-len = <41>;
			vback-porch = <2>;
			vfront-porch = <3>;
			vsync-len = <10>;
			hsync-active = <0>;
			vsync-active = <0>;
			de-active = <1>;
			pixelclk-active = <0>;
		};

		port {
			lcd_in: endpoint {
				remote-endpoint = <&dpi_out>;
			};
		};
	};
};