ARM: dts: r8a7742-iwg21d-q7: Add LCD support

The iwg21d comes with a 7" capacitive touch screen, therefore
add support for it.

Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Marian-Cristian Rotariu <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Geert Uytterhoeven <[e-mail]>

arch/arm/boot/dts/r8a7742-iwg21d-q7.dts

···
 
 /dts-v1/;
 #include "r8a7742-iwg21m.dtsi"
+#include <dt-bindings/pwm/pwm.h>
 
 / {
 	model = "iWave Systems RainboW-G21D-Qseven board based on RZ/G1H";
···
 		clock-frequency = <26000000>;
 	};
 
+	lcd_backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&tpu 2 5000000 0>;
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		pinctrl-0 = <&backlight_pins>;
+		pinctrl-names = "default";
+		default-brightness-level = <7>;
+		enable-gpios = <&gpio3 11 GPIO_ACTIVE_HIGH>;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
···
 			label = "sdio-led";
 			gpios = <&gpio5 22 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "mmc1";
+		};
+	};
+
+	lvds-receiver {
+		compatible = "ti,ds90cf384a", "lvds-decoder";
+		power-supply = <&vcc_3v3_tft1>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds_receiver_in: endpoint {
+					remote-endpoint = <&lvds0_out>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds_receiver_out: endpoint {
+					remote-endpoint = <&panel_in>;
+				};
+			};
+		};
+	};
+
+	panel {
+		compatible = "edt,etm0700g0dh6";
+		backlight = <&lcd_backlight>;
+		power-supply = <&vcc_3v3_tft1>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&lvds_receiver_out>;
+			};
 		};
 	};
 
···
 		sndcodec: simple-audio-card,codec {
 			sound-dai = <&sgtl5000>;
 		};
+	};
+
+	vcc_3v3_tft1: regulator-panel {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vcc-3v3-tft1";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		enable-active-high;
+		startup-delay-us = <500>;
+		gpio = <&gpio5 28 GPIO_ACTIVE_HIGH>;
 	};
 
 	vcc_sdhi2: regulator-vcc-sdhi2 {
···
 		VDDIO-supply = <&reg_3p3v>;
 		VDDD-supply = <&reg_1p5v>;
 	};
+
+	touch: touchpanel@38 {
+		compatible = "edt,edt-ft5406";
+		reg = <0x38>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <24 IRQ_TYPE_EDGE_FALLING>;
+		/* GP1_29 is also shared with audio codec reset pin */
+		reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
+		vcc-supply = <&vcc_3v3_tft1>;
+	};
 };
 
 &can1 {
···
 
 &cmt0 {
 	status = "okay";
+};
+
+&du {
+	status = "okay";
+};
+
+&gpio0 {
+	touch-interrupt {
+		gpio-hog;
+		gpios = <24 GPIO_ACTIVE_LOW>;
+		input;
+	};
 };
 
 &gpio1 {
···
 	pinctrl-0 = <&usb0_pins>;
 	pinctrl-names = "default";
 	status = "okay";
+};
+
+&lvds0 {
+	status = "okay";
+	ports {
+		port@1 {
+			lvds0_out: endpoint {
+				remote-endpoint = <&lvds_receiver_in>;
+			};
+		};
+	};
 };
 
 &msiof0 {
···
 	avb_pins: avb {
 		groups = "avb_mdio", "avb_gmii";
 		function = "avb";
+	};
+
+	backlight_pins: backlight {
+		groups = "tpu0_to2";
+		function = "tpu0";
 	};
 
 	can1_pins: can1 {
···
 
 &ssi4 {
 	shared-pin;
+};
+
+&tpu {
+	status = "okay";
 };
 
 &usbphy {