dtoverlays: add overlay for Pi Vision

Add overlay for SECO Pi Vision adapter HAT, with the
sn65dsi83 LVDS bridge, a 10.1-inch LVDS panel, and Atmel
mxt touch controller

For the pi4ioe5v6408 GPIO expander, the equivalent fxl6408 driver
is used.

Signed-off-by: Alessandro Pecugi <[email protected]>

Author: Alessandro Pecugi

arch/arm/boot/dts/overlays/Makefile

@@ -222,6 +222,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	pitft28-capacitive.dtbo \
 	pitft28-resistive.dtbo \
 	pitft35-resistive.dtbo \
+	pivision.dtbo \
 	pps-gpio.dtbo \
 	proto-codec.dtbo \
 	pwm.dtbo \

arch/arm/boot/dts/overlays/README

@@ -4058,6 +4058,13 @@ Params: speed                   Display SPI bus speed
         touch-swapxy            Touchscreen swapped x y axis
 
 
+Name:   pivision
+Info:   Overlay to enable the SECO Pi Vision 10.1 HMI hardware for Compute Module 5.
+        Will be loaded automatically by up-to-date firmware via EEPROM detection.
+Load:   dtoverlay=pivision
+Params: <None>
+
+
 Name:   pps-gpio
 Info:   Configures the pps-gpio (pulse-per-second time signal via GPIO).
 Load:   dtoverlay=pps-gpio,<param>=<val>

arch/arm/boot/dts/overlays/pivision-overlay.dts

@@ -0,0 +1,155 @@
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2712";
+
+	fragment@0 {
+		target = <&i2c_csi_dsi0>;
+		__overlay__ {
+			status = "okay";
+			pi4io: pi4io@44 {
+				compatible = "fcs,fxl6408";
+				reg = <0x44>;
+				gpio-controller;
+				#gpio-cells = <2>;
+				status = "okay";
+			};
+
+			sn65dsi83: bridge@2c {
+				compatible = "ti,sn65dsi83";
+				reg = <0x2c>;
+				status = "okay";
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+
+						in_dsi: endpoint {
+							remote-endpoint = <&dsi_out>;
+							data-lanes = <1 2 3 4>;
+						};
+					};
+
+					port@2 {
+						reg = <2>;
+
+						lvds_out: endpoint {
+							remote-endpoint = <&in_lvds>;
+						};
+					};
+				};
+			};
+
+			mxt1066td: touch@4a {
+				compatible = "atmel,maxtouch";
+				reg = <0x4a>;
+				interrupt-parent = <&rp1_gpio>;
+				interrupts = <34 IRQ_TYPE_EDGE_FALLING>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&rp1_gpio_34>;
+				reset-gpios = <&pi4io 1 GPIO_ACTIVE_LOW>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&dsi0>;
+		__overlay__{
+			status = "okay";
+			port {
+				dsi_out: endpoint {
+					remote-endpoint = <&in_dsi>;
+				};
+			};
+		};
+	};
+
+	fragment@2 {
+		target-path = "/";
+		__overlay__ {
+			panel: panel {
+				compatible = "auo,g101ean02-2", "panel-lvds";
+				width-mm = <217>;
+				height-mm = <136>;
+				data-mapping = "vesa-24";
+				backlight = <&backlight>;
+				status = "okay";
+
+				panel-timing {
+					clock-frequency = <71100000>;
+					hactive = <1280>;
+					vactive = <800>;
+					hfront-porch = <50>;
+					hsync-len = <60>;
+					hback-porch = <50>;
+					vfront-porch = <7>;
+					vsync-len = <9>;
+					vback-porch = <7>;
+				};
+
+				port {
+					in_lvds: endpoint {
+						remote-endpoint = <&lvds_out>;
+					};
+				};
+			};
+
+			display_enable: display_enable {
+				compatible = "regulator-fixed";
+				regulator-name = "display_enable";
+				regulator-always-on;
+				enable-active-high;
+				gpio = <&pi4io 0 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+
+			backlight: backlight {
+				compatible = "pwm-backlight";
+				pwms = <&pwm1 0 5000000 0>;
+				brightness-levels = <0 65535>;
+				num-interpolated-steps = <4096>;
+				default-brightness-level = <3000>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@3 {
+		target = <&rp1_gpio>;
+		__overlay__ {
+			rp1_gpio_34: rp1_gpio_34 {
+				function = "gpio";
+				pins = "gpio34";
+				bias-pull-up;
+			};
+			rp1_gpio_35: rp1_gpio_35 {
+				function = "pwm1";
+				pins = "gpio35";
+			};
+		};
+	};
+
+	fragment@4 {
+		target = <&cam0_reg>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@5 {
+		target = <&pwm1>;
+		__overlay__ {
+			pinctrl-names = "default";
+			pinctrl-0 = <&rp1_gpio_35>;
+			status = "okay";
+		};
+	};
+};