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

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

Author: Alessandro Pecugi

arch/arm/boot/dts/overlays/Makefile

@@ -238,6 +238,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	rootmaster.dtbo \
 	rotary-encoder.dtbo \
 	rpi-backlight.dtbo \
+	pivision.dtbo \
 	rpi-codeczero.dtbo \
 	rpi-dacplus.dtbo \
 	rpi-dacpro.dtbo \

arch/arm/boot/dts/overlays/README

@@ -4054,6 +4054,13 @@ 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 = "pericom,pi4ioe5v6408";
+                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 = "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";
+        };
+    };
+};