From dabd32c62cb2faa42feacafc6edbe8ab4b3395cb Mon Sep 17 00:00:00 2001
From: Penk Chen <penk@cutiepi.io>
Date: Mon, 20 Dec 2021 03:46:26 +0900
Subject: [PATCH] Add panel overlay for CutiePi

Signed-off-by: Penk Chen <penk@cutiepi.io>
---
 arch/arm/boot/dts/overlays/Makefile           |   1 +
 arch/arm/boot/dts/overlays/README             |   6 +
 .../dts/overlays/cutiepi-panel-overlay.dts    | 117 ++++++++++++++++++
 arch/arm/boot/dts/overlays/overlay_map.dts    |   4 +
 4 files changed, 128 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/cutiepi-panel-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -34,6 +34,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	cap1106.dtbo \
 	chipdip-dac.dtbo \
 	cma.dtbo \
+	cutiepi-panel.dtbo \
 	dht11.dtbo \
 	dionaudio-loco.dtbo \
 	dionaudio-loco-v2.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -679,6 +679,12 @@ Params: cma-512                 CMA is 5
         cma-default             Use upstream's default value
 
 
+Name:   cutiepi-panel
+Info:   8" TFT LCD display and touch panel used by cutiepi.io
+Load:   dtoverlay=cutiepi-panel
+Params: <None>
+
+
 Name:   dht11
 Info:   Overlay for the DHT11/DHT21/DHT22 humidity/temperature sensors
         Also sometimes found with the part number(s) AM230x.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/cutiepi-panel-overlay.dts
@@ -0,0 +1,117 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "brcm,bcm2711";
+
+    fragment@0 {
+        target=<&dsi1>;
+
+        __overlay__ {
+            status = "okay";
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port {
+                dsi1_out_port: endpoint {
+                    remote-endpoint = <&panel_dsi_in1>;
+                };
+            };
+
+            display1: panel@0 {
+                compatible = "nwe,nwe080";
+                reg=<0>;
+                backlight = <&rpi_backlight>;
+                reset-gpios = <&gpio 20 0>;
+                port {
+                    panel_dsi_in1: endpoint {
+                        remote-endpoint = <&dsi1_out_port>;
+                    };
+                };
+            };
+        };
+    };
+
+    fragment@1 {
+        target = <&gpio>;
+        __overlay__ {
+            pwm_pins: pwm_pins {
+                brcm,pins = <12>;
+                brcm,function = <4>; // ALT0
+            };
+        };
+    };
+
+    fragment@2 {
+        target = <&pwm>;
+        frag1: __overlay__ {
+            pinctrl-names = "default";
+            pinctrl-0 = <&pwm_pins>;
+            assigned-clock-rates = <1000000>;
+            status = "okay";
+        };
+    };
+
+    fragment@3 {
+        target-path = "/";
+        __overlay__ {
+            rpi_backlight: rpi_backlight {
+                compatible = "pwm-backlight";
+                brightness-levels = <0 6 8 12 16 24 32 40 48 64 96 128 160 192 224 255>;
+                default-brightness-level = <6>;
+                pwms = <&pwm 0 200000>;
+                power-supply = <&vdd_3v3_reg>;
+                status = "okay";
+            };
+        };
+    };
+
+    fragment@4 {
+        target = <&i2c6>;
+        frag0: __overlay__ {
+            status = "okay";
+            pinctrl-names = "default";
+            pinctrl-0 = <&i2c6_pins>;
+            clock-frequency = <100000>;
+        };
+    };
+
+    fragment@5 {
+        target = <&i2c6_pins>;
+        __overlay__ {
+            brcm,pins = <22 23>;
+        };
+    };
+
+    fragment@6 {
+            target = <&gpio>;
+            __overlay__ {
+                goodix_pins: goodix_pins {
+                    brcm,pins = <21 26>; // interrupt and reset
+                    brcm,function = <0 0>; // in
+                    brcm,pull = <2 2>; // pull-up
+                };
+            };
+    };
+
+    fragment@7 {
+        target = <&i2c6>;
+        __overlay__ {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            status = "okay";
+
+            gt9xx: gt9xx@5d {
+                compatible = "goodix,gt9271"; 
+                reg = <0x5D>;
+                pinctrl-names = "default";
+                pinctrl-0 = <&goodix_pins>;
+                interrupt-parent = <&gpio>;
+                interrupts = <21 2>; // high-to-low edge triggered
+                irq-gpios = <&gpio 21 0>; 
+                reset-gpios = <&gpio 26 0>;
+            };
+        };
+    };
+};
--- a/arch/arm/boot/dts/overlays/overlay_map.dts
+++ b/arch/arm/boot/dts/overlays/overlay_map.dts
@@ -5,6 +5,10 @@
 		deprecated = "use i2c-sensor,bmp085";
 	};
 
+	cutiepi-panel {
+		bcm2711;
+	};
+
 	highperi {
 		bcm2711;
 	};