From 96eae2d50c44c19cc718a115ac50243b2bc1e9da Mon Sep 17 00:00:00 2001
From: Oleg Kalachev <okalachev@gmail.com>
Date: Wed, 12 May 2021 08:54:38 +0300
Subject: [PATCH] image: build overlay for OV7251 camera on CAM0

---
 builder/assets/ov7251cam0-overlay.dts | 111 ++++++++++++++++++++++++++
 builder/image-hardware.sh             |   4 +
 2 files changed, 115 insertions(+)
 create mode 100644 builder/assets/ov7251cam0-overlay.dts

diff --git a/builder/assets/ov7251cam0-overlay.dts b/builder/assets/ov7251cam0-overlay.dts
new file mode 100644
index 00000000..7300095e
--- /dev/null
+++ b/builder/assets/ov7251cam0-overlay.dts
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for OV7251 camera module on VC I2C bus
+/dts-v1/;
+/plugin/;
+
+//#include <dt-bindings/gpio/gpio.h>
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2c_vc>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			ov7251: ov7251@60 {
+				compatible = "ovti,ov7251";
+				reg = <0x60>;
+				status = "okay";
+
+				clocks = <&ov7251_clk>;
+				clock-names = "xclk";
+				clock-frequency = <24000000>;
+
+				vdddo-supply = <&ov7251_dovdd>;
+				vdda-supply = <&ov7251_avdd>;
+				vddd-supply = <&ov7251_dvdd>;
+
+				enable-gpios = <&gpio 41 0>;
+
+				port {
+					ov7251_0: endpoint {
+						remote-endpoint = <&csi0_ep>;
+						clock-lanes = <0>;
+						data-lanes = <1>;
+						clock-noncontinuous;
+						link-frequencies =
+							/bits/ 64 <456000000>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&csi0>;
+		__overlay__ {
+			status = "okay";
+
+			port {
+				csi0_ep: endpoint {
+					remote-endpoint = <&ov7251_0>;
+					data-lanes = <1>;
+				};
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c0if>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@3 {
+		target-path="/";
+		__overlay__ {
+			ov7251_avdd: fixedregulator@0 {
+				compatible = "regulator-fixed";
+				regulator-name = "ov7251_avdd";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+			};
+			ov7251_dovdd: fixedregulator@1 {
+				compatible = "regulator-fixed";
+				regulator-name = "ov7251_dovdd";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+			ov7251_dvdd: fixedregulator@2 {
+				compatible = "regulator-fixed";
+				regulator-name = "ov7251_dvdd";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+			};
+			ov7251_clk: ov7251-clk {
+				compatible = "fixed-clock";
+				#clock-cells = <0>;
+				clock-frequency = <24000000>;
+			};
+		};
+	};
+
+	fragment@4 {
+		target = <&i2c0mux>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@5 {
+		target-path="/__overrides__";
+		__overlay__ {
+			cam0-pwdn-ctrl = <&ov7251>,"enable-gpios:0";
+			cam0-pwdn      = <&ov7251>,"enable-gpios:4";
+		};
+	};
+};
diff --git a/builder/image-hardware.sh b/builder/image-hardware.sh
index 6e497cc3..167324b9 100755
--- a/builder/image-hardware.sh
+++ b/builder/image-hardware.sh
@@ -1,3 +1,7 @@
 #! /usr/bin/env bash
 
 set -ex
+
+echo "Build overlay for OV7251 camera on CAM0"
+
+dtc -I dts -O dtb -o /boot/overlays/ov7251cam0.dtbo /home/pi/catkin_ws/src/clover/builder/assets/ov7251cam0-overlay.dts