dtoverlays: Add overlay for ams Mira220 image sensor

Adds an overlay for the Mira220 1600x1400 global
shutter image sensor

Signed-off-by: philippe baetens <[email protected]>

Author: philippe baetens

arch/arm/boot/dts/overlays/Makefile

@@ -186,6 +186,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	minipitft13.dtbo \
 	miniuart-bt.dtbo \
 	mipi-dbi-spi.dtbo \
+	mira220.dtbo \
 	mlx90640.dtbo \
 	mmc.dtbo \
 	mz61581.dtbo \

arch/arm/boot/dts/overlays/README

@@ -3511,6 +3511,21 @@ Params:
                                 (default 16).
 
 
+Name:   mira220
+Info:   ams mira220 camera module.
+        Uses Unicam 1, which is the standard camera connector on most Pi
+        variants.
+Load:   dtoverlay=mira220,<param>=<val>
+Params: rotation                Mounting rotation of the camera sensor (0 or
+                                180, default 0)
+        orientation             Sensor orientation (0 = front, 1 = rear,
+                                2 = external, default external)
+        media-controller        Configure use of Media Controller API for
+                                configuring the sensor (default on)
+        cam0                    Adopt the default configuration for CAM0 on a
+                                Compute Module (CSI0, i2c_vc, and cam0_reg).
+
+
 Name:   mlx90640
 Info:   Overlay for i2c connected mlx90640 thermal camera
 Load:   dtoverlay=mlx90640

arch/arm/boot/dts/overlays/mira220-overlay.dts

@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for MIRA220 camera module on VC I2C bus
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2c0if>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	clk_frag: fragment@1 {
+		target = <&cam1_clk>;
+		__overlay__ {
+			status = "okay";
+			clock-frequency = <38400000>;
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c0mux>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	i2c_frag: fragment@100 {
+		target = <&i2c_csi_dsi>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			#include "mira220.dtsi"
+
+		};
+	};
+
+	csi_frag: fragment@101 {
+		target = <&csi1>;
+		csi: __overlay__ {
+			status = "okay";
+
+			port {
+				csi_ep: endpoint {
+					remote-endpoint = <&cam_endpoint>;
+					clock-lanes = <0>;
+					data-lanes = <1 2>;
+					// clock-noncontinuous; // mira220 use cont clk
+				};
+			};
+		};
+	};
+
+	fragment@102 {
+		target = <&csi1>;
+		__dormant__ {
+			compatible = "brcm,bcm2835-unicam-legacy";
+		};
+	};
+
+
+	__overrides__ {
+		rotation = <&cam_node>,"rotation:0";
+		orientation = <&cam_node>,"orientation:0";
+		media-controller = <0>,"!102";
+		cam0 = <&i2c_frag>, "target:0=",<&i2c_csi_dsi0>,
+		       <&csi_frag>, "target:0=",<&csi0>,
+		       <&clk_frag>, "target:0=",<&cam0_clk>,
+		       <&cam_node>, "clocks:0=",<&cam0_clk>,
+		       <&cam_node>, "vana-supply:0=",<&cam0_reg>;
+	};
+};
+
+&cam_node {
+	status = "okay";
+};
+
+&cam_endpoint {
+	remote-endpoint = <&csi_ep>;
+};

arch/arm/boot/dts/overlays/mira220.dtsi

@@ -0,0 +1,27 @@
+// Fragment that configures an mira220
+
+cam_node: mira220@10 {
+	compatible = "ams,mira220";
+	reg = <0x54>;
+	status = "disabled";
+
+	clocks = <&cam1_clk>;
+	clock-names = "xclk";
+
+	vana-supply = <&cam1_reg>;	/* 2.8v */
+	vdig-supply = <&cam_dummy_reg>;	/* 1.8v */
+	vddl-supply = <&cam_dummy_reg>;	/* 1.2v */
+
+	rotation = <0>;
+	orientation = <2>;
+
+	port {
+		cam_endpoint: endpoint {
+			clock-lanes = <0>;
+			data-lanes = <1 2>;
+			// clock-noncontinuous;
+			link-frequencies =
+				/bits/ 64 <750000000>;
+		};
+	};
+};