gistfile1.txt

// SPDX-License-Identifier: GPL-2.0-only
/*
 * DT Overlay for RPi Camera V2.1 (Sony IMX219) interfaced with CSI0 on BBAI64 board.
 *
 * Copyright (C) 2022 Robert Nelson, BeagleBoard.org Foundation
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/k3.h>

/*
 * Helper to show loaded overlays under: /proc/device-tree/chosen/overlays/
 */
&{/chosen} {
	overlays {
		BBAI64-CSI0-imx219.kernel = __TIMESTAMP__;
	};
};

 / {
	fragment@101 {
		target-path = "/";

		__overlay__ {
			clk_imx219_fixed: imx219-xclk {
				compatible = "fixed-clock";
				#clock-cells = <0>;
				clock-frequency = <24000000>;
			};
		};
	};
};

/* CSI0 */
/* W29_CSI0_GPIO1 */
/* W27_CSI0_GPIO2 */
/* Y26_I2C5_SCL */
/* AA27_I2C5_SDA */

&main_pmx0 {
	main_i2c5_pins_default: main-i2c5-pins-default {
		pinctrl-single,pins = <
			J721E_IOPAD(0x150, PIN_INPUT_PULLUP, 2) /* (Y26) PRG0_MDIO0_MDIO.I2C5_SCL */
			J721E_IOPAD(0x154, PIN_INPUT_PULLUP, 2) /* (AA27) PRG0_MDIO0_MDC.I2C5_SDA */
		>;
	};

	csi0_gpio_pins_default: csi0-gpio-pins-default {
		pinctrl-single,pins = <
			//J721E_IOPAD(0x19c, PIN_OUTPUT, 7) /* (W27) RGMII6_TD0.GPIO0_102 */
			J721E_IOPAD(0x1a0, PIN_OUTPUT, 7) /* (W29) RGMII6_TXC.GPIO0_103 */
		>;
	};
};

/* CSI1 */
/* V25_CSI1_GPIO1 */
/* W24_CSI1_GPIO2 */
/* Y6_I2C1_SCL */
/* AA6_I2C1_SDA */

&main_i2c5 {
	pinctrl-names = "default";
	pinctrl-0 = <&main_i2c5_pins_default>;
	clock-frequency = <400000>;
    status = "okay";
    symlink = "bone/i2c/csi0";

	#address-cells = <1>;
	#size-cells = <0>;

	imx219: sensor@10 {
		status = "okay";
		compatible = "sony,imx219";
		reg = <0x10>;

		clocks = <&clk_imx219_fixed>;
		clock-names = "xclk";

		pinctrl-names = "default";
		pinctrl-0 = <&csi0_gpio_pins_default>;
		//reset-gpios = <&main_gpio0 102 GPIO_ACTIVE_HIGH>;
		reset-gpios = <&main_gpio0 103 GPIO_ACTIVE_HIGH>;

		port {
			csi2rx0_cam0: endpoint {
				remote-endpoint = <&csi2rx0_in_sensor>;
				link-frequencies = /bits/ 64 <456000000>;
				clock-lanes = <0>;
				data-lanes = <1 2>;
			};
		};
	};
};

&csi0_port0 {
    status = "okay";
	csi2rx0_in_sensor: endpoint {
		remote-endpoint = <&csi2rx0_cam0>;
		bus-type = <4>; /* CSI2 DPHY. */
		clock-lanes = <0>;
		data-lanes = <1 2>;
	};
};