How to change CAM_I2C to another I2C bus

Robotics & Edge Computing Jetson & Embedded Systems Jetson TK1
1

So I burnout CAM_I2C porn. Now I have always low level on SCL line (PIN 11 on J3A2). I already try make my own pullup with 1kOhm resistor, but line always low. I need to change i2c-2 bus to another, for example to i2c-0. Can some one tel my how can I do this?
I already try change bus number in device tree and “board-ardbeg-sensors.c” files, but nothing is changed.

2

hello Leon11t,

may i know had you re-worked your camera board to another i2c bus already ?
also, please share the diff of your device tree to let us confirm the modification.
thanks

3

I use camera board with breadboard wires, so I can connect camera board to jetson any way you like.

board-ardbeg-sensors.c

static struct soc_camera_link ov2710_iclink = {
	.bus_id		= 1, /* This must match the .id of tegra_vi01_device */
	.board_info	= &ardbeg_ov2710_camera_i2c_device,
	.module_name	= "ov2710_v4l2",
	.i2c_adapter_id	= 0,
	.power		= ardbeg_ov2710_power,
	.priv		= &ardbeg_ov2710_camera_platform_data,
};

tegra124-jetson_tk1-pmic-pm375-0000-c00-00.dtsi

as3722_ldo1: ldo1 {
				     regulator-name = "vdd-cam";
				     regulator-min-microvolt = <1800000>;
				     regulator-max-microvolt = <1800000>;
				     regulator-boot-on;

				     consumers {
					     c1 {
						     regulator-consumer-supply = "vddio_cam";
						     regulator-consumer-device = "vi";
					     };
					     c2 {
						     regulator-consumer-supply = "pwrdet_cam";

					     };
					     c3 {
						     regulator-consumer-supply = "vdd_cam_1v8_cam";
					     };
					     c4 {
						     regulator-consumer-supply = "vif";
						     regulator-consumer-device = "2-0010";
					     };
					     c5 {
						     regulator-consumer-supply = "vif";
						     regulator-consumer-device = "0-0036";
					     };
					     c6 {
						     regulator-consumer-supply = "vdd_i2c";
						     regulator-consumer-device = "2-000c";
					     };
					     c7 {
						     regulator-consumer-supply = "vdd_i2c";
						     regulator-consumer-device = "2-0010";
					     };
					     c8 {
						     regulator-consumer-supply = "vif";
						     regulator-consumer-device = "2-0018";
					     };
					     c9 {
						     regulator-consumer-supply = "vi2c";
						     regulator-consumer-device = "2-0030";
					     };
				     };
			     };

as3722_ldo4: ldo4 {
				     regulator-name = "avdd-cam";
				     regulator-min-microvolt = <3300000>;
				     regulator-max-microvolt = <3300000>;

				     consumers {
					     c1 {
						     regulator-consumer-supply = "vana";
						     regulator-consumer-device = "0-0036";
					     };
				     };
			     };

tegra124-pm359-camera-a00.dtsi

#include <dt-bindings/media/camera.h>

/ {
	camera-pcl {
		compatible = "nvidia,tegra124-camera", "simple-bus";
		configuration = <0xAA55AA55>;

		modules {
			module1: module1@modules {
				compatible = "sensor,rear";
				badge_info = "e1633_rear_camera";

				sensor {
					profile = <&ov2710_1>;
					platformdata = "ardbeg_ov2710_pdata";
				};
			};
		};
		profiles {
			ov2710_1: ov2710@0_0036 {
					index = <1>;
					chipname = "pcl_OV2710";
					type = "sensor";
					guid = "s_OV2710";
					position = <1>;
					bustype = "i2c";
					busnum = <0>;
					addr = <0x36>;
					datalen = <2>;
					pinmuxgrp = <0xFFFF>;
					gpios = <3>;
					regulators = "vana", "vif";
					clocks = "mclk2";
					drivername = "ov2710";
					detect = <0x0002 0x300A 0xFFFF 0x2710>;
					devid = <0x2710>;
					poweron = <
						CAMERA_IND_CLK_SET(10000)
						CAMERA_GPIO_CLR(221)
						CAMERA_REGULATOR_ON(0)
						CAMERA_REGULATOR_ON(1)
						CAMERA_WAITMS(40)
						CAMERA_GPIO_SET(221)
						CAMERA_WAITMS(10)
						CAMERA_END
						>;
					poweroff = <
						CAMERA_IND_CLK_CLR
						CAMERA_GPIO_CLR(221)
						CAMERA_WAITUS(10)
						CAMERA_REGULATOR_OFF(1)
						CAMERA_REGULATOR_OFF(0)
						CAMERA_END
						>;
				};
		};
	};
};
4

hi Leon11t,

i would suggest you to change the camera position as back camera since you has only 1 camera on board.
please have below modification first.

position = <0>;
clocks = "mclk";

after that, please adding some debug messages to confirm your sensor power_on sequence works correctly.
please share kernel message if you still not able to probe the camera sensor.

thanks,
Jerry