How to mount the video device if there is no I2C channel

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

If the video device does not have an I2C channel to control! It will initialize and send a fixed resolution,
But refer to other video equipments are all connected to i2C BUS to control

i2c@3180000 {ov5693_c@36 {

How to mount the video device if there is no I2C channel

3

You still can follow the reference sensor driver to remove all of the i2c REG accessing code for it.

4

but register device error
err = tegracam_device_register(tc_dev);
if (err) {
dev_err(dev, “tegra camera driver registration failed\n”);
return err;
}

see tegracam_core.c

int tegracam_device_register(struct tegracam_device *tc_dev)
{
…
s_data->regmap = devm_regmap_init_i2c(tc_dev->client,
tc_dev->dev_regmap_config);
if (IS_ERR(s_data->regmap)) {
dev_err(dev,
“regmap init failed: %ld\n”, PTR_ERR(s_data->regmap));

	return -ENODEV;
}

…

It seems that even this side has to be removed together

5

You only need to remove all the i2c REG accessing code to avoid physical i2c R/W and don’t remove all of the i2c things like i2c_client struct.

6

But there is no I2C device
How to implement it on dts?
How to mount the driver

i2c@3160000 {  /* I2C_PM, "adapter" 0 */
		i2c@0 {
				status = "okay";
				#address-cells = <1>;
				#size-cells = <0>;	

				compatible = "psm_amb_gen3_kcku15p";/* I2C device address */              
				reg = <0x30>;                     	/* shifted by 2 */
7

You can just mount to any I2C bus but don’t have driver to access that will be OK.

8

Same I2C BUS and address
Will the devices conflict?

9

You can change the slave address as any others to avoid conflict.

10

So just set a virtual address?
Can the driver be mounted?

11

Right
Yes