Help Configuring TCA9548 I2C Multiplexer and DS75LX Thermometer on Orin Nano (R36.3 Kernel)

[fhardy]

Hi everyone,

I am working on integrating a Texas Instruments TCA9548 I2C multiplexer with the NVIDIA Orin Nano (8GB version) running the R36.3 kernel. The TCA9548 is connected to the Nano’s I2C1 bus and will interface with multiple I2C client devices.

To start, I plan to integrate a simple thermometer (DS75LX) as the first client device. I would like guidance on the following:

Which device tree files need to be modified to configure the TCA9548 multiplexer on the I2C1 bus.
The correct settings for the device tree to enable communication with the multiplexer.

I understand that client device driver support may not be available at this stage. My immediate goal is to set up basic I2C read/write operations with the DS75LX, as I believe getting this initial configuration right will pave the way for integrating additional client devices.

Any advice, resources, or example configurations would be greatly appreciated!

Thank you,
Fred Hardy

[ShaneCCC]

I would suggest consult with vendor to get the driver.

Thanks

[fhardy]

Shane, not looking for driver. Just device tree configuration with i2c1. thanks

[ShaneCCC]

You should know how the kernel device tree work first.

https://docs.kernel.org/devicetree/usage-model.html