Jetson AGX Orin I2C-4

[Andyyyyy]

Hi，

I use I2C communication in my custom board,
I used i2c-4 to read and write to the MAX9611 chip, but there was a ‘Remote I/O Error’ while writing.
I use the ‘i2cdetect -l’ command to look up the i2c number and base address,
I2c-4 is found to be the Tegra BPMP I2C adapter. Does it cause read and write failures?

root@nvidia-agx-orin:/home/nvidia# i2cdetect -l
i2c-3   i2c             3190000.i2c                             I2C adapter
i2c-1   i2c             c240000.i2c                             I2C adapter
i2c-8   i2c             31e0000.i2c                             I2C adapter
i2c-6   i2c             31c0000.i2c                             I2C adapter
i2c-4   i2c             Tegra BPMP I2C adapter                  I2C adapter
i2c-2   i2c             3180000.i2c                             I2C adapter
i2c-0   i2c             3160000.i2c                             I2C adapter
i2c-9   i2c             NVIDIA SOC i2c adapter 0                I2C adapter
i2c-7   i2c             c250000.i2c                             I2C adapter
i2c-5   i2c             31b0000.i2c                             I2C adapter
root@nvidia-agx-orin:/home/nvidia# ^C

tegra234-soc-i2c.dtsi (7.5 KB)

[Andyyyyy]

This is still a problem that needs to be solved, I have added a custom carrier schematic in the forum.

[Trumany]

It’s I2C2 per your schematic.

[Andyyyyy]

Thank you very much. My mapping between the i2c pin and the nodes in the device tree was incorrect and the problem has been fixed