How to add TCA9539 hardware information to the device tree

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello everyone,
I want to install an I2C chip TCA9539 in Nano (like the TCA9539 on TX2) as an IO extension.
I mounted the I2C chip to the Nano’s I2C bus 0, which is the 27th (I2C_1_SDA) and 28 (I2C_1_SCL) pins on the J40 Expansion Header. Others have 3.3v supply and GND. We refer to NVIDIA Jetson Nano J41 Header Pinout - JetsonHacks.
When I started Nano, the system did not find the I2C device.

sudo i2cdetect -y -r 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Do I need to modify the device tree? Thank you for your reply.

2

No need DT define for scanning.
You may need to probe the signal to confirm.