Does i2c-2 and i2c-9 use the same addr on Jetson NX?

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
1

Hello,
Does i2c-2 and i2c-9 use the same addr on Jetson NX?

Thanks.

3

There’s no i2c9, below is the i2c list.

                i2c0 = "/i2c@3160000";
                i2c1 = "/i2c@c240000";
                i2c2 = "/i2c@3180000";
                i2c3 = "/i2c@3190000";
                i2c4 = "/bpmp_i2c";
                i2c5 = "/i2c@31b0000";
                i2c6 = "/i2c@31c0000";
                i2c7 = "/i2c@c250000";
                i2c8 = "/i2c@31e0000";
4

Hi,
This is i2cdetect result,

nvidia@nvidia:~$ sudo 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 i2c-2-mux (chan_id 0) I2C adapter
i2c-7 i2c c250000.i2c I2C adapter
i2c-5 i2c 31b0000.i2c I2C adapter

5

OK, I check to the wrong version DT.
Current the i2c9 is i2c@31e0000 different with i2c2

6

Hi,
Which doc can I find the i2c/uart/spi etc. addr map?

7

Check the dtb file, you can using dtc to un-compile the dtb to dts then you can find it.