JETSON NANO I2C 0x41 Error "tegra-i2c 7000c400.i2c: no acknowledge from address 0x41"

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

In Booting we can see I2C Error, So How can we solve it?

[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.9.253 (root@shpark-B80GV-AP07BKE) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05) ) #14 SMP PREEMPT Wed Jul 13 15:05:22 KST 2022
[ 0.000000] Boot CPU: AArch64 Processor [411fd071]
[ 0.000000] OF: fdt:memory scan node memory@80000000, reg size 32,
[ 0.000000] OF: fdt: - 80000000 , 7ee00000
[ 0.000000] OF: fdt: - 100000000 , 7f200000
[ 0.000000] earlycon: uart8250 at MMIO32 0x0000000070006000 (options ‘’)
[ 0.000000] bootconsole [uart8250] enabled
[ 1.069890] tegradc tegradc.1: dpd enable lookup fail:-19
[ 1.575834] Host read timeout at address 545c00c4
[ 1.765634] imx219 7-0010: imx219_board_setup: error during i2c read probe (-121)
[ 1.773288] imx219 7-0010: board setup failed
[ 1.801717] imx219 8-0010: imx219_board_setup: error during i2c read probe (-121)
[ 1.809286] imx219 8-0010: board setup failed

[ 3.862299] ser_console: loading out-of-tree module taints kernel.
[ 4.025237] random: crng init done
[ 4.028641] random: 7 urandom warning(s) missed due to ratelimiting
[ 4.205459] using random self ethernet address
[ 4.224550] using random host ethernet address

[ 5.080814] tegra-i2c 7000c400.i2c: no acknowledge from address 0x41
[ 5.087620] tegra-i2c 7000c400.i2c: no acknowledge from address 0x41

we use “Nvidia Netson Nano Module”
S/N:142092294303

2

Issue happened on your custom carrier board or dev?
Which JetPack version>

4

hello csocom,

i2c no acknowledge failure usually due to i2c communication without correct regulator settings.
are you using Nano developer kit, or you’re having customize carrier board?

5

We use Custom Board.

6

We use custom board.

7

Jet Pack Version is

jetson-210/R32.7.2

8

hello csocom,

please check Jetson Nano Product Design Guide and review your board,
you should given correct regulator settings to resolve i2c no acknowledge failures.

9

Our Solutions: Jetson Nano Module(16GB)+ Custom Board.

We research file <Jetson_Nano_Product_Design_Guide_DG-09502-001_v2.3.pdf>.

https://docs-download.oss-cn-shanghai.aliyuncs.com/厂商资料/英伟达/英伟达硬件/Jetson%20Nano-Z/Jetson%20Nano-Z%20Product%20Design%20Guide%20DG-09502-001v2.1.pdf](chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://docs-download.oss-cn-shanghai.aliyuncs.com/厂商资料/英伟达/英伟达硬件/Jetson%20Nano-Z/Jetson%20Nano-Z%20Product%20Design%20Guide%20DG-09502-001v2.1.pdf)

BUT Note:
**CAM_I2C interface is connected to the power monitor device on the module which uses I2C address 7’h40. 0x40

We can’t find out " 0x41 I2C address".

is it shifted I2C address ? (0x41 << 1) ------> 0x82

10

hello csocom,

it might be hardware monitor, INA3221, which use I2C addresses. 0x40 - 0x43
please review your device tree settings, such as ina3221x@41, you should modify that DT properties according to your product design.

11

Dear JerryChang ! Thanks for your Reply.

I have Questions

  1. Our Custom Board PCB don’t have “INA3221 IC”, so we want to no use it.
    we don’t want to control I2C ( 0x41, INA3221), so we will disable to “0x41 I2C” in the SW Jetpack linux program, is it Right?

  2. Does it exist INA3221- IC(0x41) on Jetson Nano Module ?
    I know Only 1EA, INA3221-IC(0x40) on Jetson Nano Module ----> Product Design Guide.pdf

12

hello csocom,

please update the device tree to remove 0x41 accordingly.

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