Pca954x probe failed on Jetson AGX Orin

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
1

Hello,
I have just faced with a problem working with a Jetson AGX Orin Developer Kit, P3737 carrier borad, LI-JAG-ADP-GMSL2-8CH GMSL2 board and ar0234 sensors. Jetpack version is 36.3, built from sources with no changes. tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dts is selected as a DTS overlay. I have this logs during the boot process:

[    4.148089] serial-tegra 3100000.serial: TX in PIO mode
[    4.148147] 3100000.serial: ttyTHS1 at MMIO 0x3100000 (irq = 112, base_baud = 0) is a TEGRA_UART
[    4.148630] serial-tegra 3110000.serial: RX in PIO mode
[    4.148634] serial-tegra 3110000.serial: TX in PIO mode
[    4.148669] 3110000.serial: ttyTHS2 at MMIO 0x3110000 (irq = 207, base_baud = 0) is a TEGRA_UART
[    4.150970] tegra_rtc c2a0000.rtc: registered as rtc1
[    4.150980] tegra_rtc c2a0000.rtc: Tegra internal Real Time Clock
[    4.151430] tegra-i2c 3160000.i2c: Adding to iommu group 1
[    4.156861] tegra-i2c 3180000.i2c: Adding to iommu group 1
[    4.166582] pca954x 2-0070: probe failed
[    4.167514] tegra-i2c 3190000.i2c: Adding to iommu group 1
[    4.173590] tegra-i2c 31b0000.i2c: Adding to iommu group 1
[    4.181390] tegra-i2c 31c0000.i2c: Adding to iommu group 1
[    4.186189] tegra-i2c 31e0000.i2c: Adding to iommu group 1
[    4.192651] tegra-i2c c240000.i2c: Adding to iommu group 1
[    4.199606] tegra-i2c c250000.i2c: Adding to iommu group 1
[    4.236639] cpufreq: cpufreq_online: CPU4: Running at unlisted initial frequency: 2009000 KHz, changing to: 2035200 KHz
[    4.240695] cpufreq: cpufreq_online: CPU8: Running at unlisted initial frequency: 2008000 KHz, changing to: 2035200 KHz
[    4.243907] sdhci-tegra 3460000.mmc: Adding to iommu group 2
[    4.244968] sdhci-tegra 3400000.mmc: Adding to iommu group 3

Seems like something went wrong with PCA954x i2c multiplexer initialization and it might be a reason why I can not see any signs of max96712 and ar0234 modules probes.
Can anybody helps me with that, are there any reasons why pca954x probe can fails?

3

@SimonZhu
May I have your comment for the driver device tree for the “LI-JAG-ADP-GMSL2-8CH GMSL2” for r36.3 release.

Thanks

4

Hello,
So, now I use tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dtsand all other out-of-shelf DTSs from the Jetpack with no modifications. From my perspective it should at least initializes pca954x and try to probe max96712 driver. Please correct me if I am wrong.

5

Suppose yes,
Could you check the pca954x by i2cdetect utility.

6

Sure,
Here is i2cdetect -l output:

image
image692×204 29.1 KB

If I got it right, according to the tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dts pca954x should be present on the i2c-2 (3180000.i2c) bus so here is sudo i2cdetect -y -r 2 output:
image
Seems like there is no a pca954x here or I did something wrong.

7

Right, looks like can’t detect the pca954x.
Maybe confirm with vendor for the HW design.

8

But it’s original Nvidia Jetson AGX Orin Developer Kit with no hardware changes.

9

I mean the camera board.

10

But shouldn’t pca954x be installed on a Jetson AGX Orin board?

11

I checked LI-JAG-ADP-GMSL2-8CH GMSL2 board and AGX Orin Carrier Board schematics and there is no pca954x there, so my only guess that it is placed on the main Jetson board. Unfortunately I couldn’t find schematics for it.

12

It should on the camera board.
If LI-JAG-ADP-GMSL2-8CH GMSL2 board don’t have it suppose the dts shouldn’t for this board.

13

There is no pca954x on both LI-JAG-ADP-GMSL2-8CH GMSL2 board and Orin dev kit. So it should not detect the pca954x.

15

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