LAN7430 compatibility

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi,
I need help with the LAN7430 chip. I have Jetson nano baseboard and I would like to use my own card with key E connector.

So… why this IC. Because of price, and future compatibility with PCIe 3.1 devices, also we hope in long term support

Yesterday I backported the driver for LAN7430 to the kernel 4.9.140 that Jetson uses (because support for this IC is as i know from kernel 5.0). I am able to compile and load the image into jetson, device normally boot as always.
I can see driver and module in /lib/modules/4.9.140-tegra/kernel/drivers/net/ethernet/microchip as lan743x.ko.

If i use command zcat /proc/config.gz
i can found see this line: CONFIG_NA743x=y

Unfortunately I don’t see anything with use lspci -vv except NVIDIA Bridge and Realtek ETH, dmesg is also clean.

We are using this schematic copied 1:1 (without EEPROM side):

My opinion is this must work. I have Intel wifi card for KEY E and it works fine. So i checked Intel pinout and compare it to pinout on my card. No differences.
All voltages are correct, clock is ok, so I’m very tired at this moment and i found this thread as my last chance to know something new, what can help me.

I will be glad for any tips.
Best regards,
Ales Ryska

3

Hi,

  1. Please share dmesg and lspci output.
  2. In schematics I see that “PCIe edge connector” is designed as PCIe CEM gold finger connector. Which M.2 to CEM adapter are you using here?
  3. Please verify multiple known PCIe AIC + “M.2 to CEM adapter” on Jetson Nano.
    - This is to ensure that “M.2 to CEM adapter” works fine.
  4. Please verify LAN7430 card + “M.2 to CEM adapter” on any x86 host machine.
    - This is to ensure that LAN7430 card works fine with “M.2 to CEM adapter”.

Thanks,
Manikanta

4

Hi,
lspci:
00:02.0 PCI bridge: NVIDIA Corporation Device 0faf (rev a1)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

dmesg

We are using PCIe, KEY-E pinout on custom card (which uses most of nvme wifi cards).

For adapter and other thing for verify on x86 i mus wait few days.

Best regards,
Ales Ryska

5

Hi,

I am not able to access link [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux v - Pastebin.com.

We are using PCIe, KEY-E pinout on custom card (which uses most of nvme wifi cards).

I don’t understand this setup completely. Can you list down all the components/boards involved and their connections. If possible attach the picture of the setup.

In lspci output I don’t see LAN7430, so PCIe link up failed. For link up, we need PERST#, REFCLK differential pair signals. Have you checked if these signals are reaching to LAN7430?

Let me know once you verify this setup on x86.

Thanks,
Manikanta

7

does it works?

8

Hi, Do you mind to share how to port the driver from the newer linux kernel to 4.9 Tegra? I am also using LAN7430 in my design.

Thanks!

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