Custom pinmux for L4T 35.2.1 breaks the ethernet

[huub.hendrikx]

Hi,

I’m currently porting L4T 35.2.1 to our custom carrier board with a Xavier NX. When I try to flash with our custom pinmux the ethernet connection breaks. When flashing the default devkit pinmux ethernet works fine.

Some points that might be helpful:

• The ethernet port LED is still blinking, and the other side of the Ethernet link detects the carrier.
• the dmesg output for nvethernet looks the same in both cases (custom/devkit pinmux). Except that the carrier-up line does not appear ( nvethernet 2490000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx)
• In ip l it says eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
• Warnings while generating the bootloader files from the device tree files
  ERROR: pin eqos_rd3_pf1(0x00022470) field nvidia,lpbk(0x00000020) is not matching, val = 0x01 expected = 0x00
  ERROR: pin eqos_sma_mdio_pf4(0x00022440) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin sdmmc4_cmd(0x00002440) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin soc_gpio10_pg6(0x00000410) field nvidia,tristate(0x00000010) is not matching, val = 0x01 expected = 0x00
  ERROR: pin gp_pwm2_px2(0x00000410) field nvidia,tristate(0x00000010) is not matching, val = 0x01 expected = 0x00
  ERROR: pin uart2_tx_px4(0x00000400) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin uart2_rx_px5(0x00000450) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin can0_dout_paa2(0x0000c400) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin can0_din_paa3(0x0000c450) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin uart3_tx_pcc5(0x00000400) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin uart3_rx_pcc6(0x00000450) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin soc_gpio22_pq2(0x00000459) field nvidia,pull(0x0000000c) is not matching, val = 0x02 expected = 0x00
  ERROR: pin uart1_tx_pr2(0x00000400) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x02
  ERROR: pin uart1_rx_pr3(0x00000454) field nvidia,pull(0x0000000c) is not matching, val = 0x01 expected = 0x02

What is the best way to debug this? Are there changes that need to be done to the default pinmux (v1.6)?

Thanks,

Huub

[WayneWWW]

Ethernet is using pins with “eqos” on its name. Make sure you didn’t change them.

[huub.hendrikx]

I’m using the same pinmux that I used in L4T 32.6.1 and there the ethernet worked, so I assume it’s not that, but will double check to make sure and report back here.

[WayneWWW]

When running that python script to convert pinmux cfg, please do not add parameter “–mandatory” it will prevent that error showing.

[huub.hendrikx]

Hi WayneWWW,

I generated the .dtsi files from a fresh pinmux sheet and the Ethernet worked fine. After investigating it looked like one of my dtsi files got corrupted. Everything is working fine now, thanks for your support.