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PROCESSOR-SDK-J784S4: Linux system kernel restart issues

quansheng zhu
Prodigy 205 points
Part Number: PROCESSOR-SDK-J784S4


During the process of porting and adapting to j784s4, a reboot issue was encountered.

Due to different peripheral circuit designs in the hardware, I have disabled all device nodes in the device tree, leaving only necessary and basic devices such as serial ports, EMMCs, DDRs, and USB devices.

In addition, we use the kernel configuration file, as shown in the attachment defconfig.txt. We have intercepted the log logs of several restarts, as shown in the attached messages.txt.

During the testing process, oscilloscope measurements revealed GPIO8, GPIO11, and SW of the PMIC_ The voltage of B4A pin will instantly drop to 0V during restart, and then recover

Please assist in analyzing the cause and resolving the restart issue.

Thank you！！！8865.messages.txt3302.defconfig.txt

  • 0
    TI__Guru**** 166380 points

    Hi,

    Does this restart happen consistently across all boots or it happens in some boots?
    It seems like CONFIG_K3_RTI_WATCHDOG=y so SOC watchdog might not be causing the reset.

    Also what tests are running when the reset happens?

    - Keerthy