In getting started guide, Linux Kernel is continuously resetting.

[embeddedbro]

I am following the "getting started" guide

https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP1_boards/STM32MP157x-DK2/Develop_on_Arm%C2%AE_Cortex%C2%AE-A7/Modify,_rebuild_and_reload_the_Linux%C2%AE_kernel

I am successfully able to compile and transfer the kernel on board but after giving reset command in step 5, board is constantly resetting. 

5.3. Reboot the board

Starting kernel ...

I/TC: Secondary CI/TC: Secondary CPU 1 switching to normal world boot
I/TC: Reserved shared memory is disabled
I/TC: Dynamic shared memory is enabled
I/TC: Normal World virtualization support is disabled
I/TC: Asynchronous notifications are disabled
NOTICE: CPU: STM32MP157FAC Rev.Z
NOTICE: Model: STMicroelectronics STM32MP157F-DK2 Discovery Board
NOTICE: Board: MB1272 Var4.0 Rev.C-03
INFO: PMIC version = 0x21
NOTICE: Reset reason (0x114):
INFO: IWDG1 Reset (rst_iwdg1)
INFO: FCONF: Reading TB_FW firmware configuration file from: 0x2ffe2000
INFO: FCONF: Reading firmware configuration information for: stm32mp_fuse
INFO: FCONF: Reading firmware configuration information for: stm32mp_io
INFO: Using SDMMC
INFO: Instance 1
INFO: Boot used partition fsbl1
NOTICE: BL2: v2.10-stm32mp1-r2.0(debug):lts-v2.10.13-dirty(b1f57509)
NOTICE: BL2: Built : 17:10:59, Feb 14 2025
INFO: BL2: Doing platform setup
INFO: RAM: DDR3-DDR3L 16bits 533000kHz
INFO: Memory size = 0x20000000 (512 MB)
INFO: BL2: Loading image id 1
INFO: Loading image id=1 at address 0x2ffff000
INFO: Image id=1 loaded: 0x2ffff000 - 0x2ffff1ea
INFO: FCONF: Reading FW_CONFIG firmware configuration file from: 0x2ffff000
INFO: FCONF: Reading firmware configuration information for: dyn_cfg
INFO: FCONF: Reading firmware configuration information for: stm32mp1_firewall
INFO: BL2: Loading image id 4
INFO: Loading image id=4 at address 0x2ffc0000
INFO: Image id=4 loaded: 0x2ffc0000 - 0x2ffc002c
INFO: OPTEE ep=0x2ffc0000
INFO: OPTEE header info:
INFO: magic=0x4554504f
INFO: version=0x2
INFO: arch=0x0
INFO: flags=0x0
INFO: nb_images=0x2
INFO: BL2: Loading image id 8
INFO: Loading image id=8 at address 0x2ffc0000
INFO: Image id=8 loaded: 0x2ffc0000 - 0x2ffd2b40
INFO: BL2: Loading image id 9
INFO: Loading image id=9 at address 0xde000000
INFO: Image id=9 loaded: 0xde000000 - 0xde070000
INFO: BL2: Loading image id 2
INFO: Loading image id=2 at address 0xc0500000
INFO: Image id=2 loaded: 0xc0500000 - 0xc0521760
INFO: BL2: Skip loading image id 16
INFO: BL2: Loading image id 5
INFO: Loading image id=5 at address 0xc0100000
INFO: Image id=5 loaded: 0xc0100000 - 0xc021e570
NOTICE: BL2: Booting BL32
INFO: Entry point address = 0x2ffc0000
INFO: SPSR = 0x1d3
I/TC: Early console on UART#4
I/TC:
I/TC: Pager is enabled. Hashes: 3680 bytes
I/TC: Pager pool size: 96kB
I/TC: Embedded DTB found
I/TC: OP-TEE version: 4.0.0-dev (gcc version 13.3.0 (GCC)) #1 Fri Oct 20 18:29:31 UTC 2023 arm
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: Override the OTP 18: 0x7bbd0000 to 0x7bbd01e0
I/TC: WARNING: Embeds insecure stm32mp_provisioning driver
I/TC: Platform stm32mp1: flavor PLATFORM_FLAVOR - DT stm32mp157f-dk2.dts
I/TC: OP-TEE ST profile: secure_and_system_services
I/TC: HUK unlocked
I/TC: Primary CPU switching to normal world boot
I/TC: Reserved shared memory is disabled
I/TC: Dynamic shared memory is enabled
I/TC: Normal World virtualization support is disabled
I/TC: Asynchronous notifications are disabled
optee optee: OP-TEE: revision 4.0 (2a5b1d12)


U-Boot 2023.10-stm32mp-r2 (Oct 02 2023 - 14:39:59 +0000)

CPU: STM32MP157FAC Rev.Z
Model: STMicroelectronics STM32MP157F-DK2 Discovery Board
Board: stm32mp1 in trusted mode (st,stm32mp157f-dk2)
Board: MB1272 Var4.0 Rev.C-03
DRAM: no /fwu-mdata node ?
512 MiB
optee optee: OP-TEE: revision 4.0 (2a5b1d12)
I/TC: Reserved shared memory is disabled
I/TC: Dynamic shared memory is enabled
I/TC: Normal World virtualization support is disabled
I/TC: Asynchronous notifications are disabled
Clocks:
- MPU : 650 MHz
- MCU : 208.878 MHz
- AXI : 266.500 MHz
- PER : 24 MHz
- DDR : 533 MHz
Core: 384 devices, 44 uclasses, devicetree: board
WDT: Started watchdog with servicing every 1000ms (32s timeout)
NAND: 0 MiB
MMC: STM32 SD/MMC: 0
Loading Environment from MMC... OK
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@5800a000
No EFI system partition
No EFI system partition
Failed to persist EFI variables
Hit any key to stop autoboot: 0
Boot over mmc0!
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:8...
Found /mmc0_extlinux/stm32mp157f-dk2_extlinux.conf
Retrieving file: /mmc0_extlinux/stm32mp157f-dk2_extlinux.conf
Retrieving file: /splash_portrait.bmp
Select the boot mode
1: OpenSTLinux
2: stm32mp157f-dk2-a7-examples
3: stm32mp157f-dk2-m4-examples
Enter choice: 1: OpenSTLinux
Retrieving file: /uImage
Retrieving file: /st-image-resize-initrd
append: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw console=ttySTM0,115200
Retrieving file: /stm32mp157f-dk2.dtb
## Booting kernel from Legacy Image at c2000000 ...
Image Name: Linux-6.6.78
Created: 2025-11-07 23:58:46 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 8693576 Bytes = 8.3 MiB
Load Address: c2000040
Entry Point: c2000040
Verifying Checksum ... OK
## Flattened Device Tree blob at c6000000
Booting using the fdt blob at 0xc6000000
Working FDT set to c6000000
XIP Kernel Image
Loading Ramdisk to cf9ce000, end cffff418 ... OK
Loading Device Tree to cf9aa000, end cf9cdf9c ... OK
Working FDT set to cf9aa000

Starting kernel ...

I/TC: Secondary CI/TC: Secondary CPU 1 switching to normal world boot
I/TC: Reserved shared memory is disabled
I/TC: Dynamic shared memory is enabled
I/TC: Normal World virtualization support is disabled
I/TC: Asynchronous notifications are disabled