@RobertCNelson I went through the process of enabling earlyprintk (https://wiki.st.com/stm32mpu/wiki/Dmesg_and_Linux_kernel_log#earlyprintk), and here’s the whole boot process. It makes it to the last line, hangs for about a minute, and then restarts. I’m not quite sure what it’s waiting for at the end:
U-Boot SPL 2020.10-stm32mp-r1 (Oct 05 2020 - 15:15:32 +0000)
Model: STMicroelectronics STM32MP157D-DK1 Discovery Board
RAM: DDR3-DDR3L 16bits 533000kHz
WDT: Started with servicing (32s timeout)
Trying to boot from MMC1
U-Boot 2020.10-stm32mp-r1 (Oct 05 2020 - 15:15:32 +0000)
CPU: STM32MP157DAC Rev.Z
Model: STMicroelectronics STM32MP157D-DK1 Discovery Board
Board: stm32mp1 in basic mode (st,stm32mp157d-dk1)
Board: MB1272 Var3.0 Rev.C-02
DRAM: 512 MiB
Clocks:
- MPU : 800 MHz
- MCU : 208.878 MHz
- AXI : 266.500 MHz
- PER : 24 MHz
- DDR : 533 MHz
WDT: Started with servicing (32s timeout)
NAND: 0 MiB
MMC: STM32 SD/MMC: 0
Loading Environment from MMC... OK
In: serial
Out: serial
Err: serial
****************************************************
* WARNING 500mA power supply detected *
* Current too low, use a 3A power supply! *
****************************************************
Net: eth0: ethernet@5800a000
Hit any key to stop autoboot: 0
Boot over mmc0!
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:4...
Found /mmc0_extlinux/extlinux.conf
Retrieving file: /mmc0_extlinux/extlinux.conf
251 bytes read in 32 ms (6.8 KiB/s)
Retrieving file: /splash.bmp
7802 bytes read in 31 ms (245.1 KiB/s)
1: OpenSTLinux
Retrieving file: /uImage
7178824 bytes read in 341 ms (20.1 MiB/s)
append: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw earlyprintk console=ttySTM0,115200
Retrieving file: /stm32mp157d-dk1.dtb
114161 bytes read in 37 ms (2.9 MiB/s)
## Booting kernel from Legacy Image at c2000000 ...
Image Name: Linux-5.10.10
Created: 2021-01-23 15:04:06 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 7178760 Bytes = 6.8 MiB
Load Address: c2000040
Entry Point: c2000040
Verifying Checksum ... OK
## Flattened Device Tree blob at c4000000
Booting using the fdt blob at 0xc4000000
XIP Kernel Image
Loading Device Tree to cffe1000, end cffffdf0 ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.10.10 (oe-user@oe-host) (arm-poky-linux-gnueabi-gcc (GCC) 9.3.0, GNU ld (GNU Binutils) 2.34.0.20200220) #1 SMP PREEMPT Sat Jan 23 15:04:06 UTC 2021
[ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[ 0.000000] CPU: div instructions available: patching division code
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: STMicroelectronics STM32MP157D-DK1 Discovery Board
[ 0.000000] printk: bootconsole [earlycon0] enabled
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] Reserved memory: created DMA memory pool at 0x10000000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node mcuram2@10000000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x10040000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node vdev0vring0@10040000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x10041000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node vdev0vring1@10041000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x10042000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node vdev0buffer@10042000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x30000000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node mcuram@30000000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x38000000, size 0 MiB
[ 0.000000] OF: reserved mem: initialized node retram@38000000, compatible id shared-dma-pool
[ 0.000000] cma: Reserved 128 MiB at 0xd8000000
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x00000000c0000000-0x00000000dfffffff]
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00000000c0000000-0x00000000d3ffffff]
[ 0.000000] node 0: [mem 0x00000000d8000000-0x00000000dfffffff]
[ 0.000000] Initmem setup node 0 [mem 0x00000000c0000000-0x00000000dfffffff]
[ 0.000000] psci: probing for conduit method from DT.
[ 0.000000] psci: PSCIv1.0 detected in firmware.
[ 0.000000] psci: Using standard PSCI v0.2 function IDs
[ 0.000000] psci: Trusted OS migration not required
[ 0.000000] psci: SMC Calling Convention v1.0
[ 0.000000] percpu: Embedded 19 pages/cpu s48908 r8192 d20724 u77824
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 113536
[ 0.000000] Kernel command line: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw earlyprintk console=ttySTM0,115200
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 304604K/458752K available (11264K kernel code, 1159K rwdata, 3192K rodata, 1024K init, 243K bss, 23076K reserved, 131072K cma-reserved, 0K highmem)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 0.000000] rcu: Preemptible hierarchical RCU implementation.
[ 0.000000] rcu: RCU event tracing is enabled.
[ 0.000000] Trampoline variant of Tasks RCU enabled.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from start_kernel+0x390/0x54c with crng_init=0
[ 0.000000] arch_timer: cp15 timer(s) running at 24.00MHz (virt).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[ 0.000008] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[ 0.008091] Switching to timer-based delay loop, resolution 41ns
[ 0.015622] Console: colour dummy device 80x30
[ 0.020147] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[ 0.030630] pid_max: default: 32768 minimum: 301
[ 0.035486] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.042894] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.051654] CPU: Testing write buffer coherency: ok
[ 0.056990] /cpus/cpu@0 missing clock-frequency property
[ 0.062377] /cpus/cpu@1 missing clock-frequency property
[ 0.067781] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.074359] Setting up static identity map for 0xc0100000 - 0xc0100060
[ 0.081168] rcu: Hierarchical SRCU implementation.
[ 0.087181] smp: Bringing up secondary CPUs ...
[ 0.092621] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.092834] smp: Brought up 1 node, 2 CPUs
[ 0.102764] SMP: Total of 2 processors activated (96.00 BogoMIPS).
[ 0.109002] CPU: All CPU(s) started in SVC mode.
[ 0.114359] devtmpfs: initialized
[ 0.147642] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
[ 0.155738] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.165708] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.177780] pinctrl core: initialized pinctrl subsystem
[ 0.184634] NET: Registered protocol family 16
[ 0.192094] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.200757] thermal_sys: Registered thermal governor 'step_wise'
[ 0.201126] cpuidle: using governor menu
[ 0.211536] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[ 0.219619] hw-breakpoint: maximum watchpoint size is 8 bytes.
[ 0.225863] Serial: AMBA PL011 UART driver
[ 0.269565] stm32-pm-domain pm_domain: domain core-ret-power-domain registered
[ 0.276958] stm32-pm-domain pm_domain: subdomain core-power-domain registered
[ 0.284167] stm32-pm-domain pm_domain: domains probed
[ 0.311556] SCSI subsystem initialized
[ 0.316055] usbcore: registered new interface driver usbfs
[ 0.321794] usbcore: registered new interface driver hub
[ 0.327215] usbcore: registered new device driver usb
[ 0.332674] pps_core: LinuxPPS API ver. 1 registered
[ 0.337690] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.346997] PTP clock support registered
[ 0.351774] arm-scmi firmware:scmi0: SCMI Notifications - Core Enabled.
[ 0.358543] arm-scmi firmware:scmi0: unable to communicate with SCMI(-95)
[ 0.365441] arm-scmi: probe of firmware:scmi0 failed with error -95
[ 0.374350] clocksource: Switched to clocksource arch_sys_counter
[ 1.547460] NET: Registered protocol family 2
[ 1.552881] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[ 1.561519] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 1.569421] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 1.576775] TCP: Hash tables configured (established 4096 bind 4096)
[ 1.583346] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 1.590038] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 1.597339] NET: Registered protocol family 1
[ 1.602529] RPC: Registered named UNIX socket transport module.
[ 1.608586] RPC: Registered udp transport module.
[ 1.613336] RPC: Registered tcp transport module.
[ 1.618145] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.625632] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 5 counters available
[ 1.635614] Initialise system trusted keyrings
[ 1.640433] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[ 1.655943] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 1.663053] NFS: Registering the id_resolver key type
[ 1.668298] Key type id_resolver registered
[ 1.672523] Key type id_legacy registered
[ 1.676769] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 1.683575] ntfs: driver 2.1.32 [Flags: R/O].
[ 1.688289] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[ 1.695679] Key type asymmetric registered
[ 1.699824] Asymmetric key parser 'x509' registered
[ 1.704872] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[ 1.712341] io scheduler mq-deadline registered
[ 1.716966] io scheduler kyber registered
[ 1.729936] STM32 USART driver initialized
[ 1.752446] brd: module loaded
[ 1.767209] loop: module loaded
[ 1.775500] libphy: Fixed MDIO Bus: probed
[ 1.781387] CAN device driver interface
[ 1.787095] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver
[ 1.794698] usbcore: registered new interface driver pegasus
[ 1.800473] usbcore: registered new interface driver asix
[ 1.805996] usbcore: registered new interface driver ax88179_178a
[ 1.812203] usbcore: registered new interface driver cdc_ether
[ 1.818187] usbcore: registered new interface driver smsc75xx
[ 1.824044] usbcore: registered new interface driver smsc95xx
[ 1.829913] usbcore: registered new interface driver net1080
[ 1.835710] usbcore: registered new interface driver cdc_subset
[ 1.841726] usbcore: registered new interface driver zaurus
[ 1.847448] usbcore: registered new interface driver cdc_ncm
[ 1.854570] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.861205] ehci-platform: EHCI generic platform driver
[ 1.866919] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.873184] ohci-platform: OHCI generic platform driver
[ 1.879121] usbcore: registered new interface driver usb-storage
[ 1.888464] i2c /dev entries driver
[ 1.895995] stm32-cpufreq stm32-cpufreq: Failed to get chip info: -517
[ 1.903574] sdhci: Secure Digital Host Controller Interface driver
[ 1.909880] sdhci: Copyright(c) Pierre Ossman
[ 1.914277] Synopsys Designware Multimedia Card Interface Driver
[ 1.920787] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.927701] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.934241] usbcore: registered new interface driver usbhid
[ 1.939935] usbhid: USB HID core driver
[ 1.945150] remoteproc remoteproc0: releasing m4
[ 1.952421] NET: Registered protocol family 10
[ 1.958317] Segment Routing with IPv6
[ 1.962113] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 1.968995] NET: Registered protocol family 17
[ 1.973504] can: controller area network core
[ 1.978074] NET: Registered protocol family 29
[ 1.982566] can: raw protocol
[ 1.985580] can: broadcast manager protocol
[ 1.989811] can: netlink gateway - max_hops=1
[ 1.994705] Key type dns_resolver registered
[ 1.999183] ThumbEE CPU extension supported.
[ 2.003503] Registering SWP/SWPB emulation handler
[ 2.008745] Loading compiled-in X.509 certificates
[ 2.032688] remoteproc remoteproc0: releasing m4
[ 2.045747] stm32-usart 40010000.serial: deferred probe timeout, ignoring dependency
[ 2.054850] stm32-display 5a001000.display-controller: deferred probe timeout, ignoring dependency
[ 2.064686] stm32-dwmac 5800a000.ethernet: deferred probe timeout, ignoring dependency
[ 2.075385] stm32f7-i2c 40012000.i2c: deferred probe timeout, ignoring dependency
[ 2.083462] stm32f7-i2c 5c002000.i2c: deferred probe timeout, ignoring dependency
[ 2.092783] mmci-pl18x 58005000.sdmmc: deferred probe timeout, ignoring dependency
[ 2.102380] remoteproc remoteproc0: releasing m4
[ 2.108780] Warning: unable to open an initial console.
[ 2.114270] Waiting for root device PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582...