Other Parts Discussed in Thread: AM3352
Tool/software:
Hi, all.
I caught the problem with the watchdog using on AM335X cpu.
We use the kirstone yocto build. Version of kernel is 6.1.33.
Log and kernel crash is below:
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 6.1.33-g40c32565ca (oe-user@oe-host) (arm-oe-linux-gnueabi-gcc (GCC) 11.3.0, GNU ld (GNU Binutils) 2.38.20220708) #1 SMP Thu Jul 6 14:17:24 UTC 2023
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: TI AM335x ALC ROUTER 6_10
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 64 MiB at 0x9b800000
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000080000000-0x000000009fdfffff]
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000080000000-0x000000009fdfffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x000000009fdfffff]
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] AM335X ES2.1 (neon)
[ 0.000000] percpu: Embedded 16 pages/cpu s33748 r8192 d23596 u65536
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 129540
[ 0.000000] Kernel command line: console=ttyO0,115200n8 loginShell=allow root=PARTUUID=a396582f-02 rw rootfstype=ext4 rootwait
[ 0.000000] Unknown kernel command line parameters "loginShell=allow", will be passed to user space.
[ 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: 432400K/522240K available (12288K kernel code, 1545K rwdata, 3156K rodata, 1024K init, 308K bss, 24304K reserved, 65536K cma-reserved, 0K highmem)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] trace event string verifier disabled
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU event tracing is enabled.
[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] IRQ: Found an INTC at 0x(ptrval) (revision 5.0) with 128 interrupts
[ 0.000000] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 0.000000] TI gptimer clocksource: always-on /ocp/interconnect@44c00000/segment@200000/target-module@31000
[ 0.000003] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[ 0.000035] clocksource: dmtimer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[ 0.000668] TI gptimer clockevent: 24000000 Hz at /ocp/interconnect@48000000/segment@0/target-module@40000
[ 0.003449] Console: colour dummy device 80x30
[ 0.003505] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[ 0.003516] This ensures that you still see kernel messages. Please
[ 0.003523] update your kernel commandline.
[ 0.003574] Calibrating delay loop... 597.60 BogoMIPS (lpj=2988032)
[ 0.120799] pid_max: default: 32768 minimum: 301
[ 0.121066] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.121093] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.122091] CPU: Testing write buffer coherency: ok
[ 0.122175] CPU0: Spectre v2: using BPIALL workaround
[ 0.122681] CPU0: thread -1, cpu 0, socket -1, mpidr 0
[ 0.123976] Setting up static identity map for 0x80100000 - 0x80100060
[ 0.124285] rcu: Hierarchical SRCU implementation.
[ 0.124297] rcu: Max phase no-delay instances is 1000.
[ 0.127122] EFI services will not be available.
[ 0.127514] smp: Bringing up secondary CPUs ...
[ 0.127528] smp: Brought up 1 node, 1 CPU
[ 0.127542] SMP: Total of 1 processors activated (597.60 BogoMIPS).
[ 0.127558] CPU: All CPU(s) started in SVC mode.
[ 0.128409] devtmpfs: initialized
[ 0.150245] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 0.150628] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.150669] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
[ 0.156990] pinctrl core: initialized pinctrl subsystem
[ 0.158471] DMI not present or invalid.
[ 0.159579] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.163453] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.165124] thermal_sys: Registered thermal governor 'step_wise'
[ 0.165295] cpuidle: using governor menu
[ 0.189384] No ATAGs?
[ 0.189410] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.192621] Serial: AMBA PL011 UART driver
[ 2.028517] SCSI subsystem initialized
[ 2.029450] usbcore: registered new interface driver usbfs
[ 2.029529] usbcore: registered new interface driver hub
[ 2.029602] usbcore: registered new device driver usb
[ 2.030181] pps_core: LinuxPPS API ver. 1 registered
[ 2.030195] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 2.030246] PTP clock support registered
[ 2.030454] EDAC MC: Ver: 3.0.0
[ 2.034388] clocksource: Switched to clocksource dmtimer
[ 2.129131] NET: Registered PF_INET protocol family
[ 2.129535] IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear)
[ 2.131257] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 2.131311] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 2.131335] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 2.131404] TCP bind hash table entries: 4096 (order: 4, 65536 bytes, linear)
[ 2.131566] TCP: Hash tables configured (established 4096 bind 4096)
[ 2.131700] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 2.131738] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 2.131945] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 2.133052] RPC: Registered named UNIX socket transport module.
[ 2.133072] RPC: Registered udp transport module.
[ 2.133080] RPC: Registered tcp transport module.
[ 2.133086] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 2.134701] PCI: CLS 0 bytes, default 64
[ 2.136370] Initialise system trusted keyrings
[ 2.137301] workingset: timestamp_bits=30 max_order=17 bucket_order=0
[ 2.145984] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 2.147253] NFS: Registering the id_resolver key type
[ 2.147380] Key type id_resolver registered
[ 2.147390] Key type id_legacy registered
[ 2.147541] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 2.147555] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 2.147611] ntfs: driver 2.1.32 [Flags: R/O].
[ 2.148456] Key type asymmetric registered
[ 2.148474] Asymmetric key parser 'x509' registered
[ 2.148731] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247)
[ 2.148748] io scheduler mq-deadline registered
[ 2.148761] io scheduler kyber registered
[ 2.242307] Serial: 8250/16550 driver, 5 ports, IRQ sharing enabled
[ 2.246058] STMicroelectronics ASC driver initialized
[ 2.264493] brd: module loaded
[ 2.273564] loop: module loaded
[ 2.276982] SPI driver spidev has no spi_device_id for utc,userspi
[ 2.281860] CAN device driver interface
[ 2.282381] e1000e: Intel(R) PRO/1000 Network Driver
[ 2.282391] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 2.282497] igb: Intel(R) Gigabit Ethernet Network Driver
[ 2.282507] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 2.283731] pegasus: Pegasus/Pegasus II USB Ethernet driver
[ 2.283803] usbcore: registered new interface driver pegasus
[ 2.283887] usbcore: registered new interface driver asix
[ 2.283948] usbcore: registered new interface driver ax88179_178a
[ 2.284001] usbcore: registered new interface driver cdc_ether
[ 2.284069] usbcore: registered new interface driver smsc75xx
[ 2.284143] usbcore: registered new interface driver smsc95xx
[ 2.284215] usbcore: registered new interface driver net1080
[ 2.284269] usbcore: registered new interface driver cdc_subset
[ 2.284321] usbcore: registered new interface driver zaurus
[ 2.284625] usbcore: registered new interface driver cdc_ncm
[ 2.285746] usbcore: registered new interface driver usb-storage
[ 2.286969] i2c_dev: i2c /dev entries driver
[ 2.290142] cpuidle: enable-method property 'ti,am3352' found operations
[ 2.291067] sdhci: Secure Digital Host Controller Interface driver
[ 2.291083] sdhci: Copyright(c) Pierre Ossman
[ 2.291334] Synopsys Designware Multimedia Card Interface Driver
[ 2.291614] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.292503] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.293125] usbcore: registered new interface driver usbhid
[ 2.293142] usbhid: USB HID core driver
[ 2.297624] NET: Registered PF_INET6 protocol family
[ 2.299740] Segment Routing with IPv6
[ 2.299836] In-situ OAM (IOAM) with IPv6
[ 2.300060] NET: Registered PF_PACKET protocol family
[ 2.300074] can: controller area network core
[ 2.300162] NET: Registered PF_CAN protocol family
[ 2.300176] can: raw protocol
[ 2.300190] can: broadcast manager protocol
[ 2.300207] can: netlink gateway - max_hops=1
[ 2.300592] Key type dns_resolver registered
[ 2.300787] ThumbEE CPU extension supported.
[ 2.300810] Registering SWP/SWPB emulation handler
[ 2.301428] omap_voltage_late_init: Voltage driver support not added
[ 2.302872] Loading compiled-in X.509 certificates
[ 2.338185] ti-sysc 44e07000.target-module: dts flag should be at module level for ti,no-reset-on-init
[ 2.351588] pinctrl-single 44e10800.pinmux: 142 pins, size 568
[ 2.358947] ti-sysc: probe of 44e31000.target-module failed with error -16
[ 2.365412] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 2.380158] ti-sysc: probe of 48040000.target-module failed with error -16
[ 2.396725] gpio gpiochip0: (gpio-0-31): not an immutable chip, please consider fixing it!
[ 2.399235] OMAP GPIO hardware version 0.1
[ 2.422960] gpio gpiochip1: (gpio-32-63): not an immutable chip, please consider fixing it!
[ 2.427063] gpio gpiochip2: (gpio-64-95): not an immutable chip, please consider fixing it!
[ 2.445753] omap_rng 48310000.rng: Random Number Generator ver. 20
[ 2.463678] debugfs: Directory '49000000.dma' with parent 'dmaengine' already present!
[ 2.463726] edma 49000000.dma: TI EDMA DMA engine driver
[ 2.477746] random: crng init done
[ 2.504109] omap_reset_deassert: timedout waiting for gfx:0
[ 2.504176] ti-sysc: probe of 5600fe00.target-module failed with error -110
[ 2.508279] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
[ 2.511477] gpio gpiochip3: (gpio-96-127): not an immutable chip, please consider fixing it!
[ 2.516728] l3-aon-clkctrl:0000:0: failed to disable
[ 2.519774] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a 8250
[ 3.536621] printk: console [ttyS0] enabled
[ 3.614635] tps65910-rtc tps65910-rtc: registered as rtc0
[ 3.622406] tps65910-rtc tps65910-rtc: setting system clock to 2000-01-01T00:00:00 UTC (946684800)
[ 3.633190] at24 0-0051: supply vcc not found, using dummy regulator
[ 3.640577] at24 0-0051: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
[ 3.648661] pca953x 0-0022: supply vcc not found, using dummy regulator
[ 3.655646] pca953x 0-0022: using AI
[ 3.661234] at24 0-0050: supply vcc not found, using dummy regulator
[ 3.668499] at24 0-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
[ 3.675754] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 3.682792] DMA allotted for tx0,rx0
[ 3.686596] DMA allotted for tx1,rx1
[ 3.693310] DMA allotted for tx0,rx0
[ 3.697123] DMA allotted for tx1,rx1
[ 3.711324] sdhci-omap 481d8000.mmc: Got WP GPIO
[ 3.716402] sdhci-omap 481d8000.mmc: supply pbias not found, using dummy regulator
[ 3.730332] sdhci-omap 481d8000.mmc: supply vqmmc not found, using dummy regulator
[ 3.738790] sdhci-omap 481d8000.mmc: using old ti,non-removable property
[ 3.772865] mmc1: SDHCI controller on 481d8000.mmc [481d8000.mmc] using External DMA
[ 3.784513] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6, bus freq 1000000
[ 3.799882] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[ 3.809310] davinci_mdio 4a101000.mdio: phy[1]: device 4a101000.mdio:01, driver Micrel KSZ9031 Gigabit PHY
[ 3.820335] cpsw 4a100000.ethernet: initialized cpsw ale version 1.4
[ 3.826901] cpsw 4a100000.ethernet: ALE Table size 1024
[ 3.833223] cpsw 4a100000.ethernet: cpts: overflow check period 500 (jiffies)
[ 3.841819] at24: ALC GEN5 DTB detected
[ 3.846295] at24: offset=64 00:e0:c9:27:f4:92
[ 3.850724] Detected MACID from EEPROM = 00:e0:c9:27:f4:92
[ 3.858787] at24: offset=70 00:e0:c9:27:f4:91
[ 3.863218] cpsw 4a100000.ethernet: cpsw: Detected MACID1 from EEPROM = 00:e0:c9:27:f4:91
[ 3.875855] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 3.889634] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 3.897976] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 3.906787] cfg80211: failed to load regulatory.db
[ 3.912239] Waiting for root device PARTUUID=a396582f-02...
[ 3.944197] mmc1: new high speed MMC card at address 0001
[ 3.951998] mmcblk1: mmc1:0001 IS016G 7.28 GiB
[ 3.961524] mmcblk1: p1 p2 p3 p4
[ 3.968086] mmcblk1boot0: mmc1:0001 IS016G 4.00 MiB
[ 3.975452] mmcblk1boot1: mmc1:0001 IS016G 4.00 MiB
[ 3.982408] mmcblk1rpmb: mmc1:0001 IS016G 4.00 MiB, chardev (243:0)
[ 4.065903] EXT4-fs (mmcblk1p2): recovery complete
[ 4.071910] EXT4-fs (mmcblk1p2): mounted filesystem with ordered data mode. Quota mode: disabled.
[ 4.081169] VFS: Mounted root (ext4 filesystem) on device 179:2.
[ 4.089343] devtmpfs: mounted
[ 4.094935] Freeing unused kernel image (initmem) memory: 1024K
[ 4.101916] Run /sbin/init as init process
INIT: version 3.01 booting
Starting udev
[ 4.759220] udevd[110]: starting version 3.2.10
[ 4.829838] udevd[111]: starting eudev-3.2.10
[ 11.944252] EXT4-fs (mmcblk1p3): recovery complete
[ 11.949359] EXT4-fs (mmcblk1p3): mounted filesystem with ordered data mode. Quota mode: disabled.
[ 11.988176] EXT4-fs (mmcblk1p4): recovery complete
[ 11.993077] EXT4-fs (mmcblk1p4): mounted filesystem with ordered data mode. Quota mode: disabled.
[ 12.054259] ext3: Unknown parameter 'umask'
[ 12.087949] ext2: Unknown parameter 'umask'
[ 12.092263] ext4: Unknown parameter 'umask'
[ 12.150243] squashfs: Unknown parameter 'umask'
[ 12.189438] FAT-fs (mmcblk1p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 13.443080] EXT4-fs (mmcblk1p2): re-mounted. Quota mode: disabled.
[ 13.652543] cryptodev: loading out-of-tree module taints kernel.
[ 13.662882] cryptodev: driver 1.12 loaded.
Fri Mar 9 12:34:56 UTC 2018
INIT: Entering runlevel: 5
Configuring network interfaces... [ 14.962202] cpsw 4a100000.ethernet: initializing cpsw version 1.12 (0)
[ 15.055531] SMSC LAN8710/LAN8720 4a101000.mdio:00: attached PHY driver (mii_bus:phy_addr=4a101000.mdio:00, irq=POLL)
udhcpc: started, v1.35.0
udhcpc: broadcasting discover
udhcpc: broadcasting discover
[ 18.485313] cpsw 4a100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
[ 18.493435] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
udhcpc: broadcasting discover
udhcpc: broadcasting select for 169.254.1.6, server 169.254.1.2
udhcpc: lease of 169.254.1.6 obtained from 169.254.1.2, lease time 60
ifconfig: SIOCGIFFLAGS: No such device
ifconfig: SIOCSIFADDR: No such device
done.
Starting system message bus: dbus.
starting DNS forwarder and DHCP server: dnsmasq... done.
Starting syslogd/klogd: done
/etc/rc5.d/S25watchdog -----------
Starting crond: OK
grep: /var/lib/opkg/info/*.control: No such file or directory
am335x login: root
root@am335x:~# /usr/sbin/watchdog -v
watchdog: String 'watchdog-device' found as '/dev/watchdog'
watchdog: Variable 'realtime' found as 'yes' = 1
watchdog: In[ 36.304206] l4-wkup-clkctrl:00d4:0: failed to enable
teger 'priority' found = 1
[ 36.309499] 8<--- cut here ---
[ 36.314786] Unhandled fault: external abort on non-linefetch (0x1028) at 0xf9e35034
[ 36.322489] [f9e35034] *pgd=44e11452(bad)
[ 36.326549] Internal error: : 1028 [#1] SMP ARM
[ 36.331111] Modules linked in: cryptodev(O)
[ 36.335336] CPU: 0 PID: 656 Comm: watchdog Tainted: G O 6.1.33-g40c32565ca #1
[ 36.343913] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 36.350038] PC is at omap_wdt_disable+0x14/0xa8
[ 36.354618] LR is at omap_wdt_start+0x34/0xf0
[ 36.359003] pc : [<c0955f2c>] lr : [<c0956174>] psr: 60060013
[ 36.365304] sp : e0105d38 ip : 00000000 fp : 00000000
[ 36.370557] r10: c0dd1028 r9 : c1e2dca0 r8 : 00000008
[ 36.375810] r7 : 73851294 r6 : c1e2dcbc r5 : f9e35000 r4 : c1e2dc40
[ 36.382373] r3 : f9e35034 r2 : 00000000 r1 : f9e35000 r0 : f9e35048
[ 36.388937] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 36.396115] Control: 10c5387d Table: 82e44019 DAC: 00000051
[ 36.401889] Register r0 information: 0-page vmalloc region starting at 0xf9c00000 allocated at iotable_init+0x0/0xec
[ 36.412505] Register r1 information: 0-page vmalloc region starting at 0xf9c00000 allocated at iotable_init+0x0/0xec
[ 36.423102] Register r2 information: NULL pointer
[ 36.427840] Register r3 information: 0-page vmalloc region starting at 0xf9c00000 allocated at iotable_init+0x0/0xec
[ 36.438436] Register r4 information: slab kmalloc-256 start c1e2dc00 pointer offset 64 size 256
[ 36.447219] Register r5 information: 0-page vmalloc region starting at 0xf9c00000 allocated at iotable_init+0x0/0xec
[ 36.457816] Register r6 information: slab kmalloc-256 start c1e2dc00 pointer offset 188 size 256
[ 36.466677] Register r7 information: non-paged memory
[ 36.471760] Register r8 information: non-paged memory
[ 36.476843] Register r9 information: slab kmalloc-256 start c1e2dc00 pointer offset 160 size 256
[ 36.485703] Register r10 information: non-slab/vmalloc memory
[ 36.491486] Register r11 information: NULL pointer
[ 36.496308] Register r12 information: NULL pointer
[ 36.501130] Process watchdog (pid: 656, stack limit = 0x28308e3a)
[ 36.507267] Stack: (0xe0105d38 to 0xe0106000)
[ 36.511652] 5d20: c1e2dc40 c2858050
[ 36.519878] 5d40: c2835400 c0954c38 00000010 c2b7c21c e0105d94 c0162d50 00000001 c2835400
[ 36.528104] 5d60: c2858050 c2803c00 c1e2dc40 c283568c c130dc60 c0954dcc c1337014 c2803c00
[ 36.536329] 5d80: 00000082 c130dc74 c2858050 c0676d8c c0d6b108 c2858050 c2803c00 c13b41e8
[ 36.544554] 5da0: c1a45fc0 00000000 c2803c00 c02af39c 00000082 7e62cb4e c25bd660 c2803c00
[ 36.552779] 5dc0: c2858050 00000000 c02af294 c2803c08 e0105f30 c02a5bec 00000001 c121f838
[ 36.561004] 5de0: 00000000 e0105e68 00000000 e0105f30 c2803c00 c02bb134 c2491180 e0105eb0
[ 36.569229] 5e00: c2be4300 c28c5500 00000000 00000000 00000063 c017be18 00000001 c28c5500
[ 36.577454] 5e20: 00000041 c0a04d74 c2eedd80 c0ee73b8 e0105e54 00000003 c2eee000 7e62cb4e
[ 36.585680] 5e40: 00000000 c18e8000 e0105f30 c2eedd80 00000001 c01002c4 c2eedd80 00000142
[ 36.593905] 5e60: 00000000 c02bbee4 c2803550 c25bd660 c0d4fd76 00000008 c18e8015 c2eedd80
[ 36.602129] 5e80: 00000000 c25f8ee0 c2858050 00000101 00000000 00000000 00000000 0000007a
[ 36.610355] 5ea0: 0000057e 00000000 00000000 00000000 e0105eb4 c0233dc4 c2c53a80 5ac3c35a
[ 36.618579] 5ec0: c2e1a380 b6df1ae6 e0105f2c c0c82884 00000000 00000000 00000000 7e62cb4e
[ 36.626804] 5ee0: 00000000 c18e8000 00000000 00000002 ffffff9c 00000000 000841ed c02cbf14
[ 36.635030] 5f00: c18e8000 7e62cb4e e0105f60 c18e8000 00000003 e0105f60 ffffff9c c02a75b0
[ 36.643255] 5f20: e0105fb0 c01002c4 00000121 5ac3c35a 00000001 00000000 00000002 00000100
[ 36.651480] 5f40: 00000001 7e62cb4e bed5a240 ffffff9c 0002c3a0 00000000 00000142 c02a7a4c
[ 36.659705] 5f60: 00080001 00000000 00000000 00000000 00000000 00000000 00080001 00000000
[ 36.667929] 5f80: 00000000 00000000 00000000 00000000 00000000 7e62cb4e 00000121 00080001
[ 36.676155] 5fa0: 0002c3a0 c0100060 00080001 0002c3a0 ffffff9c 0002c3a0 00080001 00000000
[ 36.684379] 5fc0: 00080001 0002c3a0 00000000 00000142 0002a230 0002abc4 0002aba0 00000000
[ 36.692604] 5fe0: 00000142 bed5aad8 b6e703c5 b6df1ae6 20060030 ffffff9c 00000000 00000000
[ 36.700836] omap_wdt_disable from omap_wdt_start+0x34/0xf0
[ 36.706453] omap_wdt_start from watchdog_start+0x8c/0x1a0
[ 36.712002] watchdog_start from watchdog_open+0x80/0xf0
[ 36.717369] watchdog_open from misc_open+0x130/0x15c
[ 36.722487] misc_open from chrdev_open+0x108/0x218
[ 36.727416] chrdev_open from do_dentry_open+0x140/0x474
[ 36.732774] do_dentry_open from path_openat+0xa6c/0xcc4
[ 36.738143] path_openat from do_filp_open+0x78/0x118
[ 36.743241] do_filp_open from do_sys_openat2+0xa0/0x16c
[ 36.748597] do_sys_openat2 from sys_openat+0x9c/0xc4
[ 36.753694] sys_openat from ret_fast_syscall+0x0/0x54
[ 36.758876] Exception stack(0xe0105fa8 to 0xe0105ff0)
[ 36.763961] 5fa0: 00080001 0002c3a0 ffffff9c 0002c3a0 00080001 00000000
[ 36.772186] 5fc0: 00080001 0002c3a0 00000000 00000142 0002a230 0002abc4 0002aba0 00000000
[ 36.780408] 5fe0: 00000142 bed5aad8 b6e703c5 b6df1ae6
[ 36.785495] Code: e30a3aaa e2810048 e5803000 e2813034 (e5912034)
[ 36.791627] ---[ end trace 0000000000000000 ]---
[ 36.796270] note: watchdog[656] exited with irqs disabled
root@am335x:~#
I also attached the .config file with general dtb files.
By gogling the problem I found that possible reason is the clock absent. But watchdog driver initialization was good, Error occurs only when watchdog daemon tries to open/start the /dev/watchdog (/dev/watchdog0) file.