Failed to open watchdog after we enable PMIC-WDT and disable Tegra-WDT on TX2-4G

[Bryan_Zhong]

Hello,After we changed the ODMDATA to enable PMIC-wdt according the instruction as shown in the picture,we could not open the /dev/watchdog or /dev/watchdog0.

I would like to know why it is failed to open “/dev/watchdog” after enabling PMIC–WDT.

I replaced 0x1090000 with 0x10a0000 in three places in the file “p2771-0000.conf.common”.
The three places are as follows:
1.

2.

3.
.

We want to reboot the whole system .

Use of TX2 Watchdog peripheral - role of WDT_TIME_OUT input

The WDT0 device node is /dev/watchdog0. The following user-space sample code shows opening, enabling, obtaining and specifiying the timeout value, and kicking the watchdog timer. int fd, ret; int timeout = 0; /* open WDT0 device (WDT0 enables itself automatically) */ fd = open("/dev/watchdog0", O_RDWR); if(fd < 0) { fprintf(stderr, "Open watchdog device failed!\n"); return -1; } /* WDT0 is counting now,check the default timeout value */ ret = ioctl(fd, WDIOC_GETTIMEOUT, &timeout); if…

The reason why I want to reboot the whole system is that I want to find a way to solve this problem. I want to do some tests.You can find the details in this topic:

Use of TX2 Watchdog peripheral - role of WDT_TIME_OUT input

The WDT0 device node is /dev/watchdog0. The following user-space sample code shows opening, enabling, obtaining and specifiying the timeout value, and kicking the watchdog timer. int fd, ret; int timeout = 0; /* open WDT0 device (WDT0 enables itself automatically) */ fd = open("/dev/watchdog0", O_RDWR); if(fd < 0) { fprintf(stderr, "Open watchdog device failed!\n"); return -1; } /* WDT0 is counting now,check the default timeout value */ ret = ioctl(fd, WDIOC_GETTIMEOUT, &timeout); if…

I open the watchdog according this topic:

Use of TX2 Watchdog peripheral - role of WDT_TIME_OUT input

The WDT0 device node is /dev/watchdog0. The following user-space sample code shows opening, enabling, obtaining and specifiying the timeout value, and kicking the watchdog timer. int fd, ret; int timeout = 0; /* open WDT0 device (WDT0 enables itself automatically) */ fd = open("/dev/watchdog0", O_RDWR); if(fd < 0) { fprintf(stderr, "Open watchdog device failed!\n"); return -1; } /* WDT0 is counting now,check the default timeout value */ ret = ioctl(fd, WDIOC_GETTIMEOUT, &timeout); if…

[ShaneCCC]

Not clear your purpose for this topic. Could you make it clear.

Thanks

[Bryan_Zhong]

Thanks,it has been solved. Cause another program has opened the watchdog.