Raspberry pi 4 integrated hardware watchdog?

Installing and Using OpenWrt
1

Hello everyone,

After some research, i just discovered that apparently all raspberry pi 4 have a build in watchdog according to this post and this tutorial.

In the official documentation it is not clearly described but there is some mention of this watchdog.

My question is, does the prebuild OpenWrt images make use / have the right packages to use this watchdog by default and can it replace a proper hardware watchdog?

If yes, how do we use it to reboot the pi in case it stops responding?

If no, i would be grateful if someone can point me to the right direction to make use of this?

2

Just as I found it you closed it.

1 Like
3

Yes, sorry. I made some typos and decided to start from scratch. My bad...

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4

Thank you for the link. After checking it, it does not mention Raspberry Pi whatsoever. Could kmod-w83627hf-wdt work with Raspberry Pi?

5

It tacitly mentions it:

Most embedded devices will have their hardware watchdog enabled in the default kernel configuration of their target, which means it will be built-in (no kmod to install, it's always available).

Since we know the Pi does have watchdog built in start with Controlling Watchdog.

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6

Okay that seems to match with the example boot log for the raspberry pi in toh.

[    0.298371] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
...
[    1.660574] init: - watchdog -
...
[    7.690136] procd: - watchdog -
[    8.226259] procd: - watchdog -


Will try this out and revert back. Thank you !
1 Like
7

If that is the solution:

8

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