[BPI-R3] Hardware watchdog

Banana Pi Router design BPI-R3/R3 Mini(MT7986)
1

I wonder if there is a hardware watchdog available for BPi R3 (maybe using gpio pins) to monitor the system and restart it if neccessary.

2

There is one in the dtsi, but it is disabled in mainline kernel.

Depends on which operating system, if that has it enabled or not, using a devicetree overlay.

3

You can enable it in bpi-r3 dts and if it works (i’m not sure how to test correctly) we can upstream it. No need to struggle with overlays,just change it and recompile kernel fit

4

I guess to test, can use this tool:

linux/tools/testing/selftests/watchdog/watchdog-test.c at master · torvalds/linux (github.com)

For now, I’m using all available time on the OEM SFP, which is not a lot…

5

@ne20002 : Still do not know which operating system,but, if using archlinux, just add the following file

/boot/dtbos/enable-watchdog.dts
-------------------------------
/dts-v1/;
/plugin/;

&watchdog {
  status = "okay";
};

And execute script:

bpir-writefip

Then build the tool and play around with the watchdog.