tree 9d49c3b5114a4362ff8957793a6c2d8ed95a0d80
parent 7c42fd346806d17adb199853079e2cbc70b2b9ac
author Adriana Kobylak <anoo@us.ibm.com> 1678391599 -0600
committer Adriana Kobylak <anoo@linux.ibm.com> 1678803063 +0000

meta-ibm: systemd: Enable hardware watchdog

The hardware watchdog config was disabled with commit [1] because the
fan-watchdog.bb in meta-ibm uses the /dev/watchdog already, which
according to the kernel documentation[2] it's the same device as
/dev/watchdog0.
```
[1]: https://gerrit.openbmc.org/c/openbmc/openbmc/+/60829
[2]: https://www.kernel.org/doc/Documentation/watchdog/watchdog-kernel-api.txt
```

Update the hardware watchdog config to use the currently unused
watchdog1 device to be able to recover from systemd hangs.
Verified that all IBM and OpenPower device trees contain a wdt2 device.

Tested:
- With the change, the BMC reboots after 2 min from injecting a systemd
error:
Mar 09 20:53:30 witherspoon systemd[1]: Caught <ILL> from PID 552.
Mar 09 20:53:30 witherspoon systemd-coredump[562]: Due to PID 1 having
crashed coredump collection will now be turned off.
Mar 09 20:54:25 witherspoon kernel: watchdog: watchdog1: watchdog did
not stop!
Mar 09 20:54:22 witherspoon systemd[1]: Freezing execution.
Mar 09 20:55:57 witherspoon systemd-journald[132]: Failed to send
WATCHDOG=1 notification message: Connection refused
client_loop: send disconnect: Broken pipe

- Without the change, the BMC just hangs, it stops pinging, and never
reboots:
Mar 09 21:07:23 witherspoon systemd[1]: Caught <ILL> from PID 433.
Mar 09 21:07:24 witherspoon systemd-coredump[687]: Due to PID 1 having
crashed coredump collection will now be turned off.
Mar 09 21:08:07 witherspoon systemd[1]: Freezing execution.
Mar 09 21:08:41 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Connection refused
Mar 09 21:10:11 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected
Mar 09 21:11:41 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected
Mar 09 21:13:12 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected

Change-Id: I7850d23805c1cb5c0b84cac4add28df16fe648f5
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>