tree ca44674e97b5ccb866daa3a35181f8e7baddcdc0
parent 5523a1aba0c45959666b2ac0fac8cececf8e2a67
author Andrew Geissler <geissonator@yahoo.com> 1632346773 -0500
committer Andrew Geissler <geissonator@yahoo.com> 1633631470 +0000

witherspoon-tacoma: disable host watchdog function

Hostboot utilizes inband IPMI on witherspoon-tacoma. They relied on OPAL
firmware to continue pinging the watchdog and eventually disabling it.
For the most part though, IBM utilizes PHYP on witherspoon-tacoma
machines and they do not have the needed in-band IPMI support to do
this.

IBM needs either both firmware stacks (hostboot and PHYP) to use PLDM
(i.e. p10bmc) or IPMI (witherspoon). Tacoma is an outlier so just
disable the host watchdog function on Tacoma.

Tested:
- Verified a witherspoon-tacoma with PHYP booted successfully

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ibceb2ad6933973b97e122b83c89f6be7e7b8f868