tree 13b89e2e92f2953c00a64e920142849e13231d4a
parent b837887c2a18ac326764f0c4950bf14ab8b0ce84
author Adriana Kobylak <anoo@us.ibm.com> 1633463867 +0000
committer Shawn McCarney <shawnmm@us.ibm.com> 1633621556 +0000

psu-ng: Move psu validation to event timer

During a BMC reset at power on, the validation would be performed while
the entity manager interfaces are still being added to D-Bus, therefore
causing an error log created because the information to determine which
power supplies may be present is missing from the configuration
information that entity manager publishes on D-Bus.

Move the validation to be called on a timer, so that every time an EM
interface is added, the timer resets, and the validation is called once
no more interfaces are detected.

Also call the validation through the timer during a power on in case EM
has not started yet (this is less common but still possible). The side
effect is that the validation occurs 2s after it's called during a power
on, but it doesn't delay the power on as it's scheduled through the
timer event.

Tested with debug traces:
- Reboot at power on performs validation after the EM interfaces are
  added and does not log an error.
Oct 05 14:33:52 p10bmc phosphor-psu-monitor[3472]: EM interface added
Oct 05 14:33:52 p10bmc phosphor-psu-monitor[3472]: EM interface added
Oct 05 14:33:53 p10bmc phosphor-psu-monitor[3472]: EM interface added: Start timer
Oct 05 14:33:53 p10bmc phosphor-psu-monitor[3472]: EM interface added
Oct 05 14:33:54 p10bmc phosphor-psu-monitor[3472]: EM interface added
Oct 05 14:33:54 p10bmc phosphor-psu-monitor[3472]: EM interface added: Start timer
Oct 05 14:33:54 p10bmc phosphor-psu-monitor[3472]: EM interface added
Oct 05 14:33:54 p10bmc phosphor-psu-monitor[3472]: EM interface added: Start timer
Oct 05 14:33:56 p10bmc phosphor-psu-monitor[3472]: validateConfig()
Oct 05 14:33:56 p10bmc phosphor-psu-monitor[3472]: validateConfig() validated

- Validation runs when power on is requested.
Oct 05 14:43:31 p10bmc phosphor-host-state-manager[714]: Change to Host State: xyz.openbmc_project.State.Host.HostState.TransitioningToRunning
Oct 05 14:43:31 p10bmc phosphor-psu-monitor[622]: powerOn: Start timer
Oct 05 14:43:33 p10bmc phosphor-psu-monitor[622]: validateConfig
Oct 05 14:43:33 p10bmc phosphor-psu-monitor[622]: validateConfig validated

- Validation runs when the phosphor-psu-monitor service is restarted at
  power on:
Oct 07 15:15:02 p10bmc phosphor-psu-monitor[19762]: initialize(): Start timer
Oct 07 15:15:04 p10bmc phosphor-psu-monitor[19762]: validateConfig
Oct 07 15:15:04 p10bmc phosphor-psu-monitor[19762]: validateConfig validated

Change-Id: I9f788622754604e5feb10cfec1ddc341c04c52a0
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>