tree 4d15005462bc54b256dded3d5892a6dee41deb37
parent 169975cf30bc41c5b83edd34bf95e913ac0a6fa1
author Adriana Kobylak <anoo@us.ibm.com> 1614202323 -0600
committer Adriana Kobylak <anoo@us.ibm.com> 1615317534 +0000

psu-ng: Get max PSU number from entity manager

Read the max number of PSUs supported from entity manager instead of
JSON since entity manager would have the value based on system. If the
entity manager interface does not exist by the time the psu manager
starts, subscribe to interfaces added. The psu manager can take action
once the max count property is available on D-Bus.

Tested: On Rainier 2U with debug traces:
1. Restarted phosphor-psu-monitor and verified maxPowerSupplies was 2.
2. Stopped xyz.openbmc_project.Inventory.Manager. Restarted
   phosphor-psu-monitor and verified maxPowerSupplies was 0.
3. Started xyz.openbmc_project.Inventory.Manager and verified the
   psu callback was triggered setting maxPowerSupplies to 2.
4. Stopped and started xyz.openbmc_project.Inventory.Manager and
   verified the psu callback was not called again.

Change-Id: Ieff796ca5c79bfddc1fc6e15e339a0b15eb422d7
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>