commit cc0232af9487f1096413daa22efd27c5641e44fc
author Harvey Wu <Harvey.Wu@quantatw.com> Thu Feb 09 14:58:55 2023 +0800
committer Harvey Wu <Harvey.Wu@quantatw.com> Wed Sep 20 14:53:32 2023 +0800
tree d276ec74be9d87ec0f442924cf4cb81752b0717a
parent f7c07c9553c5088b9a346e838183836212df2b6c

zone: Add debug interface to zone dbus path

- Add xyz.openbmc_project.Debug.Pid.Zone interface to fanctrl/zoneX dbus
  to record the PID config name which is driving this zone.

TEST:
```
busctl introspect xyz.openbmc_project.State.FanCtrl /xyz/openbmc_project/settings/fanctrl/zone0 xyz.openbmc_project.Debug.Pid.Zone
NAME                               TYPE      SIGNATURE RESULT/VALUE FLAGS
.Leader                            property  s         "CPU0_PID"   emits-change
```

Signed-off-by: Harvey Wu <Harvey.Wu@quantatw.com>
Change-Id: I6fcfa596eec6b51a7727c2a01e7d36e3698eebcf

pid/zone.cpp

diff --git a/pid/zone.cpp b/pid/zone.cpp
index a8c388a..995b2aa 100644
--- a/pid/zone.cpp
+++ b/pid/zone.cpp
@@ -516,4 +516,9 @@
     _pidsFailSafePercent[name] = percent;
 }
 
+std::string DbusPidZone::leader() const
+{
+    return _maximumSetPointName;
+}
+
 } // namespace pid_control