SMC: add events for Satellite Management Controllers

Add events to report issues with attached SMCs, such as
heartbeat failures or inability to communicate.  This is
reported as a generic event (SMCFailed), which is most
likely useful enough for external reporting and fault isolation,
but includes a field for additional debug data of the failure
type.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic0cc09135d1b8301f98e1df5b6b6e9180929c811
diff --git a/yaml/xyz/openbmc_project/State/SMC.events.yaml b/yaml/xyz/openbmc_project/State/SMC.events.yaml
new file mode 100644
index 0000000..64155aa
--- /dev/null
+++ b/yaml/xyz/openbmc_project/State/SMC.events.yaml
@@ -0,0 +1,35 @@
+version: 1.0.0
+
+errors:
+    - name: SMCFailed
+      severity: error
+      metadata:
+          - name: Identifier
+            type: object_path
+            primary: true
+            description: The name or identifier of the SMC.
+          - name: FailureType
+            type: string
+            description: An [optional] identifier of the failure type.
+      en:
+          description:
+              A Satellite Management Controller (SMC) has been detected in
+              failure state.
+          message:
+              The Satellite Management Controller '{Identifier}' is in a failure
+              state.
+      errno: EHOSTUNREACH
+
+events:
+    - name: SMCRestored
+      metadata:
+          - name: Identifier
+            type: object_path
+            primary: true
+            description: The name or identifier of the SMC.
+      en:
+          description:
+              The Satellite Management Controller (SMC) status is restored.
+          message:
+              The Satellite Management Controller '{Identifier}' is in a
+              restored state.