Control.Power.Throttle: Add throttle Interface

Define a throttle status interface. This allows users to determine if a
component is being throttled and if so, what the causes are for the
throttle.
This is part of the Redfish 2022.3 Schema.

Change-Id: I30e820993e3c225cd82bbd6c78e0a01f9a432282
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
diff --git a/yaml/xyz/openbmc_project/Control/Power/Throttle.interface.yaml b/yaml/xyz/openbmc_project/Control/Power/Throttle.interface.yaml
new file mode 100644
index 0000000..04c4a13
--- /dev/null
+++ b/yaml/xyz/openbmc_project/Control/Power/Throttle.interface.yaml
@@ -0,0 +1,42 @@
+description: >
+    This interface provides information related to the throttle status of a
+    component.
+
+properties:
+    - name: ThrottleCauses
+      type: array[enum[self.ThrottleReasons]]
+      flags:
+          - readonly
+      description: >
+          This property shall contain the cause(s) of the component being
+          throttled when the Throttled property is true or an empty array if not
+          being throttled.
+    - name: Throttled
+      type: boolean
+      flags:
+          - readonly
+      default: false
+      description: >
+          This property shall indicate whether the component is throttled.
+
+enumerations:
+    - name: ThrottleReasons
+      description: >
+          The possible reasons a component could be throttled
+      values:
+          - name: ClockLimit
+            description: >
+                The cause of the component being throttled is a clock limit.
+          - name: ManagementDetectedFault
+            description: >
+                The cause of the component being throttled is a fault detected
+                by management hardware or firmware
+          - name: PowerLimit
+            decription: >
+                The cause of the component being throttled is a power limit.
+          - name: ThermalLimit
+            description: >
+                The cause of the component being throttled is a thermal limit.
+          - name: Unknown
+            description: >
+                The cause of the component being throttled is not known.