YAML definition for Field Mode interface

Change-Id: Ie9451b2b67a281e9d5eac47d3d06e4ea6f0e2323
Signed-off-by: Michael Tritz <mtritz@us.ibm.com>
diff --git a/xyz/openbmc_project/Control/FieldMode.interface.yaml b/xyz/openbmc_project/Control/FieldMode.interface.yaml
new file mode 100644
index 0000000..4cbe6c8
--- /dev/null
+++ b/xyz/openbmc_project/Control/FieldMode.interface.yaml
@@ -0,0 +1,11 @@
+description: >
+    An interface to enable field mode, which, when enabled, indicates that the
+    system is in production.
+
+properties:
+    - name: FieldModeEnabled
+      type: boolean
+      description: >
+          Keeps track of whether the BMC is in field mode. Enabling field mode
+          is intended to be a one-way operation.
+      default: false