diff --git a/org/open_power/Host/Access.errors.yaml b/org/open_power/Host/Access.errors.yaml
new file mode 100644
index 0000000..08d6f4b
--- /dev/null
+++ b/org/open_power/Host/Access.errors.yaml
@@ -0,0 +1,5 @@
+- name: WriteCFAM
+  description: Failed to do a CFAM register write
+
+- name: ReadCFAM
+  description: Failed to do a CFAM register read
diff --git a/org/open_power/Host/Access.metadata.yaml b/org/open_power/Host/Access.metadata.yaml
new file mode 100644
index 0000000..45a9450
--- /dev/null
+++ b/org/open_power/Host/Access.metadata.yaml
@@ -0,0 +1,13 @@
+- name: WriteCFAM
+  meta:
+    - str:"ADDRESS=0x%X"
+      type: uint32
+  inherits:
+    - xyz.openbmc_project.Common.Callout.Device
+
+- name: ReadCFAM
+  meta:
+    - str:"ADDRESS=0x%X"
+      type: uint32
+  inherits:
+    - xyz.openbmc_project.Common.Callout.Device