Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 58 insertions, 0 deletions

diff --git a/roms/skiboot/doc/device-tree/ibm,opal/power-mgt/powercap.rst b/roms/skiboot/doc/device-tree/ibm,opal/power-mgt/powercap.rst
new file mode 100644
index 000000000..e59f6c283
--- /dev/null
+++ b/roms/skiboot/doc/device-tree/ibm,opal/power-mgt/powercap.rst
@@ -0,0 +1,58 @@
+.. _device-tree/ibm,opal/power-mgt/powercap:
+
+power-mgt/powercap
+------------------
+
+The powercap sensors are populated in this node. Each child node in
+the "powercap" node represents a power-cappable component.
+
+For example : ::
+
+        system-powercap/
+
+The :ref:`OPAL_GET_POWERCAP` and :ref:`OPAL_SET_POWERCAP` calls take a handle for
+what powercap property to get/set which is defined in the child node.
+
+The compatible property for the linux driver which will be
+"ibm,opal-powercap"
+
+Each child node has below properties:
+
+`powercap-current`
+  Handle to indicate the current powercap
+
+`powercap-min`
+  Absolute minimum possible powercap. This points to the soft powercap minimum
+  limit as exported by OCC. The powercap set in the soft powercap range may or
+  may not be maintained.
+
+`powercap-max`
+  Maximum possible powercap
+
+`powercap-hard-min`
+  This value points to the hard minimum powercap limit. The powercap set above
+  this limit is guaranteed unless there is a hardware failure
+
+Powercap handle uses the following encoding: ::
+
+        | Class |    Reserved   | Attribute |
+        |-------|---------------|-----------|
+
+Note: The format of the powercap handle is ``NOT`` ABI and may change in
+the future.
+
+.. code-block:: dts
+
+   power-mgt {
+     powercap {
+        compatible = "ibm,opal-powercap";
+
+        system-powercap {
+                name = "system-powercap";
+                powercap-current = <0x00000002>;
+                powercap-min = <0x00000000>;
+                powercap-max = <0x00000001>;
+                powercap-hard-min = <0x000000003>;
+        };
+     };
+    };