docs: dt: convert changesets to ReST

- Add a SPDX header;
- Add a document title;
- Some whitespace fixes and new line breaks;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/changesets.rst b/Documentation/devicetree/changesets.rst
new file mode 100644 (file)
index 0000000..c7fd8cd
--- /dev/null
+++ b/Documentation/devicetree/changesets.rst
@@ -0,0 +1,37 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=============
+DT Changesets
+=============
+
+A DT changeset is a method which allows one to apply changes
+in the live tree in such a way that either the full set of changes
+will be applied, or none of them will be. If an error occurs partway
+through applying the changeset, then the tree will be rolled back to the
+previous state. A changeset can also be removed after it has been
+applied.
+
+When a changeset is applied, all of the changes get applied to the tree
+at once before emitting OF_RECONFIG notifiers. This is so that the
+receiver sees a complete and consistent state of the tree when it
+receives the notifier.
+
+The sequence of a changeset is as follows.
+
+1. of_changeset_init() - initializes a changeset
+
+2. A number of DT tree change calls, of_changeset_attach_node(),
+   of_changeset_detach_node(), of_changeset_add_property(),
+   of_changeset_remove_property, of_changeset_update_property() to prepare
+   a set of changes. No changes to the active tree are made at this point.
+   All the change operations are recorded in the of_changeset 'entries'
+   list.
+
+3. of_changeset_apply() - Apply the changes to the tree. Either the
+   entire changeset will get applied, or if there is an error the tree will
+   be restored to the previous state. The core ensures proper serialization
+   through locking. An unlocked version __of_changeset_apply is available,
+   if needed.
+
+If a successfully applied changeset needs to be removed, it can be done
+with of_changeset_revert().

diff --git a/Documentation/devicetree/changesets.txt b/Documentation/devicetree/changesets.txt
deleted file mode 100644 (file)
index cb488ee..0000000
--- a/Documentation/devicetree/changesets.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-A DT changeset is a method which allows one to apply changes
-in the live tree in such a way that either the full set of changes
-will be applied, or none of them will be. If an error occurs partway
-through applying the changeset, then the tree will be rolled back to the
-previous state. A changeset can also be removed after it has been
-applied.
-
-When a changeset is applied, all of the changes get applied to the tree
-at once before emitting OF_RECONFIG notifiers. This is so that the
-receiver sees a complete and consistent state of the tree when it
-receives the notifier.
-
-The sequence of a changeset is as follows.
-
-1. of_changeset_init() - initializes a changeset
-
-2. A number of DT tree change calls, of_changeset_attach_node(),
-of_changeset_detach_node(), of_changeset_add_property(),
-of_changeset_remove_property, of_changeset_update_property() to prepare
-a set of changes. No changes to the active tree are made at this point.
-All the change operations are recorded in the of_changeset 'entries'
-list.
-
-3. of_changeset_apply() - Apply the changes to the tree. Either the
-entire changeset will get applied, or if there is an error the tree will
-be restored to the previous state. The core ensures proper serialization
-through locking. An unlocked version __of_changeset_apply is available,
-if needed.
-
-If a successfully applied changeset needs to be removed, it can be done
-with of_changeset_revert().

diff --git a/Documentation/devicetree/index.rst b/Documentation/devicetree/index.rst
index 7a6aad7..a9757ec 100644 (file)
--- a/Documentation/devicetree/index.rst
+++ b/Documentation/devicetree/index.rst
@@ -9,3 +9,4 @@ Open Firmware and Device Tree
 
    usage-model
    writing-schema
+   changesets