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+.. SPDX-License-Identifier: GPL-2.0
+
+====
+GPIO
+====
+
+.. toctree::
+ :maxdepth: 1
+
+ Character Device Userspace API <chardev>
+ Obsolete Userspace APIs <obsolete>
+
+.. only:: subproject and html
+
+ Indices
+ =======
+
+ * :ref:`genindex`