media: docs: move uAPI book to userspace-api/media

Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee3862 ("docs: Create a user-space API guide").

As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.

Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.

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

1 files changed, 53 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst
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+.. Permission is granted to copy, distribute and/or modify this
+.. document under the terms of the GNU Free Documentation License,
+.. Version 1.1 or any later version published by the Free Software
+.. Foundation, with no Invariant Sections, no Front-Cover Texts
+.. and no Back-Cover Texts. A copy of the license is included at
+.. Documentation/userspace-api/media/fdl-appendix.rst.
+..
+.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
+
+.. _FE_DISEQC_RESET_OVERLOAD:
+
+******************************
+ioctl FE_DISEQC_RESET_OVERLOAD
+******************************
+
+Name
+====
+
+FE_DISEQC_RESET_OVERLOAD - Restores the power to the antenna subsystem, if it was powered off due - to power overload.
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, FE_DISEQC_RESET_OVERLOAD, NULL )
+    :name: FE_DISEQC_RESET_OVERLOAD
+
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+Description
+===========
+
+If the bus has been automatically powered off due to power overload,
+this ioctl call restores the power to the bus. The call requires
+read/write access to the device. This call has no effect if the device
+is manually powered off. Not all Digital TV adapters support this ioctl.
+
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.