1 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst
new file mode 100644
index 000000000000..9bdf1e898ddc
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst
@@ -0,0 +1,61 @@
+.. 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_ENABLE_HIGH_LNB_VOLTAGE:
+
+********************************
+ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
+********************************
+
+Name
+====
+
+FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high )
+    :name: FE_ENABLE_HIGH_LNB_VOLTAGE
+
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+``high``
+    Valid flags:
+
+    -  0 - normal 13V and 18V.
+
+    -  >0 - enables slightly higher voltages instead of 13/18V, in order
+       to compensate for long antenna cables.
+
+
+Description
+===========
+
+Select output DC level between normal LNBf voltages or higher LNBf
+voltages between 0 (normal) or a value grater than 0 for higher
+voltages.
+
+
+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.