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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-08 11:40:06 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-08 11:59:40 -0300
commit60c2820d0f6d3497975b6488e2599f8f611d8b95 (patch)
treeb3b03707c6438ea9b99cc57e847ebf517f968ab1 /Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst
parenta97369b5e21ea9b8b5fef7c0f4f48bbe60c07ca3 (diff)
doc_rst: rename the media Sphinx suff to Documentation/media
The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _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
+========
+
+.. cpp:function:: int ioctl( int fd, int request, unsigned int high )
+
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+``request``
+ FE_ENABLE_HIGH_LNB_VOLTAGE
+
+``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 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.