threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
53 lines
1.2 KiB
ReStructuredText
53 lines
1.2 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_DISEQC_SEND_BURST:
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**************************
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ioctl FE_DISEQC_SEND_BURST
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**************************
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Name
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====
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FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.
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Synopsis
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========
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.. c:function:: int ioctl( int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone )
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:name: FE_DISEQC_SEND_BURST
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <frontend_f_open>`.
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``tone``
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An integer enumered value described at :c:type:`fe_sec_mini_cmd`.
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Description
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===========
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This ioctl is used to set the generation of a 22kHz tone burst for mini
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DiSEqC satellite selection for 2x1 switches. This call requires
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read/write permissions.
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It provides support for what's specified at
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`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__
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Return Value
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============
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On success 0 is returned.
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On error -1 is returned, and the ``errno`` variable is set
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appropriately.
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Generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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