5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
50 lines
851 B
ReStructuredText
50 lines
851 B
ReStructuredText
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
|
|
.. c:namespace:: DTV.fe
|
|
|
|
.. _FE_READ_BER:
|
|
|
|
***********
|
|
FE_READ_BER
|
|
***********
|
|
|
|
Name
|
|
====
|
|
|
|
FE_READ_BER
|
|
|
|
.. attention:: This ioctl is deprecated.
|
|
|
|
Synopsis
|
|
========
|
|
|
|
.. c:macro:: FE_READ_BER
|
|
|
|
``int ioctl(int fd, FE_READ_BER, uint32_t *ber)``
|
|
|
|
Arguments
|
|
=========
|
|
|
|
``fd``
|
|
File descriptor returned by :c:func:`open()`.
|
|
|
|
``ber``
|
|
The bit error rate is stored into \*ber.
|
|
|
|
Description
|
|
===========
|
|
|
|
This ioctl call returns the bit error rate for the signal currently
|
|
received/demodulated by the front-end. For this command, read-only
|
|
access to the device is sufficient.
|
|
|
|
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.
|