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Diffstat (limited to 'Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst')
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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 000000000..40d7320f8 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst @@ -0,0 +1,52 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _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:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE + +``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`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. |