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Diffstat (limited to 'Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst')
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diff --git a/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst b/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst new file mode 100644 index 000000000000..de99bf5fbf0e --- /dev/null +++ b/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst @@ -0,0 +1,52 @@ +.. -*- 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. |