dvb_frontend_sleep_until — Sleep for the amount of time given by add_usec parameter
void dvb_frontend_sleep_until ( | ktime_t * waketime, |
u32 add_usec); |
This function is used to measure the time required for the
FE_DISHNETWORK_SEND_LEGACY_CMD ioctl to work. It needs to be as precise
as possible, as it affects the detection of the dish tone command at the
satellite subsystem.
Its used internally by the DVB frontend core, in order to emulate
FE_DISHNETWORK_SEND_LEGACY_CMD using the dvb_frontend_ops.set_voltage
callback.
it should not be used at the drivers, as the emulation for the
legacy callback is provided by the Kernel. The only situation where this
should be at the drivers is when there are some bugs at the hardware that
would prevent the core emulation to work. On such cases, the driver would
be writing a dvb_frontend_ops.dishnetwork_send_legacy_command and
calling this function directly.