dib0090_get_current_gain
EXPORT_SYMBOL(dib0090_get_current_gain);
extern void dib0090_get_current_gain(struct dvb_frontend *fe, u16 * rf, u16 * bb, u16 * rf_gain_limit, u16 * rflt);
dib0090_get_current_gain(fe, NULL, NULL, &rf_gain_limit, <gain);