ni_tio_set_gate_src
EXPORT_SYMBOL_GPL(ni_tio_set_gate_src);
ret = ni_tio_set_gate_src(counter, data[1], data[2]);
int ni_tio_set_gate_src(struct ni_gpct *counter, unsigned int gate,
retval = ni_tio_set_gate_src(counter, 0, gate_source);