ad4170_set_channel_enable
ret = ad4170_set_channel_enable(st, chan->address, true);
ret2 = ad4170_set_channel_enable(st, chan->address, false);
ret = ad4170_set_channel_enable(st, chan->address, false);
ret = ad4170_set_channel_enable(st, chan_index, true);
ret = ad4170_set_channel_enable(st, i, false);