ltc_read_word_data
ret = ltc_read_word_data(client, page, 0xff, reg);
ret = ltc_read_word_data(client, page, 0xff, reg);
ret = ltc_read_word_data(client, page, 0xff,
ret = ltc_read_word_data(client, page, phase,
info->read_word_data = ltc_read_word_data;