BATTERY_MODE_OFFSET
int val = sbs_read_word_data(chip->client, BATTERY_MODE_OFFSET);
val = sbs_write_word_data(chip->client, BATTERY_MODE_OFFSET, val);
original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET);
ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret);