ad7291_i2c_read
if (ad7291_i2c_read(chip, AD7291_T_ALERT_STATUS, &t_status))
if (ad7291_i2c_read(chip, AD7291_VOLTAGE_ALERT_STATUS, &v_status))
ret = ad7291_i2c_read(chip, ad7291_threshold_reg(chan, dir, info),