LPSS_GENERAL
offset = pdata->dev_desc->prv_offset + LPSS_GENERAL;
ret = lpss_reg_read(dev, LPSS_GENERAL, <r_mode);
ltr_mode = __lpss_reg_read(pdata, LPSS_GENERAL);
__lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);
__lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);