NFC_REG_USER_DATA
user_data = readl(nfc->regs + NFC_REG_USER_DATA(nfc, step));
reg_off = NFC_REG_USER_DATA(nfc, user_data_off + i);
nfc->regs + NFC_REG_USER_DATA(nfc, step));
nfc->regs + NFC_REG_USER_DATA(nfc, user_data_off + i));