trf7970a_write
ret = trf7970a_write(trf, TRF7970A_REG_IO_CTRL,
ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
ret = trf7970a_write(trf, TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS,
ret = trf7970a_write(trf, TRF7970A_SPECIAL_FCN_REG1, 0);
trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL, trf->chip_status_ctrl);
ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
ret = trf7970a_write(trf, TRF7970A_SPECIAL_FCN_REG1,
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
ret = trf7970a_write(trf, TRF7970A_RX_SPECIAL_SETTINGS,
ret = trf7970a_write(trf, TRF7970A_REG_IO_CTRL,
ret = trf7970a_write(trf, TRF7970A_NFC_LOW_FIELD_LEVEL,
ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL,
ret = trf7970a_write(trf, TRF7970A_RX_SPECIAL_SETTINGS, reg);
ret = trf7970a_write(trf, TRF7970A_ISO_CTRL, iso_ctrl);
ret = trf7970a_write(trf,