QUP_STATE
reg = QCOM_SPI_READ_4(sc, QUP_STATE);
cur_state = QCOM_SPI_READ_4(sc, QUP_STATE);
QCOM_SPI_WRITE_4(sc, QUP_STATE, QUP_STATE_CLEAR);
QCOM_SPI_WRITE_4(sc, QUP_STATE, QUP_STATE_CLEAR);
QCOM_SPI_WRITE_4(sc, QUP_STATE, cur_state);
cur_state = QCOM_SPI_READ_4(sc, QUP_STATE);