AW_SPI_TCR
reg = AW_SPI_READ_4(sc, AW_SPI_TCR);
AW_SPI_WRITE_4(sc, AW_SPI_TCR, reg);
reg = AW_SPI_READ_4(sc, AW_SPI_TCR);
AW_SPI_WRITE_4(sc, AW_SPI_TCR, reg);
reg = AW_SPI_READ_4(sc, AW_SPI_TCR);
AW_SPI_WRITE_4(sc, AW_SPI_TCR, reg);