LOONGSON_SPI_SPSR_REG
ret = readb_poll_timeout(loongson_spi->base + LOONGSON_SPI_SPSR_REG,
loongson_spi_write_reg(loongson_spi_dev, LOONGSON_SPI_SPSR_REG,
loongson_spi->spsr = loongson_spi_read_reg(loongson_spi, LOONGSON_SPI_SPSR_REG);
loongson_spi_write_reg(loongson_spi, LOONGSON_SPI_SPSR_REG, loongson_spi->spsr);