LOONGSON_SPI_SPER_REG
loongson_spi->sper = loongson_spi_read_reg(loongson_spi, LOONGSON_SPI_SPER_REG);
loongson_spi_write_reg(loongson_spi, LOONGSON_SPI_SPER_REG, loongson_spi->sper);
val = loongson_spi_read_reg(loongson_spi, LOONGSON_SPI_SPER_REG);
loongson_spi_write_reg(loongson_spi, LOONGSON_SPI_SPER_REG, val |