A3700_SPI_DATA_OUT_REG
spireg_write(a3700_spi, A3700_SPI_DATA_OUT_REG, cpu_to_le32(val));
spireg_write(a3700_spi, A3700_SPI_DATA_OUT_REG, 0);
spireg_write(a3700_spi, A3700_SPI_DATA_OUT_REG, val);