add_dataflash
status = add_dataflash(spi, "AT45DB011B", 512, 264, 9);
status = add_dataflash(spi, "AT45DB021B", 1024, 264, 9);
status = add_dataflash(spi, "AT45DB041x", 2048, 264, 9);
status = add_dataflash(spi, "AT45DB081B", 4096, 264, 9);
status = add_dataflash(spi, "AT45DB161x", 4096, 528, 10);
status = add_dataflash(spi, "AT45DB321x", 8192, 528, 10);
status = add_dataflash(spi, "AT45DB642x", 8192, 1056, 11);