spi_nor_offset_to_banks
spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);