spi_mem_dirmap_read
ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf);
nbytes = spi_mem_dirmap_read(nor->dirmap.rdesc, op.addr.val,
EXPORT_SYMBOL_GPL(spi_mem_dirmap_read);
ssize_t spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,