diff -drupN a/drivers/mtd/aw-spinand/sunxi-common.c b/drivers/mtd/aw-spinand/sunxi-common.c
--- a/drivers/mtd/aw-spinand/sunxi-common.c	1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/mtd/aw-spinand/sunxi-common.c	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,73 @@
+/*
+ * sunxi-nftl-core.c for  sunxi spi nand base on nftl.
+ *
+ * Copyright (C) 2019 Allwinner.
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#define pr_fmt(fmt) "sunxi-spinand: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/of.h>
+#include <linux/spi/spi.h>
+#include <linux/sunxi-sid.h>
+#include <linux/uaccess.h>
+
+#include "sunxi-spinand.h"
+
+static int ubootblks = -1;
+module_param(ubootblks, int, 0400);
+MODULE_PARM_DESC(ubootblks, "block count for uboot");
+
+void aw_spinand_uboot_blknum(struct aw_spinand *spinand, unsigned int *start,
+		unsigned int *end)
+{
+	struct aw_spinand_chip *chip = spinand_to_chip(spinand);
+	struct aw_spinand_info *info = chip->info;
+	unsigned int blksize = info->phy_block_size(chip);
+	unsigned int pagecnt = blksize / info->phy_page_size(chip);
+	unsigned int _start, _end;
+
+	/* small nand:block size < 1MB;  reserve 4M for uboot */
+	if (blksize <= SZ_128K) {
+		_start = UBOOT_START_BLOCK_SMALLNAND;
+		_end = _start + 32;
+	} else if (blksize <= SZ_256K) {
+		_start = UBOOT_START_BLOCK_SMALLNAND;
+		_end = _start + 16;
+	} else if (blksize <= SZ_512K) {
+		_start = UBOOT_START_BLOCK_SMALLNAND;
+		_end = _start + 8;
+	} else if (blksize <= SZ_1M && pagecnt <= 128) {
+		_start = UBOOT_START_BLOCK_SMALLNAND;
+		_end = _start + 4;
+		/* big nand;  reserve at least 20M for uboot */
+	} else if (blksize <= SZ_1M && pagecnt > 128) {
+		_start = UBOOT_START_BLOCK_BIGNAND;
+		_end = _start + 20;
+	} else if (blksize <= SZ_2M) {
+		_start = UBOOT_START_BLOCK_BIGNAND;
+		_end = _start + 10;
+	} else {
+		_start = UBOOT_START_BLOCK_BIGNAND;
+		_end = _start + 8;
+	}
+
+	if (ubootblks > 0)
+		_end = _start + ubootblks;
+	else
+		/* update parameter to /sys */
+		ubootblks = _end - _start;
+
+	if (start)
+		*start = _start;
+	if (end)
+		*end = _end;
+}
+EXPORT_SYMBOL(aw_spinand_uboot_blknum);
+
+MODULE_AUTHOR("cuizhikui <cuizhikui@allwinnertech.com>");
+MODULE_DESCRIPTION("Allwinner's spinand mtd and nftl driver common port");