openwrtv3/target/linux/ramips/patches-4.14/0040-nand-hack.patch

--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1908,6 +1908,9 @@ static int nand_do_read_ops(struct mtd_i
 						 __func__, buf);
 
 read_retry:
+#ifdef CONFIG_MTK_MTD_NAND
+			ret = chip->read_page(mtd, chip, bufpoi, page);
+#else
 			if (nand_standard_page_accessors(&chip->ecc))
 				chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
 
@@ -1927,6 +1930,7 @@ read_retry:
 			else
 				ret = chip->ecc.read_page(mtd, chip, bufpoi,
 							  oob_required, page);
+#endif
 			if (ret < 0) {
 				if (use_bufpoi)
 					/* Invalidate page cache */
@@ -2761,9 +2765,14 @@ static int nand_do_write_ops(struct mtd_
 			memset(chip->oob_poi, 0xff, mtd->oobsize);
 		}
 
-		ret = nand_write_page(mtd, chip, column, bytes, wbuf,
-				      oob_required, page,
-				      (ops->mode == MTD_OPS_RAW));
+		if (chip->write_page)
+			ret = chip->write_page(mtd, chip, column, bytes, wbuf,
+					       oob_required, page,
+					       (ops->mode == MTD_OPS_RAW));
+		else
+			ret = nand_write_page(mtd, chip, column, bytes, wbuf,
+					      oob_required, page,
+					      (ops->mode == MTD_OPS_RAW));
 		if (ret)
 			break;
 
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -885,6 +885,9 @@ struct nand_chip {
 	int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
 	int (*erase)(struct mtd_info *mtd, int page);
 	int (*scan_bbt)(struct mtd_info *mtd);
+	int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
+			uint32_t offset, int data_len, const uint8_t *buf,
+			int oob_required, int page, int raw);
 	int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
 			int feature_addr, uint8_t *subfeature_para);
 	int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
@@ -893,6 +896,9 @@ struct nand_chip {
 	int (*setup_data_interface)(struct mtd_info *mtd, int chipnr,
 				    const struct nand_data_interface *conf);
 
+#ifdef CONFIG_MTK_MTD_NAND
+	int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, u8 *buf, int page);
+#endif /* CONFIG_MTK_MTD_NAND */
 
 	int chip_delay;
 	unsigned int options;