--- zzzz-none-000/linux-3.10.107/include/linux/mtd/mtd.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/mtd/mtd.h	2021-02-04 17:41:59.000000000 +0000
@@ -29,9 +29,6 @@
 
 #include <asm/div64.h>
 
-#define MTD_CHAR_MAJOR 90
-#define MTD_BLOCK_MAJOR 31
-
 #define MTD_ERASE_PENDING	0x01
 #define MTD_ERASING		0x02
 #define MTD_ERASE_SUSPEND	0x04
@@ -58,6 +55,10 @@
 	u_long priv;
 	u_char state;
 	struct erase_info *next;
+
+	u8 *erase_buf;
+	u32 erase_buf_ofs;
+	bool partial_start;
 };
 
 struct mtd_erase_region_info {
@@ -173,6 +174,9 @@
 	/* ECC layout structure pointer - read only! */
 	struct nand_ecclayout *ecclayout;
 
+	/* the ecc step size. */
+	unsigned int ecc_step_size;
+
 	/* max number of correctible bit errors per ecc step */
 	unsigned int ecc_strength;
 
@@ -204,12 +208,12 @@
 			  struct mtd_oob_ops *ops);
 	int (*_write_oob) (struct mtd_info *mtd, loff_t to,
 			   struct mtd_oob_ops *ops);
-	int (*_get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf,
-				    size_t len);
+	int (*_get_fact_prot_info) (struct mtd_info *mtd, size_t len,
+				    size_t *retlen, struct otp_info *buf);
 	int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from,
 				    size_t len, size_t *retlen, u_char *buf);
-	int (*_get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf,
-				    size_t len);
+	int (*_get_user_prot_info) (struct mtd_info *mtd, size_t len,
+				    size_t *retlen, struct otp_info *buf);
 	int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from,
 				    size_t len, size_t *retlen, u_char *buf);
 	int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to,
@@ -222,10 +226,12 @@
 	int (*_lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 	int (*_unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 	int (*_is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
+	int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
 	int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
 	int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
 	int (*_suspend) (struct mtd_info *mtd);
 	void (*_resume) (struct mtd_info *mtd);
+	void (*_reboot) (struct mtd_info *mtd);
 	/*
 	 * If the driver is something smart, like UBI, it may need to maintain
 	 * its own reference counting. The below functions are only for driver.
@@ -252,6 +258,17 @@
 	int usecount;
 };
 
+static inline void mtd_set_of_node(struct mtd_info *mtd,
+				   struct device_node *np)
+{
+	mtd->dev.of_node = np;
+}
+
+static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd)
+{
+	return mtd->dev.of_node;
+}
+
 int mtd_erase(struct mtd_info *mtd, struct erase_info *instr);
 int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
 	      void **virt, resource_size_t *phys);
@@ -278,12 +295,12 @@
 	return mtd->_write_oob(mtd, to, ops);
 }
 
-int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
-			   size_t len);
+int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
+			   struct otp_info *buf);
 int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
 			   size_t *retlen, u_char *buf);
-int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf,
-			   size_t len);
+int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
+			   struct otp_info *buf);
 int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
 			   size_t *retlen, u_char *buf);
 int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len,
@@ -302,6 +319,7 @@
 int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
 int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
 int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len);
+int mtd_block_isreserved(struct mtd_info *mtd, loff_t ofs);
 int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs);
 int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs);
 
@@ -331,6 +349,24 @@
 	return do_div(sz, mtd->erasesize);
 }
 
+static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd)
+{
+	if (mtd_mod_by_eb(sz, mtd) == 0)
+		return sz;
+
+	/* Round up to next erase block */
+	return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize;
+}
+
+static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd)
+{
+	if (mtd_mod_by_eb(sz, mtd) == 0)
+		return sz;
+
+	/* Round down to the start of the current erase block */
+	return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize;
+}
+
 static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
 {
 	if (mtd->writesize_shift)
@@ -351,6 +387,11 @@
 	return mtd->_read_oob && mtd->_write_oob;
 }
 
+static inline int mtd_type_is_nand(const struct mtd_info *mtd)
+{
+	return mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH;
+}
+
 static inline int mtd_can_have_bb(const struct mtd_info *mtd)
 {
 	return !!mtd->_block_isbad;
@@ -401,4 +442,6 @@
 	return mtd_is_bitflip(err) || mtd_is_eccerr(err);
 }
 
+unsigned mtd_mmap_capabilities(struct mtd_info *mtd);
+
 #endif /* __MTD_MTD_H__ */