v4.19.13 snapshot.
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
new file mode 100644
index 0000000..11cb0c5
--- /dev/null
+++ b/include/linux/mtd/partitions.h
@@ -0,0 +1,114 @@
+/*
+ * MTD partitioning layer definitions
+ *
+ * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
+ *
+ * This code is GPL
+ */
+
+#ifndef MTD_PARTITIONS_H
+#define MTD_PARTITIONS_H
+
+#include <linux/types.h>
+
+
+/*
+ * Partition definition structure:
+ *
+ * An array of struct partition is passed along with a MTD object to
+ * mtd_device_register() to create them.
+ *
+ * For each partition, these fields are available:
+ * name: string that will be used to label the partition's MTD device.
+ * types: some partitions can be containers using specific format to describe
+ * embedded subpartitions / volumes. E.g. many home routers use "firmware"
+ * partition that contains at least kernel and rootfs. In such case an
+ * extra parser is needed that will detect these dynamic partitions and
+ * report them to the MTD subsystem. If set this property stores an array
+ * of parser names to use when looking for subpartitions.
+ * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition
+ * will extend to the end of the master MTD device.
+ * offset: absolute starting position within the master MTD device; if
+ * defined as MTDPART_OFS_APPEND, the partition will start where the
+ * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block;
+ * if MTDPART_OFS_RETAIN, consume as much as possible, leaving size
+ * after the end of partition.
+ * mask_flags: contains flags that have to be masked (removed) from the
+ * master MTD flag set for the corresponding MTD partition.
+ * For example, to force a read-only partition, simply adding
+ * MTD_WRITEABLE to the mask_flags will do the trick.
+ *
+ * Note: writeable partitions require their size and offset be
+ * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
+ */
+
+struct mtd_partition {
+ const char *name; /* identifier string */
+ const char *const *types; /* names of parsers to use if any */
+ uint64_t size; /* partition size */
+ uint64_t offset; /* offset within the master MTD space */
+ uint32_t mask_flags; /* master MTD flags to mask out for this partition */
+ struct device_node *of_node;
+};
+
+#define MTDPART_OFS_RETAIN (-3)
+#define MTDPART_OFS_NXTBLK (-2)
+#define MTDPART_OFS_APPEND (-1)
+#define MTDPART_SIZ_FULL (0)
+
+
+struct mtd_info;
+struct device_node;
+
+/**
+ * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
+ * @origin: for RedBoot, start address of MTD device
+ */
+struct mtd_part_parser_data {
+ unsigned long origin;
+};
+
+
+/*
+ * Functions dealing with the various ways of partitioning the space
+ */
+
+struct mtd_part_parser {
+ struct list_head list;
+ struct module *owner;
+ const char *name;
+ const struct of_device_id *of_match_table;
+ int (*parse_fn)(struct mtd_info *, const struct mtd_partition **,
+ struct mtd_part_parser_data *);
+ void (*cleanup)(const struct mtd_partition *pparts, int nr_parts);
+};
+
+/* Container for passing around a set of parsed partitions */
+struct mtd_partitions {
+ const struct mtd_partition *parts;
+ int nr_parts;
+ const struct mtd_part_parser *parser;
+};
+
+extern int __register_mtd_parser(struct mtd_part_parser *parser,
+ struct module *owner);
+#define register_mtd_parser(parser) __register_mtd_parser(parser, THIS_MODULE)
+
+extern void deregister_mtd_parser(struct mtd_part_parser *parser);
+
+/*
+ * module_mtd_part_parser() - Helper macro for MTD partition parsers that don't
+ * do anything special in module init/exit. Each driver may only use this macro
+ * once, and calling it replaces module_init() and module_exit().
+ */
+#define module_mtd_part_parser(__mtd_part_parser) \
+ module_driver(__mtd_part_parser, register_mtd_parser, \
+ deregister_mtd_parser)
+
+int mtd_is_partition(const struct mtd_info *mtd);
+int mtd_add_partition(struct mtd_info *master, const char *name,
+ long long offset, long long length);
+int mtd_del_partition(struct mtd_info *master, int partno);
+uint64_t mtd_get_device_size(const struct mtd_info *mtd);
+
+#endif