blob: ce0e8dbee4eb30e3585ab8722e9e5e070ea7532d [file] [log] [blame]
* MTD partitioning layer definitions
* (C) 2000 Nicolas Pitre <>
* This code is GPL
#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.
* 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 */
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 nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only) */
#define MTDPART_SIZ_FULL (0)
struct mtd_info;
struct device_node;
#ifndef __UBOOT__
* struct mtd_part_parser_data - used to pass data to MTD partition parsers.
* @origin: for RedBoot, start address of MTD device
* @of_node: for OF parsers, device node containing partitioning information
struct mtd_part_parser_data {
unsigned long origin;
struct device_node *of_node;
* Functions dealing with the various ways of partitioning the space
struct mtd_part_parser {
struct list_head list;
struct module *owner;
const char *name;
int (*parse_fn)(struct mtd_info *, struct mtd_partition **,
struct mtd_part_parser_data *);
extern void register_mtd_parser(struct mtd_part_parser *parser);
extern void deregister_mtd_parser(struct mtd_part_parser *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);