diff options
Diffstat (limited to 'include/linux/mtd/mtd.h')
| -rw-r--r-- | include/linux/mtd/mtd.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 3aa5d77c2cdb..5675b63a0631 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -11,6 +11,7 @@ #include <linux/module.h> #include <linux/uio.h> #include <linux/notifier.h> +#include <linux/device.h> #include <linux/mtd/compatmac.h> #include <mtd/mtd-abi.h> @@ -162,6 +163,20 @@ struct mtd_info { /* We probably shouldn't allow XIP if the unpoint isn't a NULL */ void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len); + /* Allow NOMMU mmap() to directly map the device (if not NULL) + * - return the address to which the offset maps + * - return -ENOSYS to indicate refusal to do the mapping + */ + unsigned long (*get_unmapped_area) (struct mtd_info *mtd, + unsigned long len, + unsigned long offset, + unsigned long flags); + + /* Backing device capabilities for this device + * - provides mmap capabilities + */ + struct backing_dev_info *backing_dev_info; + int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); @@ -223,6 +238,7 @@ struct mtd_info { void *priv; struct module *owner; + struct device dev; int usecount; /* If the driver is something smart, like UBI, it may need to maintain @@ -233,6 +249,11 @@ struct mtd_info { void (*put_device) (struct mtd_info *mtd); }; +static inline struct mtd_info *dev_to_mtd(struct device *dev) +{ + return dev ? container_of(dev, struct mtd_info, dev) : NULL; +} + static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) { if (mtd->erasesize_shift) |