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mtd: add an ioctl to query the lock status of a flash sector

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This patchs adds a way for user space programs to find out whether a
flash sector is locked. An optional driver method in the mtd_info struct
provides the information.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Richard Cochran
2010-06-14 18:10:33 +02:00
committed by David Woodhouse
parent 1df620637f
commit 9938424f0c
5 changed files with 36 additions and 0 deletions
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10
drivers/mtd/chips/cfi_cmdset_0001.c
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@@ -63,6 +63,8 @@ static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *);
static void cfi_intelext_sync (struct mtd_info *);
static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs,
uint64_t len);
#ifdef CONFIG_MTD_OTP
static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
@@ -448,6 +450,7 @@ struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
mtd->sync = cfi_intelext_sync;
mtd->lock = cfi_intelext_lock;
mtd->unlock = cfi_intelext_unlock;
mtd->is_locked = cfi_intelext_is_locked;
mtd->suspend = cfi_intelext_suspend;
mtd->resume = cfi_intelext_resume;
mtd->flags = MTD_CAP_NORFLASH;
@@ -2139,6 +2142,13 @@ static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
return ret;
}
static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs,
uint64_t len)
{
return cfi_varsize_frob(mtd, do_getlockstatus_oneblock,
ofs, len, NULL) ? 1 : 0;
}
#ifdef CONFIG_MTD_OTP
typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip,