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mtd: partition: implement lock/unlock 

CFI Nor flashes need lock/unlock which is not implemented for partitions.
Fix this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-06-10 13:55:20 +02:00
parent 02fed023e1
commit 70579ca94f
1 changed files with 28 additions and 0 deletions
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28
drivers/mtd/partition.c
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@ -49,6 +49,32 @@ static int mtd_part_erase(struct mtd_info *mtd, struct erase_info *instr)
return ret;
}
static int mtd_part_lock(struct mtd_info *mtd, loff_t offset, size_t len)
{
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
if (offset + len > mtd->size)
return -EINVAL;
offset += mtd->master_offset;
return mtd->master->lock(mtd->master, offset, len);
}
static int mtd_part_unlock(struct mtd_info *mtd, loff_t offset, size_t len)
{
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
if (offset + len > mtd->size)
return -EINVAL;
offset += mtd->master_offset;
return mtd->master->unlock(mtd->master, offset, len);
}
static int mtd_part_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
if (ofs >= mtd->size)
@ -122,6 +148,8 @@ struct mtd_info *mtd_add_partition(struct mtd_info *mtd, off_t offset,
if (IS_ENABLED(CONFIG_MTD_WRITE)) {
part->write = mtd_part_write;
part->erase = mtd_part_erase;
part->lock = mtd_part_lock;
part->unlock = mtd_part_unlock;
part->block_markbad = mtd->block_markbad ? mtd_part_block_markbad : NULL;
}