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drivers/mtd_mapper: inherit physical properties

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This commit is contained in:
Benjamin Valentin 2022-05-17 16:19:19 +02:00
parent 055a26d9d2
commit 3d8ba016ec
1 changed files with 14 additions and 4 deletions
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18
drivers/mtd_mapper/mtd_mapper.c
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@ -74,11 +74,21 @@ static int _init(mtd_dev_t *mtd)
mtd_mapper_region_t *region = container_of(mtd, mtd_mapper_region_t, mtd);
mtd_dev_t *backing_mtd = region->parent->mtd;
/* Configuration sanity checks */
assert(backing_mtd->page_size == region->mtd.page_size);
assert(backing_mtd->pages_per_sector == region->mtd.pages_per_sector);
/* inherit physical properties */
if (region->mtd.page_size == 0) {
region->mtd.page_size = backing_mtd->page_size;
}
if (region->mtd.pages_per_sector == 0) {
region->mtd.pages_per_sector = backing_mtd->pages_per_sector;
}
region->mtd.write_size = backing_mtd->write_size;
/* Configuration sanity check */
assert(backing_mtd->page_size >= region->mtd.page_size);
assert(backing_mtd->write_size <= region->mtd.page_size);
assert(region->mtd.page_size * region->mtd.pages_per_sector
== backing_mtd->page_size * backing_mtd->pages_per_sector);
assert(backing_mtd->sector_count >= region->mtd.sector_count);
assert(backing_mtd->write_size == region->mtd.write_size);
/* offset + region size must not exceed the backing device */
assert(region->sector + region->mtd.sector_count <= backing_mtd->sector_count);