diff options
| author | Mike Looijmans <mike.looijmans@topic.nl> | 2025-04-08 07:46:38 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-04-30 11:13:35 -0600 |
| commit | 98a898e58499c78245e4fe36ee404b1b1208e32b (patch) | |
| tree | 7a67a06cf81beb7bcda64e0f6830e4a6739ee142 | |
| parent | aa96cda0a58f4d181b81a897b0b9fea3d9729478 (diff) | |
mtd: mtdpart: Support MTDPART_SIZ_FULL in fixed-partitions
Flash partitions may specify MTDPART_SIZ_FULL (=0) as the size of the
partition to indicate "the remainder of the flash". Make this work with
device-tree "fixed-partitions" as well.
This makes MTD partitioning compatible with the Linux kernel, see:
https://github.com/torvalds/linux/blob/master/include/linux/mtd/partitions.h#L29
https://github.com/torvalds/linux/blob/master/drivers/mtd/mtdpart.c#L123
Previously, this could only be done through MTDPARTS so this change allows
boards like topic_miami to migrate from `mtdparts`/`mtdids` to devicetree
partitions.
Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
| -rw-r--r-- | drivers/mtd/mtdpart.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index 99bea6f1c85..842d3e7274e 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -909,11 +909,13 @@ int add_mtd_partitions_of(struct mtd_info *master) continue; offset = ofnode_get_addr_size_index_notrans(child, 0, &size); - if (offset == FDT_ADDR_T_NONE || !size) { - debug("Missing partition offset/size on \"%s\" partition\n", + if (offset == FDT_ADDR_T_NONE) { + debug("Missing partition offset on \"%s\" partition\n", master->name); continue; } + if (size == MTDPART_SIZ_FULL) + size = master->size - offset; part.name = ofnode_read_string(child, "label"); if (!part.name) |