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>
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 99bea6f..842d3e7 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -909,11 +909,13 @@
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)