Mark all partitions except full PNOR and boot kernel firmware read only

FFS partitions don't always align on erase blocks.  Mark any paritions
not known to align on erase blocks as read only to prevent silent corruption
of adjacent partitions during erase / write from the host.

Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

core/flash.c

@@ -279,6 +279,13 @@ static struct dt_node *flash_add_dt_node(struct flash *flash, int id)
 		partition_node = dt_new_addr(partition_container_node, "partition", ffs_part_start);
 		dt_add_property_strings(partition_node, "label", name);
 		dt_add_property_cells(partition_node, "reg", ffs_part_start, ffs_part_size);
+		if (part_name_map[i].id != RESOURCE_ID_KERNEL_FW) {
+			/* Mark all partitions other than the full PNOR and the boot kernel
+			 * firmware as read only.  These two partitions are the only partitions
+			 * that are properly erase block aligned at this time.
+			 */
+			dt_add_property(partition_node, "read-only", NULL, 0);
+		}
 	}
 
 	partition_node = dt_new_addr(partition_container_node, "partition", 0);