[OE-core] [PATCH v2] image_types.bbclass: Added default argument for ubi and ubifs image creation

[yin.thong.choong at intel.com]

From: Choong YinThong <yin.thong.choong at intel.com>

Added default argument for ubi and ubifs image creation.
MKUBIFS_ARGS and UBINIZE_ARGS both argument still able to
edit in local.conf

[YOCTO #11589]

Signed-off-by: Choong YinThong <yin.thong.choong at intel.com>
---
 meta/classes/image_types.bbclass | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 7749b00..bbde08d 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -292,3 +292,12 @@ IMAGE_EXTENSION_live = "hddimg iso"
 # The IMAGE_TYPES_MASKED variable will be used to mask out from the IMAGE_FSTYPES,
 # images that will not be built at do_rootfs time: vmdk, vdi, qcow2, hdddirect, hddimg, iso, etc.
 IMAGE_TYPES_MASKED ?= ""
+
+# Default argument to create ubi and ubifs image with core-image-sato-sdk (http://www.linux-mtd.infradead.org/faq/ubifs.html)
+# -m 2048: tells mkfs.ubifs that the minimum input/output unit size of the flash this UBIFS image is created for is 2048 bytes (NAND page in this case);
+# -e 129024: logical eraseblock size of the UBI volume this image is created for;
+# -c 8749: specifies maximum file-system size in logical eraseblocks; this means that it will be possible to use the resulting file-system on volumes up to this size (less or equivalent); so in this particular case, the resulting FS may be put on volumes up to about 251MiB (129024 multiplied by 2047); See this section for more details.
+# -p 128KiB: tells ubinize that physical eraseblock size of the flash chip the UBI image is created for is 128KiB (128 * 1024 bytes);
+# -s 512: tells ubinize that the flash supports sub-pages and sub-page size is 512 bytes; ubinize will take this into account and put the VID header to the same NAND page as the EC header.
+MKUBIFS_ARGS ??= " -m 2048 -e 129024 -c 8749 "
+UBINIZE_ARGS ??= " -p 128KiB -m 2048 -s 512 "
-- 
2.7.4