The attached patch updates my previous patch of Sept 9th, 2006 for the latest versions of U-Boot and YAFFS.
It adds two sub-commands, "write.yaffs" and "write.yaffs1", to the nand command set, which write YAFFS filesystem images generated by mkyaffs2image and mkyaffsimage from RAM to NAND flash.
YAFFS images cannot be written using the normal nand write command because they contain data which must be written to the NAND OOB area.
The "write.yaffs" command writes images generated by mkyaffs2image for 2048+64 NAND chips. I do not have access to this type of chip, so it has not been tested (any takers?).
The "write.yaffs1" command writes images generated by mkyaffsimage for 512+16 NAND. It writes the older yaffs1 OOB format used by Linux kernels before 2.6.18, or, by defining a CFG parameter, it writes the newer OOB format used by Linux 2.6.18 and up.
This patch is much simpler than the previous version because the new nand_util.c code contains most of the required functionality. It uses two CFG parameters:
CFG_NAND_WRITE_YAFFS - enables the YAFFS writing code.
CFG_NAND_WRITE_YAFFS1_NEW_OOB_LAYOUT - writes the OOB data in the format used by Linux 2.6.18 and up.
I find it VERY convenient to write YAFFS filesystems in U-Boot, especially the Linux root filesystem. Without this patch, I need to maintain a separate non-YAFFS root filesystem in NAND so that I can boot Linux in order to update my YAFFS root filesystem. This wastes valuable NAND space and is more time-consuming.
Signed-off-by: Frank Mandarino fmandarino@endrelia.com
Regards, ../fam