Hello ubooters and yaffsers
I was commissioned to refresh yaffs2 in u-boot and add a mechanism to support dynamic yaffs partition set up (way simpler than screwing around with mtd part) and manual configuration.
Rather than do this as a once off, I set this scripting up so that this can be done at any time (painlessly I hope) to bring in the fresh code (as per Linux patching).
Basically...
Get latest from yaffs git.
cd yaffs2-dir/direct/u-boot
./patch-u-boot.sh uboot-dir
Edit your u-boot config file and add
#define CONFIG_YAFFS2 1
Rebuild u-boot (mrproper probably a Good Idea). Job done.
OK, so how does the new dynamic partition stuff work?
There are 2 new commands: ydevconfig configures a mount point "partition" and ydevls lists the mount points and their state
So for example let us say we want a mount point called foo on NAND device 0 starting at block 55 and ending at block 999.
ydevconfig foo 0 55 999
Now you want to mount it.
ymount foo
Access files and do stuff...
yls foo yls -l foo # more info ymkdir foo/dir ...
You can have multiple mountpoints in use at the same time though they are not allowed to overlap.
inband tags is selected automatically if there is insufficient space in oobavail to store the tags.
Have fun.
Charles