Dear Pietro Paolini,
In message 51C80AA5-303E-4737-864C-6D05577D19E7@aol.com you wrote:
I am working on an embedded system which we would like upgrade using a new filesystem YAFFS2 instead of the old JFFS2, we actually mount the JFFS2 partition from U-Boot and then we start the kernel. I looked in the boot source tree we actually use and I did not find YAFFS2 (or UBIFS ..)
Hm... I recommend to look at the mailine U-Boot tree instead:
-> ls fs Makefile cbfs cramfs ext4 fat fdos fs.c jffs2 reiserfs sandbox ubifs yaffs2 zfs
under the fs/ folder, then I assume I don't have it. I'd like add that support without update the whole uboot source tree, is it possible or is too much complicated ?
This depends a lot on which exact version of U-Boot you are running now, but given the fact that you see neither yaffs2 nor ubifs it appears to be _very_ old, so you're probably out of luck.
On the other hand - switching to mainline code is usually a very good idea anyway, so go for that.
Best regards,
Wolfgang Denk