Hello,
I am developing a NAND driver for an SOC and trying to use YAFFS2 with it. Our proprietary flash controller has hardware ECC support. One problem I cannot find a solution for is how to tell yaffs to ignore ECC errors when reading pages from erased blocks.
I am getting a request for full page read with tags, and obviously for an erased block I have to return that there were uncorrectable ECC errors. I would assume that yaffs should be able to tell erased block from real ECC failure. But all I am getting is messages like
**>> yaffs chunk XXXX was not erased
My sequence was to
flash_eraseall /dev/mtd0
mount -t yaffs2 /dev/mtdblock0 /mountpoint
and then any write to the yaffs file system.
I disabled CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED in kernel configuration, but that seems to have no effect on the behavior.
Any help would be much appreciated,
Max.
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