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nand: yaffs: Remove the "nand write.yaffs" command

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This command is only enabled by one board, complicates the NAND code,
and doesn't appear to have been functioning properly for several
years.  If there are no bad blocks in the NAND region being written
nand_write_skip_bad() will take the shortcut of calling nand_write()
which bypasses the special yaffs handling.  This causes invalid YAFFS
data to be written. See
http://lists.denx.de/pipermail/u-boot/2011-September/102830.html for
an example and a potential workaround.

U-Boot still retains the ability to mount and access YAFFS partitions
via CONFIG_YAFFS2.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
This commit is contained in:
Peter Tyser 2015-02-03 11:58:16 -06:00 • committed by Scott Wood
parent 073adf987e
commit 004a1fdb45
5 changed files with 14 additions and 87 deletions
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15
common/cmd_nand.c
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@ -704,16 +704,6 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
maxsize, (u_char *)addr,
WITH_DROP_FFS | WITH_WR_VERIFY);
#endif
#ifdef CONFIG_CMD_NAND_YAFFS
} else if (!strcmp(s, ".yaffs")) {
if (read) {
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
}
ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
maxsize, (u_char *)addr,
WITH_YAFFS_OOB | WITH_WR_VERIFY);
#endif
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
@ -856,11 +846,6 @@ static char nand_help_text[] =
" write 'size' bytes starting at offset 'off' from memory address\n"
" 'addr', skipping bad blocks and dropping any pages at the end\n"
" of eraseblocks that contain only 0xFF\n"
#endif
#ifdef CONFIG_CMD_NAND_YAFFS
"nand write.yaffs - addr off|partition size\n"
" write 'size' bytes starting at offset 'off' with yaffs format\n"
" from memory address 'addr', skipping bad blocks.\n"
#endif
"nand erase[.spread] [clean] off size - erase 'size' bytes "
"from offset 'off'\n"