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-rw-r--r--doc/README.nand10
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/README.nand b/doc/README.nand
index 8eedb6c..751b693 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -78,6 +78,16 @@ Commands:
should work well, but loading an image copied from another flash is
going to be trouble if there are any bad blocks.
+ nand write.trimffs addr ofs|partition size
+ Enabled by the CONFIG_CMD_NAND_TRIMFFS macro. This command will write to
+ the NAND flash in a manner identical to the 'nand write' command
+ described above -- with the additional check that all pages at the end
+ of eraseblocks which contain only 0xff data will not be written to the
+ NAND flash. This behaviour is required when flashing UBI images
+ containing UBIFS volumes as per the UBI FAQ[1].
+
+ [1] http://www.linux-mtd.infradead.org/doc/ubi.html#L_flasher_algo
+
nand write.oob addr ofs|partition size
Write `size' bytes from `addr' to the out-of-band data area
corresponding to `ofs' in NAND flash. This is limited to the 16 bytes