On Sun, Jan 25, 2015 at 04:19:43PM +0800, Zhou Wang wrote: > On 2015/1/22 16:45, Brian Norris wrote: > > Perhaps you can switch between ECC mode and non-ECC mode? > > I also tried to swith to non-ECC mode to implement raw_write, and it is easy > to do this. > > But, event we do this, it will bring me little help. The reason to implement > raw_write is to > run mtd_nandbiterrs correctly as the discussion above. However, this NAND > controller writes > data and ECC code to flash using different layouts in different modes.
Ugh, that's no fun. GPMI seems to do a similarly silly thing. > So we should also read data > and ECC code from flash, change related bits, then rewrite the data and ECC > code to flash in none-ECC > mode to run mtd_nandbiterrs. It is not easy to do this. > > So my plan is not to implement raw_write hook if this function is just used > in test. OK. There may eventually be good reasons to do this still, but it's not important right now. Brian -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
