[PATCH v2 0/9] add EDO feature for gpmi-nand driver

[Marek Vasut]

Dear Huang Shijie,

> > The ONFI nand supports the EDO (extended data out) feature in
> > asynchronous mode when the host controller(such as gpmi-nand)
> > uses a tRC of less then 30ns.
> > 
> > The gpmi can supports this EDO feature.
> > This patch set adds the EDO support the gpmi-nand driver.
> > 
> > patch 1 ~ patch 2:
> > 	 These two patches provide the infrastructure for the EDO feature.
> > 	 
> >          They add necessary MTD helpers for the ONFI nand set/get
> >          features,
> > 	 
> > 	 and the help to get the supportted timing mode.
> > 	 These two patches are new version. The init version has been
> > 	 reviewed by Vikram & Florian.
> > 
> > patch 3 ~ patch 7:
> >          These patches are clean-ups for the gpmi-nand's timing code.
> > 	 
> > 	 Also they make the some preparations for the EDO patch.
> > 
> > patch 8: add the EDO feature to the gpmi-nand.
> > 
> > 
> > patch 9: a small optimization for the timing.
> > 
> >          only set the timing registers one time.
> > 
> > I tested this patch set on the IMX6Q-arm2 board with several Micron's
> > ONFI nand chips. Some chips only can supports to mode 4, some chips
> > can supports to mode 5.
> > 
> > The performance is much improved. Take Micron MT29F32G08MAA for example
> 
> > (in mode 5, 100MHz):
> [...]
> 
> Was this ever tested on something else than mx6q? I suspect these broke
> gpmi nand on mx28. Can you please verify?

Hm, this series isnt the problematic one ... poking further ... I recall next 
20120921 worked fine.

Best regards,
Marek Vasut