[PATCH] sunxi-nand: fix the PIO instead of DMA implementation

[Maxime Ripard]

On Thu, Jun 30, 2022 at 09:13:22AM +0200, Miquel Raynal wrote:
> Hi Markus,
> 
> + Maxime, for the record :)
> 
> mhoffrogge at gmail.com wrote on Thu, 30 Jun 2022 01:26:39 +0200:
> 
> > The sunxi nand SPL loader was broken at least for SUN4I,
> > SUN5I and SUN7I SOCs since the implementation change
> > from DMA to PIO usage - commit 6ddbb1e.
> > 
> > Root cause for this issue is the NFC control flag NFC_CTL_RAM_METHOD
> > being set by method nand_apply_config.
> > 
> > This flag controls the bus being used for the NFCs internal RAM access.
> > It must be set for the DMA use case only.
> > See A33_Nand_Flash_Controller_Specification.pdf page 12.
> > 
> > This fix is tested by myself on a Cubietruck A20 board.
> > Others should test it on new generation SOCs as well.
> 
> Good to know that someone tackled this, Maxime already reported some
> time ago that it was broken for a number of boards but I never took the
> time to investigate, apologies.

Oh, that's awesome, thanks for tackling this :)

Maxime
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20220630/cceed1f1/attachment.sig>