[U-Boot] Problem with attaching UBI partition

[Chin Liang See <clsee@altera.com>]

On Mon, 2016-02-29 at 23:55 +0100, Marek Vasut wrote:
> On 02/24/2016 09:59 AM, Bakhvalov, Denis (Nokia - PL/Wroclaw) wrote:
> > Hello Heiko,
> > 
> > > Which U-Boot version? Which board?
> > 
> > This is U-Boot v2016.03-rc1. I have custom board with socfpga
> > Arria5
> > onboard.
> > 
> > > Where does this leading 0xff come from? There seems a problem
> > > with
> > > your spi nor flash driver?
> > 
> > Yes, you're right. I have problems with the driver. As I mentioned
> > in
> > previous mail when I read the contents from the flash some data is
> > corrupted.
> > 
> > How to find out if the problem is because U-Boot has no support for
> > my flash (Spansion S25FL512S NOR flash with SPI) or I have not
> > proper
> > configured SPI in U-Boot?
> 
> I believe there is a problem with caches , which we still didn't
> identify. CCing Dinh and Chin, as they were the last ones looking
> into this problem.
> 
> For now, try doing "dcache off" before using the QSPI NOR.
> 

We managed to get it work for socfpga. One of the issue dragged me long
is the CONFIG_SPI_FLASH_USE_4K_SECTORS. Need to ensure its not defined
in the defconfig. Hope it helps

Thanks
Chin Liang