[U-Boot] Problem with mounting a jffs2 partition on flash.

[Calvin Johnson <calvin.johnson@nxp.com>]

Hi Denis,


> -----Original Message-----
> From: U-Boot [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Wolfgang
> Denk
> Sent: Monday, February 08, 2016 5:53 PM
> To: Bakhvalov, Denis (Nokia - PL/Wroclaw) <denis.bakhvalov@nokia.com>
> Cc: u-boot at lists.denx.de
> Subject: Re: [U-Boot] Problem with mounting a jffs2 partition on flash.
> 
> Dear Denis,
> 
> In message
> <BFEE4BD273371E48B6EB70F96CEC5B54F300DB@DEMUMBX007.nsn-intra.net>
> you wrote:
> >
> 
> > Yes, I'm aware that jffs2 is quite old and ubifs is a successor of
> > jffs2, but the reason is that current Linux Kernel has no support for
> > UBI.
> 
> What do you mean by "current" here?  UBI/UBIFS support in U-Boot was
> actually adapted from the Linux kernel, so Linux support for UBI/UBIFS
> predates the U-Boot code by a long, long time.
> 
> Do you mean you are using a prehistoric Linux kernel version?
> 
> > I understand that it should have solution, but it requires recompiling
> > Linux kernel which is also time consuming.
> 
> Hm... just recompiling is only a matter of seconds (or, on a very slow system,
> minutes max).  I understand there are other concerns that you don't want to
> update?  Please be aware that there it is likely that there other incompatibilities
> / bugs in such an ancient kernel...
> 
> > > What exactly are these "other problems" ?
> >
> > U-Boot launches, but after that it is hanging.
> > U-Boot 2016.01 (Feb 05 2016 - 14:15:47 +0100)
> >
> > CPU:   Altera SoCFPGA Platform
> > FPGA:  Altera Arria V, D5, version 0x0
> > BOOT:  QSPI Flash (3.0V)
> >        Watchdog enabled
> > I2C:   ready
> > DRAM:
> >
> > I will try to tackle this problem also.
> > However, I must say that I don't have much experience with U-Boot, so
> > maybe I'm missing something obvious?
> 
> It appears it is hanging in the DRAM initialization phase.  This is a very common
> issue.  Please make sure your memory configuration is correct.

I would also suggest you to enable DEBUG flag to get more information that helps debug your issues.

> 
> > Can you please share some examples of correct configuration for such
> > use case (jffs2 partition on NOR flash with SPI)?
> 
> You can deal with this later; first you need to have the system running at all.
> You should focus on this first.
> 
> 
> Best regards,
> 
> Wolfgang Denk
> 
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Calvin