[U-Boot-Users] ARM VersatilePB - Fixed flash support

[Wolfgang Denk]

In message <c3d0340b04101409512a20b628 at mail.gmail.com> you wrote:
> 
> >    while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) ;
> > 
> > This worked fine for large amounts of data so the timeout value is
> > probably too low. Let me know if this is the same with your setting.
> 
> Good try. I'm not sure if this is a decent fix. It's possible that

It is not a proper fix, as it might hang the board  without  even  an
error message.

> Flash write gets stuck in while loop if there is a real problem. It
> may be other factor(s) that cause this problem. For example, timer is
> not accurate?

This is one  possible  explanation.  Check  timer  implementation.  I
noticed  that  quite  a  lot  of  boards use insane values of CFG_HZ.
Remember that this should be the  number  of  clock  ticks  (=  timer
interrupts)  per  second,  and  there  is  usually no reason to chose
anything else but the default value of 1000.  Many  boards  use  some
much,  much  higher  clock  values instead. This should be fixed. [We
recently fixed this for AT91RM9200 systems.]

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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