[U-Boot] [PATCH] [v2] p1022ds: use weak CFI flash accessors when DIU is enabled

[Wolfgang Denk]

Dear Timur Tabi,

In message <1284667916-11233-1-git-send-email-timur at freescale.com> you wrote:
> On the Freescale P1022, the DIU and the LBC share address pins, which means
> that when the DIU is active (e.g. the console is on the DVI display), NOR flash
> cannot be accessed.  So we use the weak accessor function feature of the CFI
> flash code to temporarily switch the pin mux from LBC to DIU whenever we want
> to read or write flash.  This has a significant performance penalty, but it's
> the only way to make it work.
> 
> This change allows the 'saveenv' command to work when the video display is
> enabled.  Writing to flash with the 'cp' command works, but reading from flash
> with the 'md' and 'cp' commands does not.  Also, while flash is being written
> to, the video display will be blank.
> 
> Signed-off-by: Timur Tabi <timur at freescale.com>
> ---
> 
> v2: found another place to use the PMUXCR_ELBCDIU_xxx macros

Same comments as previous version.

Best regards,

Wolfgang Denk

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