[U-Boot] Handling dual die and single die flash on same board

[Chris Packham <judge.packham@gmail.com>]

On 07/09/10 10:26, Stefan Roese wrote:
> Hi Chris,
> 
> On Tuesday 07 September 2010 19:05:46 Chris Packham wrote:
>> My u-boot config is currently setup for the 2x32MB case i.e.
>> CONFIG_SYS_MAX_FLASH_BANKS = 2, CONFIG_SYS_FLASH_BANKS_LIST = {base,
>> base+32MB}. The problem with this is that when flash_get_size is called
>> on the 1x64 chip it discovers the same chip the 2nd time around and
>> promptly walks off the end of the memory area I have allocated for it.
>>
>> Is there any existing way to make the cfi_flash driver handle this
>> situation for me?
> 
> I just recently sent a patchset for the CFI driver that could help to handle 
> such a situation. Here the most interesting patch:
> 
> http://www.mail-archive.com/u-boot at lists.denx.de/msg37234.html
> 
> I would suggest to set CONFIG_SYS_MAX_FLASH_BANKS_DETECT to 2 and then add 
> some board specific code to determine the real bank count and set 
> cfi_flash_num_flash_banks accordingly.
> 

Thanks for the pointers. For now I've followed the example in tqm834x.c.
I've done it in such a way that when we next pull in upstream u-boot it
should co-exists nicely with your proposed patch.