[U-Boot] Multiple chip support in ndfc driver

[Felix Radensky <felix@embedded-sol.com>]

Hi Stefan,

Thanks for a prompt reply.

Stefan Roese wrote:
> Hi Felix,
>
> On Sunday 05 December 2010 15:27:02 Felix Radensky wrote:
>   
>> On a custom 460EX board I have a 2Gbyte NAND device, 1Gbyte per chip
>> select. I'm trying to enable support for the second NAND CS, so far
>> without success.
>>
>> U-Boot properly detects both devices, (manufacturer, size, bus width).
>> First device
>> works as expected, on second device bad blocks are reported correctly,
>> but attempt
>> to erase the device results in I/O errors on every block. The bank
>> settings are identical
>> for both chips.
>>
>> What am I missing ?
>>     
>
> Perhaps a misconfiguration in your board config header? How did you configure 
> the NAND driver? Take a look at DU440.h or bamboo.h for example. Those boards 
> use multiple NAND devices.
>  
>   
Thanks for the hint. I've looked at these boards, and I cannot see 
what's wrong with my configuration.
Since second chip is properly detected, I think configuration is 
correct. Read also works, only erase
and program fail. Looks like a hardware problem to me.
>> BTW, I was wandering why NAND TLB window size on Canyonlands is 16Mbytes.
>>     
>
> Yes. This TLB could be smaller. 1KiB should be enough. Patch welcome. ;)
>
>   
OK, I'll send the patch.

Felix.