[U-Boot] nand onfi 8bit/16bit bus support

[Michal Simek <monstr@monstr.eu>]

On 05/09/2013 11:37 PM, Scott Wood wrote:
> On 05/06/2013 11:53:52 AM, Michal Simek wrote:
>> Hi guys,
>>
>> Zynq supports 8 and 16bit ONFI nand flashes.
>> We can count number of connected pins and from that
>> we know if 8bit or 16bit nand flash is used.
>>
>> I have looked at the code and contains ONFI detection
>> with correct detection of bus width + checking later.
>> Why also not setup proper chip->options for NAND_BUSWIDTH_16?
>>
>> Not sure how others but if driver expect just ONFI devices
>> and support 8 and 16bit options why not just to setup
>> chip options based on information from ONFI or
>> not check that (busw != (chip->options & NAND_BUSWIDTH_16))
>> for onfi case.
> 
> This is fixed in current Linux, with NAND_BUSWIDTH_AUTO.  
There was a patchset to merge in recent Linux MTD code a while back,
but an expected respin didn't come.  I'll try to fix it up when I process this merge window's patches.

Ok. Nice. That will be really helpful.

Thanks,
Michal


-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform


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