[PATCH] NAND: add support for reading ONFI parameters from NAND device

[Matthieu CASTET]

Florian Fainelli a écrit :
> Hi Matthieu,
> 
> On Thursday 29 July 2010 09:54:20 Matthieu CASTET wrote:
>> Hi,
>>
>>
>> Also you don't handle endianness (integer are little endian) for value
>> in nand_onfi_params.
> 
> Yes, so far the drivers using those values were doing the correct endian 
> conversion when they need to use them.
In that case use le16, le32, ... type. Also prefer kernel type over 
uintx_t type.


>> This won't work this unknown nand, and not work with some LP nand that
>> doesn't provide additional id bytes.
> 
> So how do you see things regarding the provisioning of the relevant ONFI 
> parameters?
I will see something like in the patch attached in
http://article.gmane.org/gmane.linux.drivers.mtd/30935.

ONFI parsing is done early in nand_get_flash_type (unknow chip or LP nand).
If the ONFI parsing is ok we bypass the old identification method
(additional id bytes).

As an example I attach a patch that mix your patch and mine.


Matthieu

PS : the NAND_ONFI flags seems useless, we can use onfi_version (0 means 
no onfi).

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