Re: [PATCH 2/3] mtd: davinci-nand: add dts property for NAND_NO_SUBPAGE_WRITE option

Santosh Shilimkar
2014-03-20T18:02:39Z

On Thursday 20 March 2014 01:44 PM, Warner Losh wrote:
>
> On Mar 20, 2014, at 11:37 AM, Santosh Shilimkar <santosh.shilimkar@ti.com> wrote:
>
>>
>>
>> On Thursday 20 March 2014 01:29 PM, Brian Norris wrote:
>>> On Thu, Mar 20, 2014 at 01:12:35PM -0400, Santosh Shilimkar wrote:
>>>> Boris,
>>>
>>> Who's Boris? And why should Boris be taking this patch? It's an MTD
>>> patch.
>>>
>> I got your name completely wrong. Sorry....
>>
>>>> On Thursday 20 March 2014 01:06 PM, Ivan Khoronzhuk wrote:
>>>>> From: Murali Karicheri <m-karicheri2@ti.com>
>>>>>
>>>>> After testing NAND flash with ubifs for k2hk-emv board were committed
>>>>> that flash doesn't support subpage writing, so we can fix it by
>>>>> adding a property to disable subpage write.
>>>
>>> What flash? We try to autodetect NAND as much as possible. Perhaps we
>>> should be adding infrastructure support instead of hacking it with a DT
>>> property.
>>>
>> We can't auto detect it and thats why the DT approach was taken. We
>> will double check that.
>
> I though sub page writing was one of the fields in the onfi and/or jedec(toggle) meta data structures. Have you looked there?
>
Am not sure if I follow you. The limitation is from the TI NAND controller(AEMIF) and
not the NAND memory.

regards,
Santosh