[PATCHv3 2/3] drivers: mtd: devices: Add quad read support.

[Gupta, Pekon]

Hi,

> From: Jagan Teki
> > Sourav Poddar <sourav.poddar at ti.com>
> > Some flash also support quad read mode.
> > Adding support for adding quad mode in m25p80
> > for spansion and macronix flash.
> 
> I am some how not happy with this approach, adding a flags on flash
> param table for supporting
> quad operation in specific flash is may be a better idea.
> 
> But reading SFDP, is a good idea to get the details of flash - quad
> support is one of them.
> and we can assign quad read or fast read based on that.
> 
> Any comments.
> 
Currently SFDP is mostly supported only on Micron devices, that
too the newer ones. So we don't know whether SFDP would be
accepted by other major SPI NOR manufactures like:
Spansion, Nymonix, Micronix, Toshiba, Samsung..

Thus, it might end-up like CFI (common flash interface) where some
vendors support it while others did not. So unless there are more
devices on SFDP from different vendors, I would prefer defer its
implementation in generic driver.

with regards, pekon