spi-nor: maxronix MX25L12835F support

[Tudor.Ambarus at microchip.com]

On 2/15/21 11:53 PM, Heiko Thiery wrote:
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> 
> Hi all,
> 
> I faced an issue with a SPI flash on our board. We use a macronix
> MX25L12835F [1]. Unfortunately this flash has the same JEDEC ID like
> the MX25L12805D [2].
> 
> The newer MX25L12835F has support for dual/quad read mode and RDSFDP
> while the older doesn't.
> 
> I thought that I could do a fixup with a device specific
> post_bfpt_fixups() call but by now this seems not possible. The older
> MX25L12805D has no flags set that allows a call to
> spi_nor_sfdp_init_params() and implements the fixup.
> 
> Has anyone an idea how to solve this?
> 
> 

we'll differentiate at runtime, and the differentiator will be whether
SFDP is supported or not. I'm taking care of this, patch will follow.