[PATCH] mtd: spi-nor: intel-spi: Add support for second flash chip

[Mika Westerberg]

Hi,

On Wed, May 26, 2021 at 12:44:16AM +0530, Pratyush Yadav wrote:
> Hi,
> 
> On 25/05/21 07:03PM, Mika Westerberg wrote:
> > Intel SPI flash controller has been supporting two chip selects long
> > time already even if the most common configuration is to have single
> > flash chip for the BIOS and related data. This adds support for the
> > second chip select if we find out that there are two flash components
> > (this information is available in the mandatory flash descriptor on the
> > first chip). The second chip is exposed as is without any partition
> > information with name "chip1". The first chip continues work as is.
> > 
> > Signed-off-by: Mika Westerberg <mika.westerberg at linux.intel.com>
> > ---
> >  drivers/mtd/spi-nor/controllers/intel-spi.c | 208 ++++++++++++++------
> 
> Aren't the drivers in controllers/ supposed to move to use SPI MEM? I 
> don't know if this has been discussed before, but I would like all 
> drivers in controllers/ to move to SPI MEM API at some point in the 
> future. This would let us drop support for this "legacy" controller API 
> from SPI NOR, cleaning up the core quite a bit. No more if (nor->spimem) 
> needed anywhere.

What is SPI MEM? :) Looking at the mainline v5.13-rc3 controllers/ there
is no single driver "converted" to SPI MEM, at least from a quick
clance.

> I wonder what other folks think about this. I vote for freezing all new 
> features in controllers/. If you want something new, move to SPI MEM.

I think at this point it is not reasonable to expect that all controller
drivers move to your new framework that has not even landed the
mainline ;-) Or did I miss something?