[U-Boot] [PATCH 03/16] spi: Add non DM version of SPI_MEM

[Vignesh R]

On 13/12/18 1:55 AM, Jagan Teki wrote:
> On Wed, Dec 12, 2018 at 11:08 PM Vignesh R <vigneshr at ti.com> wrote:
>>
>> Add non DM version of SPI_MEM to support easy migration to new SPI NOR
>> framework. This can be removed once DM_SPI conversion is complete.
> 
> Our intention to use new driver to follow dm, why we need to support
> non-dm? any usecases?
> 

As said by others, AFAICS, DM_SPI migration is not going to be complete
anytime soon. There are many boards and configs that don't enable
DM_SPI. I propose you add a patch to print _warning during build_ for
boards that don't have DM_SPI enabled (like DM_MMC and DM_USB) targeting
v2019.07 or v2019.04 as deadline for removal. At the deadline you can
remove spi-mem-nodm.c along with all other non DM code in SPI core.

Else, I need to reintroduce code that uses wrappers in sf.c which means
two separate code paths/logics in spi-nor-core.c that adds to SPL code size

I don't think it makes sense to block new development for majority of
folks who are already migrated to DM_SPI. If we end up completing DM_SPI
migration before merging this series, this patch can be dropped w/o any
side effects.

-- 
Regards
Vignesh