[U-Boot] mtd: spi-nor: new NXP FlexSPI driver location & framework to use ?

[Jagan Teki]

On Mon, May 14, 2018 at 2:42 PM, Ashish Kumar <ashish.kumar at nxp.com> wrote:
>
>
>> -----Original Message-----
>> From: Jagan Teki [mailto:jagannadh.teki at gmail.com]
>> Sent: Friday, May 11, 2018 11:31 AM
>> To: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
>> Cc: Jagan Teki <jagan at amarulasolutions.com>; York Sun <york.sun at nxp.com>;
>> Yogesh Narayan Gaur <yogeshnarayan.gaur at nxp.com>; Poonam Aggrwal
>> <poonam.aggrwal at nxp.com>; Ashish Kumar <ashish.kumar at nxp.com>; u-
>> boot at lists.denx.de
>> Subject: Re: mtd: spi-nor: new NXP FlexSPI driver location & framework to use ?
>>
>> On Fri, May 11, 2018 at 11:08 AM, Prabhakar Kushwaha
>> <prabhakar.kushwaha at nxp.com> wrote:
>> > Dear Jagan,
>> >
>> > NXP is coming up with new FlexSPI controller. It is similar to existing QSPI with
>> enhanced feature-set.
>> > We have the driver ready as per existing framework i.e. driver/spi.
>> >
>> > From recend discussion, we go to know about framework change.
>> > Migration of qspi drivers in u-boot-spi/drivers/mtd/spi-nor/
>> git://git.denx.de/u-boot-spi.git branch mtd-spinor-working.
>> >
>> > We are in dilemma for sending FlexSPI driver upstream.
>> > Do we follow existing framework i.e. driver/spi   or new proposed framework
>> i.e. u-boot-spi/drivers/mtd/spi-nor/
>> >
>> > Also, do we have any timeline of u-boot-spi/drivers/mtd/spi-nor/ to become
>> default.
>>
>> Idea is to move spi-nor, mtd-spinor-working is paused because of non-dm
>> drivers accessing. We are clear that we can't create another legacy layer to
>> access spi-nor for the sake of non-dm driver to work which eventually ended-up
>> another mess and also no one take care of non-dm conversion to dm if we give
>> such feasibility. So we exported a deadline for full SPI/SPI_FLASH DM conversion
>> till v2018.09. Once all these relevant conversion done, will try to move.
>>
> Hello Jagan,
>
> You have mentioned here http://git.denx.de/?p=u-boot-spi.git;a=commitdiff;h=c4e68d3aa8178f6aa63a79c4f8f459c0e3ed58e8
>
> Snip from above link:
> +Partially converted:
> +       drivers/spi/atcspi200_spi.c
> +       drivers/spi/davinci_spi.c
> +       drivers/spi/fsl_dspi.c
> +       drivers/spi/fsl_qspi.c
>
> That fsl_qspi.c is partial converted to DM model, is there any guide line to follow for missing stuff ?

We should fully convert the driver into dm, no #ifdef CONFIG_DM_SPI