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

[Jagan Teki]

On Thu, May 17, 2018 at 4:49 PM, Prabhakar Kushwaha
<prabhakar.kushwaha at nxp.com> wrote:
> Dear Jagan,
>
>> -----Original Message-----
>> From: U-Boot [mailto:u-boot-bounces at lists.denx.de] On Behalf Of
>> Prabhakar Kushwaha
>> Sent: Monday, May 14, 2018 6:55 PM
>> To: Jagan Teki <jagannadh.teki at gmail.com>
>> Cc: u-boot at lists.denx.de
>> Subject: Re: [U-Boot] mtd: spi-nor: new NXP FlexSPI driver location &
>> framework to use ?
>>
>> Thanks Jagan,
>>
>> > -----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.
>>
>> This means, flexspi controller driver should be upstream'ed via u-boot-
>> spi/drivers/mtd/spi-nor branch mtd-spinor-working
>>
>
> Please help me with the query.
> We don’t want to end up with 2 FlexSPI drivers being posted in upstream.

Let me understand is this FlexSPI is spi-nor controller, is it Linux
upstreamed or ML? I think for now you can add it mtd/spi with
UCLASS_SPI_FLASH driver, Since Boris mentioned about spi-mem(I still
need to see the Linux framework for more details) which may be
re-placer for spi-nor but once we decided to go with spi-mem or
spi-nor then the flexspi can convert accordingly.

Jagan.

-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.