Hi Jagan, On Fri, 11 May 2018 11:30:43 +0530 Jagan Teki <jagannadh.t...@gmail.com> wrote:
> On Fri, May 11, 2018 at 11:08 AM, Prabhakar Kushwaha > <prabhakar.kushw...@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. Just for the record, the spi-mem interface has been accepted in Linux [1] (should be there in 4.18). From now on, I'll try to encourage people move existing spi-nor controller drivers to the SPI subsystem, and I'll definitely ask new QPSI drivers to use this interface (and extend it if needed). So, I'm not sure creating this spi-nor subsystem in uboot is a good idea anymore. Of course, it's up to you to decide, but if you take this path you'll run into the same problem we had in Linux: - how to support SPI NANDs in a clean and efficient way - how to support both memory-like operations and regular SPI transfers with the same driver Regards, Boris [1]https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?h=for-4.18&id=c36ff266dc82f4ae797a6f3513c6ffa344f7f1c7 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
