[U-Boot] [RFC PATCH 00/20] SPI-NAND support

[Miquel Raynal]

Hi Jagan,

Jagan Teki <jagan at amarulasolutions.com> wrote on Fri, 6 Jul 2018
17:13:21 +0530:

> On Wed, Jun 6, 2018 at 9:00 PM, Miquel Raynal <miquel.raynal at bootlin.com> wrote:
> > During the last months, Boris Brezillon shared his work to support
> > serial flashes within Linux. First, he delivered (and merged) a new
> > layer called spi-mem. He also initiated in Linux MTD subsystem the move
> > of all 'raw' NAND related code to a raw/ subdirectory, adding at the
> > same time a NAND core that would be shared with all NAND devices. Then,
> > he contributed a generic SPI-NAND driver, making use of this NAND core,
> > as well as some vendor code to drive a few chips.
> >
> > On top of this work, I added an 'mtd' U-Boot command to handle all sort
> > of MTD devices. This should become the default command instead of having
> > one per flash flavor ('sf', 'nand', 'spi-nand' ?).
> >
> > The series has been tested on an Ocelot board PCB123 (VSC7514),
> > featuring a Macronix SPI NAND chip.
> >
> > TL;DR: the series contains:
> > - Various fixes and re-organization of the MTD subsystem.
> > - The introduction of the SPI-mem interface.
> > - The addition of the generic SPI-NAND driver (and its bindings).
> > - Several SPI NAND chip drivers (Macronix, Micron, Winbond).
> > - A new 'mtd' command.
> > - DT changes to make use of a SPI NAND on the Ocelot board.
> >
> > Any comments on the code, the organization and the respect of U-Boot
> > driver model will be welcome.
> >
> > Thanks,
> > Miquèl
> >
> >
> > Boris Brezillon (6):
> >   mtd: Fallback to ->_read/write_oob() when ->_read/write() is missing
> >   mtd: nand: Add core infrastructure to deal with NAND devices
> >   mtd: nand: Pass mode information to nand_page_io_req
> >   spi: Extend the core to ease integration of SPI memory controllers
> >   mtd: spinand: Add initial support for the MX35LF1GE4AB chip
> >   dt-bindings: Add bindings for SPI NAND devices
> >
> > Brian Norris (1):
> >   mtd: add get/set of_node/flash_node helpers
> >
> > Frieder Schrempf (1):
> >   mtd: spinand: Add initial support for Winbond W25M02GV
> >
> > Miquel Raynal (10):
> >   mtd: fix build issue with includes
> >   mtd: move definitions to enlarge their range
> >   mtd: move all flash categories inside MTD submenu
> >   mtd: move NAND fiels into a raw/ subdirectory
> >   mtd: rename nand into rawnand in Kconfig prompt
> >   mtd: spinand: Add initial support for the MX35LF2GE4AB chip
> >   mtd: uclass: add probe function
> >   cmd: mtd: add 'mtd' command
> >   mips: dts: ocelot: describe SPI CS pins
> >   mips: dts: ocelot: add the SPI NAND node
> >
> > Peter Pan (2):
> >   mtd: nand: Add core infrastructure to support SPI NANDs
> >   mtd: spinand: Add initial support for Micron MT29F2G01ABAGD  
> 
> I have reviewed and commented most of the stuff that are in my
> control, except few spi-nand code, which I would like to give a try to
> other people in the list. Hope to seen the fine-tuning patches on next
> version.

Thanks for taking the time to review all this; I'm on it.

About spi-nand, reviews from other contributors are welcome, but it's
mostly a copy from Linux framework that I just applied to nand/next.
There have been 9 versions of it before that so I think it's pretty
well reviewed.

Thanks,
Miquèl