Hi Jagan,
Jagan Teki <ja...@amarulasolutions.com> wrote on Fri, 28 Sep 2018
19:09:21 +0530:
> On Fri, Sep 28, 2018 at 3:10 PM Miquel Raynal <miquel.ray...@bootlin.com>
> wrote:
> >
> > Hi Miquel,
> >
> > Miquel Raynal <miquel.ray...@bootlin.com> wrote on Fri, 28 Sep 2018
> > 09:35:02 +0200:
> >
> > > Hi Jagan,
> > >
> > > Jagan Teki <ja...@amarulasolutions.com> wrote on Fri, 28 Sep 2018
> > > 12:56:43 +0530:
> > >
> > > > On Fri, Sep 28, 2018 at 12:38 PM Miquel Raynal
> > > > <miquel.ray...@bootlin.com> wrote:
> > > > >
> > > > > Hi Jagan,
> > > > >
> > > > > Jagan Teki <ja...@amarulasolutions.com> wrote on Fri, 28 Sep 2018
> > > > > 12:18:49 +0530:
> > > > >
> > > > > > On Thu, Sep 27, 2018 at 3:04 PM Miquel Raynal
> > > > > > <miquel.ray...@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 made some cleanups in the MTD layer and
> > > > > > > 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 (stripped version since ~30 patches
> > > > > > > have
> > > > > > > already been taken):
> > > > > > > - Support for spi-nand devices in mtdparts.
> > > > > > > - Generics mtdparts/mtdids parsers.
> > > > > > > - A new 'mtd' command.
> > > > > > > - A note to set mtdparts command legacy.
> > > > > > >
> > > > > > > To test your SPI-NAND device with U-Boot, you can test someting
> > > > > > > like:
> > > > > > >
> > > > > > > > setenv mtdparts 'spi-nand0:1m(foo),-(bar)'
> > > > > > > > setenv mtdids 'spi-nand0=spi0.0' # spi0.0 is Linux MTD name for
> > > > > > > > this device
> > > > > > > > ubi part bar # create a static UBI volume in the bar
> > > > > > > > partition
> > > > > > > > mtd list # show the current MTD devices/partitions
> > > > > > >
> > > > > > > Thanks,
> > > > > > > Miquèl
> > > > > > >
> > > > > > >
> > > > > > > NB1: If UBI refuses to attach, verify the partition is epty with
> > > > > > > # mtd erase bar
> > > > > > >
> > > > > > > NB2: If your U-Boot crashes and you are using a non SPI-NAND
> > > > > > > device,
> > > > > > > don't forget to probe your device *first* (sf probe, ...).
> > > > > > >
> > > > > > >
> > > > > > > Changes since v9:
> > > > > > > -----------------
> > > > > > > * mtd_search_alternate_name() is moved in mtd_uboot.c (generic
> > > > > > > code,
> > > > > > > everybody wants to use mtdids).
> > > > > > > * mtd_parse_partitions() is still in mtdparts.c because it
> > > > > > > depends on
> > > > > > > partitions support, but the header file declaring it
> > > > > > > (include/linux/mtd/partitions.h) also has a dummy function if
> > > > > > > #if IS_ENABLED(CONFIG_MTD_PARTITIONS) is false.
> > > > > > > * Typo corrected in mtd_parse_partitions prototype
> > > > > > > (s/_nb_parts/_nparts/).
> > > > > > > * Added Boris' R-b tags.
> > > > > > >
> > > > > > > Changes since v8 (called v7 by mistake):
> > > > > > > ----------------------------------------
> > > > > > > * Moved most of the generic logic to the core (mtd_uboot.c) so
> > > > > > > that it
> > > > > > > can be reused by other parts of U-Boot without depending on
> > > > > > > anything
> > > > > > > else than the MTD core itself.
> > > > > > > * Removed the "#ifdef CONFIG_MTD" around mtd_probe_devices()
> > > > > > > calls now
> > > > > > > that the code is in the core.
> > > > > > > * Created an helper for partitions deletion (as there is one to
> > > > > > > parse/create partition objects).
> > > > > > > * Enhanced a bit the text in Kconfig about deprecating mtdparts.
> > > > > > > * Fixed checkpatch.pl warnings in the mtdparts driver.
> > > > > > > * Drop "cmd: mtdparts: try to probe the MTD devices as a
> > > > > > > fallback" to
> > > > > > > actually deprecate the command.
> > > > >
> > > > > [...]
> > > > >
> > > > > > > Miquel Raynal (7):
> > > > > > > mtd: uclass: add probe function
> > > > > > > mtd: mtdpart: add a generic mtdparts-like parser
> > > > > > > mtd: uboot: search for an equivalent MTD name with the mtdids
> > > > > > > mtd: mtdpart: implement proper partition handling
> > > > > > > cmd: mtd: add 'mtd' command
> > > > > > > cmd: ubi: clean the partition handling
> > > > > > > cmd: mtdparts: describe as legacy
> > > > > >
> > > > > > I didn't find this mtdparts fallback change[1] in v10? does this
> > > > > > fallback issue fixed differently.
> > > > > >
> > > > > > [1]
> > > > > > https://github.com/openedev/u-boot-amarula/commit/9edbc2be512c9bd572884c53b5f54b583e897e9b
> > > > > >
> > > > >
> > > > > Indeed, I dropped this patch on Boris advice: if we want to deprecate
> > > > > this command, we should not add new features to it (see the above
> > > > > changelog).
> > > >
> > > > OK.
> > > >
> > > > Here are all spi-nand changes[2], I still find the build issues[3],
> > > > any dependencies other than these changes?
> > > >
> > > > [2] https://github.com/openedev/u-boot-amarula/commits/wip-spi-nand
> > >
> > > Seems good to me!
> > >
> > > > [3] https://travis-ci.org/openedev/u-boot-amarula/builds/434479310
> > >
> > > Indeed, builds are failing because of SZ_4K is not defined (mostly arm
> > > boards). For an unknown reason it does not break with my setup (I'm on
> > > mips right now).
> > >
> > > Let me fix this, I'll keep you udpated.
> >
> > I fixed the SZ_4K and the dev_uclass_get_priv() issues, I hope there
> > are no more relevant warnings/errors than these two.
> >
> > Please receive two patches independently with their own changelog, they
> > should replace their counterpart in your spi-nand-wip branch (titles
> > are exactly the same). Please tell me if you have troubles replacing
> > it. Once Travis build is restarted, please share the link, I'll
> > monitore it.
>
> Yes, replaced.
>
> Here is the build [4], seems not good.
>
> [4] https://travis-ci.org/openedev/u-boot-amarula/builds/434572246
Yes, I added my U-Boot repository to the Travis CI system, still
errors... https://travis-ci.org/miquelraynal/u-boot
Working on it.
Thanks,
Miquèl
--
Miquel Raynal, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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