[U-Boot] [PATCH v5 00/26]MTD defconfigs/Kconfigs/Makefiles heavy cleanup

[Tom Rini]

On Thu, Oct 03, 2019 at 07:50:02PM +0200, Miquel Raynal wrote:

> Hello,
> 
> A year ago, while working on SPI-NAND support in U-Boot, I discovered
> when modifying Makefiles a confusing organization where:
> * Sub-directories/files are compiled from the root Makefile
> * Commands are at the root of everything
> 
> First I sent a series to move Makefile entries in their respective
> directories. Then, I decided to continue working on the clarification
> of the Makefile hierarchy in MTD and I sent four iterations of this
> series which did not got merge at that time. Anyway, I revived this
> series by rebasing all my work and updating everything that needed an
> update.
> 
> Here are the main points of the re-organization:
> * Rename CONFIG_MTD into CONFIG_DM_MTD to reserve CONFIG_MTD to what
>   is called today CONFIG_MTD_DEVICE.
> * Fix build dependencies in defconfigs, like: "UBI and NAND depend on MTD".
> * Fix the Kconfig files to reflect these dependencies (as defconfigs
>   have been updated, nothing should break).
> * Simplify the Makefiles: compiling the drivers/mtd/nand/raw/
>   sub-directory should just depend on MTD being compiled and the NAND
>   core as well, there is absolutely no logic to make it depend on
>   CMD_NAND.
> 
> The New green Travis CI build for the fifth version of this series is
> there (yes, 53 iterations):
> 
> Please note that the only red test fails because of timeout, not an
> actual error (at least I could not spot it). It is possible that this
> series will produce noticeable changes for the users. The only reason
> for that is because their configuration file was wrong. I have done my
> best to fix them one by one, but I am not omniscient.

OK, so I want to grab this series, and I intend to do my best to do so.
But the problem this exposes is just how complex the uses of CONFIG_NAND
got and in turn symbol re-use, on PowerPC.  This (+ v6) showed a few
minor migration problems when I size compared, and those are easily
fixed.  What isn't so easily fixed is that it was also changing
how/where the environment is found on some PowerPC boards.  Fixing that
in turn requires finally finishing off the migration of the main
CONFIG_ENV_xxx symbols to Kconfig.  I have this done outside of about 20
boards.  I'm going to get that finished up as soon as I can and posted,
then make this series depend on that.  Thanks again for doing the hard
work here, we really need this particular migration and clean up!

-- 
Tom
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