[U-Boot] [PATCH 2/2] mtd: Get rid of board_mtdparts_default()

[Boris Brezillon <boris.brezillon@bootlin.com>]

On Wed, 12 Dec 2018 12:37:04 +0100
Ladislav Michl <ladis@linux-mips.org> wrote:
 
> Now problem is that IGEPv2 comes with quite many configurations, some of
> them are even customized, so static configuration is a show stopper
> mainly as I do not know what devices are in field.
> Another issue is how ubispl code works: It expects struct ubispl_info
> filled with (among others) peb_offset of ubi partition. ubispl code counts
> in terms of eraseblocks regardless of their size. So we would need to touch
> this number when using static mtdparts.

Okay.

> 
> > > Hence runtime detection. That code could be used
> > > on all OMAP3 boards as BootROM reads up to first four sectors searching
> > > for SPL (MLO).  
> > 
> > Note that, for the nand side of things, you can also automate that using
> > a u-boot script:
> > 
> > nand info; setexpr splsize ${nand_erasesize} * 4; setenv mtdparts mtdparts=omap2-nand:0x${splsize}(SPL),-(UBI)  
> 
> That seems as a way to go!

Glad you like this idea.

> 
> > Shouldn't be hard to patch the onenand cmd to also expose writesize,
> > erasesize and oobsize.  
> 
> Side note: I never fully understand why is OneNAND using separate set of
> commands.

Hehe. That's exactly what Miquel tries to address with the mtd command
(one command to rule them all).

> 
> Could you hold merging your paches until I implement above idea and test
> it on a few boards? I know u-boot is now using two months merge window,
> which is unfortunate, so I'll try to do it as soon as possible, but I do
> not think I'll finish it till end of week.

No worries. This is not urgent and can definitely wait 2019.04.

Thanks,

Boris