[U-Boot] [PATCH 66/93] arm: Remove ot1200 board

[Simon Glass]

Hi,

On Thu, 22 Nov 2018 at 10:02, Tom Rini <trini at konsulko.com> wrote:
>
> On Thu, Nov 22, 2018 at 03:44:28PM +0100, Simon Goldschmidt wrote:
> > Am Do., 22. Nov. 2018, 14:44 hat Tom Rini <trini at konsulko.com> geschrieben:
> >
> > > On Thu, Nov 22, 2018 at 02:24:49PM +0100, Marek Vasut wrote:
> > > > On 11/22/2018 01:52 PM, Tom Rini wrote:
> > > > > On Thu, Nov 22, 2018 at 10:25:14AM +0100, Christian Gmeiner wrote:
> > > > >
> > > > >> Am Mo., 19. Nov. 2018 um 16:56 Uhr schrieb Simon Glass <
> > > sjg at chromium.org>:
> > > > >>>
> > > > >>> This board has not been converted to CONFIG_DM_BLK by the deadline.
> > > > >>> Remove it.
> > > > >>>
> > > > >>
> > > > >> As the board is still mainted I will NAK it for the moment. Are there
> > > > >> any hints want needs to be done
> > > > >> to port thie board over to new DM stuff?
> > > > >
> > > > > Yes, as a start you need to switch over to using CONFIG_OF_CONTROL and
> > > > > selecting/providing a dtb file.  I see ot1200 is using DWC_AHSATA which
> > > > > needs more work, but this is the board-level work that needs doing.
> > > >
> > > > Wasn't there a possibility to use platform data in board file instead of
> > > > DT ? Or is DT mandatory now , including the libfdt overhead ?
> > >
> > > In short, DT for U-Boot and platform data for SPL is what's recommended,
> > > yes.
> > >
> >
> > This is a little confusing for me. Socfpga gen5 SPL doesn't do that. And it
> > seems a little strange or outdated overall.
> >
> > Would there be some kind of reference architecture or mach to look at
> > what's the suggested/up-to-date way to implement SPL? Also regarding code
> > flow?
>
> So, SPL is where things get, ahem, fuzzy.  While I don't want to
> encourage boundless growth in U-Boot proper, we aren't exactly size
> constrained (but rather, functional/logical constrained).  But in SPL,
> yes, we have many platforms with 32/64/128 kilobyte hard limits (and
> some smaller) and we can't always shove in a "TPL" before SPL either.
> So in SPL we do make use of platform data instead.  While not the
> smallest size constraint, am335x_hs_evm is a reasonable thing to look at
> in this case.

Also 'rock' uses CONFIG_OF_PLATDATA which provides a halfway house -
still uses DT, but it gets converted into C structs so saves code
space.

firefly-rk3288 is a pretty good DM/DT example, including SPL.

Regards,
Simon