[U-Boot] [U-Boot-Custodians] [U-Boot-Board-Maintainers] [RFC] Eliminate boards not using CONFIG_DM=y

[Tom Rini]

On Tue, Nov 26, 2019 at 05:47:48PM +0100, Marek Vasut wrote:
> On 11/26/19 5:26 PM, Tom Rini wrote:
> > On Tue, Nov 26, 2019 at 09:11:51AM +0100, Marek Vasut wrote:
> >> On 11/26/19 12:16 AM, Heinrich Schuchardt wrote:
> >>> Dear maintainers,
> >>
> >> Hi,
> >>
> >>> we have been trying to move to the driver model for several years now.
> >>> Starting in 2018 we have added warnings to the Makefile that boards not
> >>> supporting the driver model will be eliminated. Still 24 % of the
> >>> configuration files have not been converted and do not even use
> >>> CONFIG_DM=y.
> >>>
> >>> If we want to get rid of legacy drivers, at some point we have to remove
> >>> the 347 configuration files in the list below not using the driver model.
> >>>
> >>> I suggest to do this directly after the release of v2020.01 scheduled
> >>> January 6th.
> >>>
> >>> This should not stop the maintainers from reinserting the boards after
> >>> conversion to the driver model.
> >>
> >> Some boards just cannot accommodate this DM stuff. For those boards,
> >> it's just bloat without any useful added value. Hence, these boards
> >> would be removed because they cannot accommodate arbitrary bloat. This
> >> makes U-Boot not-so-universal bootloader anymore, but rather a bloated one.
> >>
> >> I don't think we can force boards out or impose DM on everyone unless we
> >> can solve this bloat issue first.
> > 
> > As someone who was involved in creating this DM stuff, do you have some
> > ideas on addressing things?  Given that you're responsible for a number
> > of these platforms and can test out some ideas on them, what are you
> > suggesting?
> 
> How about directly calling driver functions for drivers which have
> single instance only ? Then we could optimize out all the DM overhead
> for that.

And when are you hoping to post an RFC / example?

-- 
Tom
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