EXYNOS will support only DT from v3.10

EXYNOS will support only DT from v3.10

[Kukjin Kim]

Hi all,

As we discussed before, it's time to decide to support non-DT for EXYNOS
SoCs.

If everybody else agrees to drop non-DT support from v3.10, I will. Feel
free to talk your opinion about that.

Thanks.

- Kukjin

EXYNOS will support only DT from v3.10

[Arnd Bergmann]

On Monday 25 March 2013, Kukjin Kim wrote:
> 
> Hi all,
> 
> As we discussed before, it's time to decide to support non-DT for EXYNOS
> SoCs.
> 
> If everybody else agrees to drop non-DT support from v3.10, I will. Feel
> free to talk your opinion about that.

+1

That will certainly simplify enabling multiplatform support as well.
I still have my series that I did recently for multiplatform support,
but I guess we need to coordinate better. Do you have a branch that
I can rebase on? There are still a couple of open questions in my
patches that I'd like to resolve as soon as possible.

	Arnd

EXYNOS will support only DT from v3.10

[Mark Brown]

On Mon, Mar 25, 2013 at 08:01:23PM +0900, Kukjin Kim wrote:

> As we discussed before, it's time to decide to support non-DT for EXYNOS
> SoCs.

> If everybody else agrees to drop non-DT support from v3.10, I will. Feel
> free to talk your opinion about that.

No problem for me on Exynos, though it would be a bit of an issue to
loose it for s3c64xx right now.
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EXYNOS will support only DT from v3.10

[Arnd Bergmann]

On Monday 25 March 2013, Mark Brown wrote:
> On Mon, Mar 25, 2013 at 08:01:23PM +0900, Kukjin Kim wrote:
> 
> > As we discussed before, it's time to decide to support non-DT for EXYNOS
> > SoCs.
> 
> > If everybody else agrees to drop non-DT support from v3.10, I will. Feel
> > free to talk your opinion about that.
> 
> No problem for me on Exynos, though it would be a bit of an issue to
> loose it for s3c64xx right now.

We don't have any DT support for S3C and S5P upstream yet, so I would
certainly agree on that. I think we should plan at least one release of
supporting both simultaneously in order to find bugs with the DT
implementation before we can consider removing ATAGS support for any
major platform.

However, I also really want to see all ARMv6 and ARMv7 platforms
get moved over to use ARCH_MULTIPLATFORM, and it probably makes sense
to eventually move over all platforms that support ARCH_MULTIPLATFORM
to be DT-only. I hope we do both for EXYNOS in 3.10, and then do at
least MULTIPLATFORM support for S5P* in 3.11, possibly also for S3C64xx,
in order to convert all ARMv6 and ARMv7 platforms to MULTIPLATFORM.

For the ARMv5 platforms (S3C24xx and others), we can be much more flexible
with the timing, plus we can keep S3C and S5P in a state where they are
DT-only in multiplatform configurations but allow ATAGS when configured
as standalone like we do today, at least for a couple of releases after
introducing multiplatform support, until we are comfortable with the DT
support and don't break any working platforms.

	Arnd

EXYNOS will support only DT from v3.10

[Mark Brown]

On Mon, Mar 25, 2013 at 12:37:38PM +0000, Arnd Bergmann wrote:

> We don't have any DT support for S3C and S5P upstream yet, so I would
> certainly agree on that. I think we should plan at least one release of
> supporting both simultaneously in order to find bugs with the DT
> implementation before we can consider removing ATAGS support for any
> major platform.

We really ought to look into fixing the bootloader protocol to allow
ATAGS and DT simultaneously BTW, the current situation is a pain
especially if you need uImage.

> However, I also really want to see all ARMv6 and ARMv7 platforms
> get moved over to use ARCH_MULTIPLATFORM, and it probably makes sense
> to eventually move over all platforms that support ARCH_MULTIPLATFORM
> to be DT-only. I hope we do both for EXYNOS in 3.10, and then do at
> least MULTIPLATFORM support for S5P* in 3.11, possibly also for S3C64xx,
> in order to convert all ARMv6 and ARMv7 platforms to MULTIPLATFORM.

The pluggable modules on Cragganmore are going to be a problem for that,
I have some ideas for a subsystem to handle the remapping generically
but not had the time to actually do it yet.  The stuff the BeagleBone
guys were pushing wasn't suitable as it seemed like it was basically
just a wrapper around DT which excludes non-DT platofrms.
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EXYNOS will support only DT from v3.10

[Arnd Bergmann]

On Monday 25 March 2013, Mark Brown wrote:
> On Mon, Mar 25, 2013 at 12:37:38PM +0000, Arnd Bergmann wrote:
> 
> > We don't have any DT support for S3C and S5P upstream yet, so I would
> > certainly agree on that. I think we should plan at least one release of
> > supporting both simultaneously in order to find bugs with the DT
> > implementation before we can consider removing ATAGS support for any
> > major platform.
> 
> We really ought to look into fixing the bootloader protocol to allow
> ATAGS and DT simultaneously BTW, the current situation is a pain
> especially if you need uImage.

I think the plan at the moment is to extend the atags wrapper to allow
picking one out of multiple device tree blobs, which matches the
machine ID, rather than having to know the right one in advance.

	Arnd

EXYNOS will support only DT from v3.10

[Heiko Stübner]

Am Montag, 25. M?rz 2013, 12:01:23 schrieb Kukjin Kim:
> Hi all,
> 
> As we discussed before, it's time to decide to support non-DT for EXYNOS
> SoCs.
> 
> If everybody else agrees to drop non-DT support from v3.10, I will. Feel
> free to talk your opinion about that.

no problems here ... as long as the platform hooks in the drivers exynos and 
s3c24xx share stay where they are.


Heiko

EXYNOS will support only DT from v3.10

[Sylwester Nawrocki]

On 03/25/2013 12:01 PM, Kukjin Kim wrote:
> Hi all,
> 
> As we discussed before, it's time to decide to support non-DT for EXYNOS
> SoCs.
> 
> If everybody else agrees to drop non-DT support from v3.10, I will. Feel
> free to talk your opinion about that.

I'm fine with supporting Exynos as dt-only from 3.10. We just need to
resolve some issues with samsung pwm/timers to get DT board support for
Universal_c210 working. Currently Tomasz Figa is working on it. Hopefully
it all can be finished this week.

I'll see if I can find some spare time and help out with porting S5PV210
to DT.


Regards,
Sylwester