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List:       linaro-dev
Subject:    For the device tree topic, is there anything I can do in the 11.12 (28th November 2011 - 18th Novemb
From:       botao.sun () linaro ! org (Botao Sun)
Date:       2011-11-30 4:32:17
Message-ID: CAMGVPmXHNPp5=HDrEAFyUrrRCv5ncFG9xtJmKsHcyC9fv0FkOA () mail ! gmail ! com
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Hi Thomas,

Thank you for your so quickly response! :)

According to your information, I prefer not to back-port those patches.

@Angus, The waiting time is even longer than I thought: 3.1 - 3.2rc1, and
looks like it's impossible to get 3.2 kernel in the Origen Android build
before the end of 11.12. Would you estimate a time frame for the 3.2 kernel
upgrade work? Then before that, I will focus on the other tasks of mine.

Thank you!


BR
Botao Sun

On Wed, Nov 30, 2011 at 12:20 PM, Thomas Abraham
<thomas.abraham at linaro.org>wrote:

> Hi Botao,
>
> On 30 November 2011 09:36, Botao Sun <botao.sun at linaro.org> wrote:
> > Hi Angus & Grant,
> >
> > Because the Linaro Android 11.11 release has been done successfully, I
> have
> > some time to continue to work on device tree topic, here is my blue print
> > for it:
> >
> >
> https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-origen-device-tree
> >
> > Therefore, I would like to know what I can do for this in the 11.12
> cycle -
> > from now to the 18th December 2011. For Samsung Origen Android build, the
> > latest kernel version I got is still 3.0.4+, so I think there is no any
> > device tree stuff in it.
> >
> > @Angus, Would you give me a brief about the device tree support status on
> > our current 3.0.4+ kernel? Will you upgrade it to the 3.1 in 11.12 cycle?
> >
> > @Thomas, In this blue print:
> >
> https://blueprints.launchpad.net/linaro-android/+spec/linaro-platforms-lc4.11-android-device-tree
> ,
> > Tony mentioned that you has upstreamed the initial support for device
> tree.
> > However, it depends on the 3.1 kernel upgrade. I would like to know that
> is
> > there any possible that I can do something without the kernel upgrade?
>
> All the existing Exynos4210 device tree patches are based on
> linux-3.2-rc1. There are about 35+ device tree support patches
> covering about 10 peripherals. Most of these patches will not apply
> cleanly to a previous version of the kernel. And in some cases, these
> patches depend on other patches merged during 3.2 merge window (like
> the GIC dt support). Though it might be possible to backport these
> patches, the effort would huge and not recommended.
>
> Thanks,
> Thomas.
>
> >
> > I currently feel that this work highly depends on the outcome of landing
> > team and kernel group, so before I get something from them, I'm afraid
> that
> > I can't do any "real" work on this.
> >
> > Thank you all for your help!
> >
> >
> > BR
> > Botao Sun
> >
> >
>
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